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554 lines
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554 lines
11 KiB
Plaintext
.TH LVMDEVICES 8 "LVM TOOLS #VERSION#" "Red Hat, Inc."
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.SH NAME
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lvmdevices - Manage the devices file
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.
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.SH SYNOPSIS
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\fBlvmdevices\fP \fIoption_args\fP
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.br
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[ \fIoption_args\fP ]
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.br
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.P
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.ad l
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\fB--adddev\fP \fIPV\fP
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.ad b
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.br
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.ad l
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\fB--addpvid\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB--check\fP
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.ad b
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.br
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.ad l
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\fB--commandprofile\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB--config\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB-d\fP|\fB--debug\fP
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.ad b
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.br
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.ad l
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\fB--deldev\fP \fIPV\fP
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.ad b
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.br
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.ad l
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\fB--delpvid\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB--devices\fP \fIPV\fP
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.ad b
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.br
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.ad l
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\fB--devicesfile\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB--driverloaded\fP \fBy\fP|\fBn\fP
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.ad b
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.br
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.ad l
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\fB-h\fP|\fB--help\fP
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.ad b
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.br
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.ad l
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\fB--lockopt\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB--longhelp\fP
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.ad b
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.br
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.ad l
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\fB--nolocking\fP
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.ad b
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.br
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.ad l
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\fB--profile\fP \fIString\fP
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.ad b
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.br
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.ad l
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\fB-q\fP|\fB--quiet\fP
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.ad b
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.br
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.ad l
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\fB-t\fP|\fB--test\fP
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.ad b
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.br
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.ad l
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\fB--update\fP
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.ad b
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.br
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.ad l
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\fB-v\fP|\fB--verbose\fP
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.ad b
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.br
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.ad l
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\fB--version\fP
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.ad b
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.br
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.ad l
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\fB-y\fP|\fB--yes\fP
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.ad b
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.SH DESCRIPTION
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The LVM devices file lists devices that lvm can use. The default file is
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/etc/lvm/devices/system.devices, and the lvmdevices(8) command is used to
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add or remove device entries. If the file does not exist, or if lvm.conf
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includes use_devicesfile=0, then lvm will not use a devices file.
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To use a device with lvm, add it to the devices file with the command
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lvmdevices --adddev, and to prevent lvm from seeing or using a device,
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remove it from the devices file with lvmdevices --deldev. The
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vgimportdevices(8) command adds all PVs from a VG to the devices file,
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and updates the VG metadata to include device IDs of the PVs.
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Commands adding new devices to the devices file necessarily look outside
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the existing devices file to find the devices to add. pvcreate, vgcreate,
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and vgextend also look outside the devices file to create new PVs and add
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them to the devices file.
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LVM records devices in the devices file using hardware-specific IDs, such
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as the WWID, and attempts to use subsystem-specific IDs for virtual device
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types (which also aim to be as unique and stable as possible.)
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These device IDs are also written in the VG metadata. When no hardware or
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virtual ID is available, lvm falls back using the unstable device name as
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the device ID. When devnames are used, lvm performs extra scanning to
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find devices if their devname changes, e.g. after reboot.
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When proper device IDs are used, an lvm command will not look at devices
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outside the devices file, but when devnames are used as a fallback, lvm
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will scan devices outside the devices file to locate PVs on renamed
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devices. A config setting search_for_devnames can be used to control the
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scanning for renamed devname entries.
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Related to the devices file, the new command option --devices <devnames>
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allows a list of devices to be specified for the command to use,
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overriding the devices file. The listed devices act as a sort of devices
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file in terms of limiting which devices lvm will see and use. Devices
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that are not listed will appear to be missing to the lvm command.
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Multiple devices files can be kept in /etc/lvm/devices, which allows lvm
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to be used with different sets of devices, e.g. system devices do not need
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to be exposed to a specific application, and the application can use lvm on
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its own devices that are not exposed to the system. The option
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--devicesfile <filename> is used to select the devices file to use with the
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command. Without the option set, the default system devices file is used.
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Setting --devicesfile "" causes lvm to not use a devices file.
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With no devices file, lvm will use any device on the system, and applies
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the filter to limit the full set of system devices. With a devices file,
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the regex filter is not used, and the filter settings in lvm.conf or the
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command line are ignored. The vgimportdevices command is one exception
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which does apply the regex filter when looking for a VG to import.
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If a devices file exists, lvm will use it, even if it's empty. An empty
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devices file means lvm will see no devices.
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If the system devices file does not yet exist, the pvcreate or vgcreate
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commands will create it if they see no existing VGs on the system.
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lvmdevices --addev and vgimportdevices will always create a new devices file
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if it does not yet exist.
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It is recommended to use lvm commands to make changes to the devices file to
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ensure proper updates.
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.SH USAGE
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Print devices in the devices file.
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.br
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.P
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\fBlvmdevices\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Check the devices file and report incorrect values.
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.br
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.P
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\fBlvmdevices\fP \fB--check\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Update the devices file to fix incorrect values.
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.br
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.P
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\fBlvmdevices\fP \fB--update\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Add a device to the devices file.
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.br
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.P
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\fBlvmdevices\fP \fB--adddev\fP \fIPV\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Remove a device from the devices file.
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.br
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.P
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\fBlvmdevices\fP \fB--deldev\fP \fIPV\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Find the device with the given PVID and add it to the devices file.
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.br
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.P
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\fBlvmdevices\fP \fB--addpvid\fP \fIString\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Remove the devices file entry for the given PVID.
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.br
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.P
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\fBlvmdevices\fP \fB--delpvid\fP \fIString\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Common options for command:
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.
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.RS 4
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.RE
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Common options for lvm:
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.
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.RS 4
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.ad l
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[ \fB-d\fP|\fB--debug\fP ]
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.ad b
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.br
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.ad l
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[ \fB-h\fP|\fB--help\fP ]
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.ad b
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.br
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.ad l
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[ \fB-q\fP|\fB--quiet\fP ]
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.ad b
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.br
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.ad l
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[ \fB-t\fP|\fB--test\fP ]
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.ad b
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.br
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.ad l
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[ \fB-v\fP|\fB--verbose\fP ]
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.ad b
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.br
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.ad l
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[ \fB-y\fP|\fB--yes\fP ]
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.ad b
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.br
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.ad l
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[ \fB--commandprofile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--config\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--devices\fP \fIPV\fP ]
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.ad b
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.br
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.ad l
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[ \fB--devicesfile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--driverloaded\fP \fBy\fP|\fBn\fP ]
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.ad b
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.br
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.ad l
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[ \fB--lockopt\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--longhelp\fP ]
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.ad b
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.br
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.ad l
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[ \fB--nolocking\fP ]
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.ad b
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.br
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.ad l
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[ \fB--profile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--version\fP ]
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.ad b
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.RE
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.SH OPTIONS
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.HP
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.ad l
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\fB--adddev\fP \fIPV\fP
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.br
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Add a device to the devices file.
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.ad b
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.HP
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.ad l
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\fB--addpvid\fP \fIString\fP
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.br
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Find a device with the PVID and add the device to the devices file.
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.ad b
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.HP
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.ad l
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\fB--check\fP
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.br
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Check the content of the devices file.
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.ad b
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.HP
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.ad l
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\fB--commandprofile\fP \fIString\fP
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.br
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The command profile to use for command configuration.
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See \fBlvm.conf\fP(5) for more information about profiles.
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.ad b
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.HP
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.ad l
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\fB--config\fP \fIString\fP
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.br
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Config settings for the command. These override lvm.conf settings.
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The String arg uses the same format as lvm.conf,
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or may use section/field syntax.
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See \fBlvm.conf\fP(5) for more information about config.
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.ad b
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.HP
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.ad l
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\fB-d\fP|\fB--debug\fP ...
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.br
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Set debug level. Repeat from 1 to 6 times to increase the detail of
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messages sent to the log file and/or syslog (if configured).
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.ad b
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.HP
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.ad l
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\fB--deldev\fP \fIPV\fP
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.br
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Remove a device from the devices file.
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.ad b
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.HP
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.ad l
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\fB--delpvid\fP \fIString\fP
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.br
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Remove a device with the PVID from the devices file.
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.ad b
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.HP
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.ad l
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\fB--devices\fP \fIPV\fP
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.br
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Devices that the command can use. This option can be repeated
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or accepts a comma separated list of devices. This overrides
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the devices file.
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.ad b
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.HP
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.ad l
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\fB--devicesfile\fP \fIString\fP
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.br
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A file listing devices that LVM should use.
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The file must exist in /etc/lvm/devices/ and is managed
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with the lvmdevices(8) command.
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This overrides the lvm.conf devices/devicesfile and
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devices/use_devicesfile settings.
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.ad b
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.HP
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.ad l
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\fB--driverloaded\fP \fBy\fP|\fBn\fP
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.br
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If set to no, the command will not attempt to use device-mapper.
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For testing and debugging.
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.ad b
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.HP
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.ad l
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\fB-h\fP|\fB--help\fP
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.br
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Display help text.
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.ad b
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.HP
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.ad l
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\fB--lockopt\fP \fIString\fP
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.br
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Used to pass options for special cases to lvmlockd.
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See \fBlvmlockd\fP(8) for more information.
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.ad b
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.HP
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.ad l
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\fB--longhelp\fP
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.br
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Display long help text.
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.ad b
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.HP
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.ad l
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\fB--nolocking\fP
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.br
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Disable locking.
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.ad b
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.HP
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.ad l
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\fB--profile\fP \fIString\fP
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.br
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An alias for --commandprofile or --metadataprofile, depending
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on the command.
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.ad b
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.HP
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.ad l
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\fB-q\fP|\fB--quiet\fP ...
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.br
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Suppress output and log messages. Overrides --debug and --verbose.
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Repeat once to also suppress any prompts with answer 'no'.
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.ad b
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.HP
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.ad l
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\fB-t\fP|\fB--test\fP
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.br
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Run in test mode. Commands will not update metadata.
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This is implemented by disabling all metadata writing but nevertheless
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returning success to the calling function. This may lead to unusual
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error messages in multi-stage operations if a tool relies on reading
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back metadata it believes has changed but hasn't.
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.ad b
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.HP
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.ad l
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\fB--update\fP
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.br
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Update the content of the devices file.
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.ad b
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.HP
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.ad l
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\fB-v\fP|\fB--verbose\fP ...
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.br
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Set verbose level. Repeat from 1 to 4 times to increase the detail
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of messages sent to stdout and stderr.
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.ad b
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.HP
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.ad l
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\fB--version\fP
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.br
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Display version information.
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.ad b
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.HP
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.ad l
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\fB-y\fP|\fB--yes\fP
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.br
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Do not prompt for confirmation interactively but always assume the
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answer yes. Use with extreme caution.
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(For automatic no, see -qq.)
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.ad b
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.SH VARIABLES
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.HP
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\fIString\fP
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.br
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See the option description for information about the string content.
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.HP
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\fISize\fP[UNIT]
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.br
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Size is an input number that accepts an optional unit.
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Input units are always treated as base two values, regardless of
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capitalization, e.g. 'k' and 'K' both refer to 1024.
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The default input unit is specified by letter, followed by |UNIT.
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UNIT represents other possible input units: \fBbBsSkKmMgGtTpPeE\fP.
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b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB,
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m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB.
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(This should not be confused with the output control --units, where
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capital letters mean multiple of 1000.)
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.SH ENVIRONMENT VARIABLES
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See \fBlvm\fP(8) for information about environment variables used by lvm.
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For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
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.SH SEE ALSO
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.BR lvm (8)
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.BR lvm.conf (5)
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.BR lvmconfig (8)
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.BR lvmdevices (8)
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.BR pvchange (8)
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.BR pvck (8)
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.BR pvcreate (8)
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.BR pvdisplay (8)
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.BR pvmove (8)
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.BR pvremove (8)
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.BR pvresize (8)
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.BR pvs (8)
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.BR pvscan (8)
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.BR vgcfgbackup (8)
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.BR vgcfgrestore (8)
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.BR vgchange (8)
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.BR vgck (8)
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.BR vgcreate (8)
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.BR vgconvert (8)
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.BR vgdisplay (8)
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.BR vgexport (8)
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.BR vgextend (8)
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.BR vgimport (8)
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.BR vgimportclone (8)
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.BR vgimportdevices (8)
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.BR vgmerge (8)
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.BR vgmknodes (8)
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.BR vgreduce (8)
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.BR vgremove (8)
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.BR vgrename (8)
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.BR vgs (8)
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.BR vgscan (8)
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.BR vgsplit (8)
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.BR lvcreate (8)
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.BR lvchange (8)
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.BR lvconvert (8)
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.BR lvdisplay (8)
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.BR lvextend (8)
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.BR lvreduce (8)
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.BR lvremove (8)
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.BR lvrename (8)
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.BR lvresize (8)
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.BR lvs (8)
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.BR lvscan (8)
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.BR lvm-fullreport (8)
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.BR lvm-lvpoll (8)
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.BR lvm2-activation-generator (8)
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.BR blkdeactivate (8)
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.BR lvmdump (8)
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.BR dmeventd (8)
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.BR lvmpolld (8)
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.BR lvmlockd (8)
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.BR lvmlockctl (8)
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.BR cmirrord (8)
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.BR lvmdbusd (8)
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.BR lvmsystemid (7)
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.BR lvmreport (7)
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.BR lvmraid (7)
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.BR lvmthin (7)
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.BR lvmcache (7)
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