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144 lines
5.0 KiB
Groff
144 lines
5.0 KiB
Groff
.TH LVCHANGE 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
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.SH NAME
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lvchange \- change attributes of a logical volume
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.SH SYNOPSIS
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.B lvchange
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.RB [ \-\-addtag
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.IR Tag ]
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.RB [ \-A | \-\-autobackup
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.RI { y | n }]
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.RB [ \-a | \-\-available
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.RI [ e | l ]{ y | n }]
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.RB [ \-\-alloc
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.IR AllocationPolicy ]
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.RB [ \-C | \-\-contiguous
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.RI { y | n }]
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.RB [ \-d | \-\-debug ]
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.RB [ \-\-deltag
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.IR Tag ]
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.RB [ \-\-resync ]
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.RB [ \-h | \-? | \-\-help ]
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.RB [ \-\-ignorelockingfailure ]
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.RB [ \-\-ignoremonitoring ]
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.RB [ \-\-monitor
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.RI { y | n }]
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.RB [ \-\-poll
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.RI { y | n }]
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.RB [ \-\-sysinit ]
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.RB [ \-\-noudevsync ]
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.RB [ \-M | \-\-persistent
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.RI { y | n }]
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.RB [ \-\-minor
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.IR minor ]
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.RB [ \-P | \-\-partial ]
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.RB [ \-p | \-\-permission
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.RI { r | rw }]
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.RB [ \-r | \-\-readahead
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.RI { ReadAheadSectors | auto | none }]
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.RB [ \-\-refresh ]
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.RB [ \-t | \-\-test ]
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.RB [ \-v | \-\-verbose]
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.I LogicalVolumePath
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.RI [ LogicalVolumePath ...]
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.SH DESCRIPTION
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lvchange allows you to change the attributes of a logical volume
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including making them known to the kernel ready for use.
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.SH OPTIONS
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See \fBlvm\fP(8) for common options.
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.TP
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.BR \-a ", " \-\-available " [" \fIe | \fIl ]{ \fIy | \fIn }
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Controls the availability of the logical volumes for use.
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Communicates with the kernel device-mapper driver via
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libdevmapper to activate (\-ay) or deactivate (\-an) the
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logical volumes.
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.IP
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If clustered locking is enabled, -aey will activate exclusively
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on one node and -aly will activate only on the local node.
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To deactivate only on the local node use -aln.
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Logical volumes with single-host snapshots are always activated
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exclusively because they can only be used on one node at once.
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.TP
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.BR \-C ", " \-\-contiguous " {" \fIy | \fIn }
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Tries to set or reset the contiguous allocation policy for
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logical volumes. It's only possible to change a non-contiguous
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logical volume's allocation policy to contiguous, if all of the
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allocated physical extents are already contiguous.
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.TP
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.B \-\-resync
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Forces the complete resynchronization of a mirror. In normal
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circumstances you should not need this option because synchronization
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happens automatically. Data is read from the primary mirror device
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and copied to the others, so this can take a considerable amount of
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time - and during this time you are without a complete redundant copy
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of your data.
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.TP
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.B \-\-minor \fIminor
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Set the minor number.
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.TP
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.BR \-\-monitor " {" \fIy | \fIn }
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Start or stop monitoring a mirrored or snapshot logical volume with
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dmeventd, if it is installed.
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If a device used by a monitored mirror reports an I/O error,
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the failure is handled according to
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\fBmirror_image_fault_policy\fP and \fBmirror_log_fault_policy\fP
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set in \fBlvm.conf\fP.
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.TP
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.BR \-\-poll " {" \fIy | \fIn }
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Without polling a logical volume's backgrounded transformation process
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will never complete. If there is an incomplete pvmove or lvconvert (for
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example, on rebooting after a crash), use \fB\-\-poll y\fP to restart the
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process from its last checkpoint. However, it may not be appropriate to
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immediately poll a logical volume when it is activated, use
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\fB\-\-poll n\fP to defer and then \fB\-\-poll y\fP to restart the process.
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.TP
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.B \-\-sysinit
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Indicates that \fBlvchange\fP(8) is being invoked from early system
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initialisation scripts (e.g. rc.sysinit or an initrd),
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before writeable filesystems are available. As such,
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some functionality needs to be disabled and this option
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acts as a shortcut which selects an appropriate set of options. Currently
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this is equivalent to using \fB\-\-ignorelockingfailure\fP,
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\fB\-\-ignoremonitoring\fP, \fB\-\-poll n\fP and setting
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\fBLVM_SUPPRESS_LOCKING_FAILURE_MESSAGES\fP
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environment variable.
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.TP
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.B \-\-noudevsync
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Disable udev synchronisation. The
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process will not wait for notification from udev.
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It will continue irrespective of any possible udev processing
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in the background. You should only use this if udev is not running
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or has rules that ignore the devices LVM2 creates.
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.TP
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.B \-\-ignoremonitoring
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Make no attempt to interact with dmeventd unless \fB\-\-monitor\fP
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is specified.
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Do not use this if dmeventd is already monitoring a device.
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.TP
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.BR \-M ", " \-\-persistent " {" \fIy | \fIn }
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Set to y to make the minor number specified persistent.
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.TP
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.BR \-p ", " \-\-permission " {" \fIr | \fIrw }
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Change access permission to read-only or read/write.
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.TP
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.BR \-r ", " \-\-readahead " {" \fIReadAheadSectors | \fIauto | \fInone }
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Set read ahead sector count of this logical volume.
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For volume groups with metadata in lvm1 format, this must
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be a value between 2 and 120 sectors.
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The default value is "auto" which allows the kernel to choose
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a suitable value automatically.
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"None" is equivalent to specifying zero.
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.TP
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.B \-\-refresh
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If the logical volume is active, reload its metadata.
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This is not necessary in normal operation, but may be useful
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if something has gone wrong or if you're doing clustering
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manually without a clustered lock manager.
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.SH Examples
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Changes the permission on volume lvol1 in volume group vg00 to be read-only:
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.sp
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.B lvchange -pr vg00/lvol1
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.SH SEE ALSO
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.BR lvm (8),
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.BR lvcreate (8),
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.BR vgchange (8)
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