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124 lines
3.7 KiB
Groff
124 lines
3.7 KiB
Groff
.TH SCSI_ID 8 "December 2003" "" "Linux Administrator's Manual"
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.SH NAME
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scsi_id \- retrieve and generate a unique SCSI identifier
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.SH SYNOPSIS
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.BI scsi_id
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[\fIoptions\fP]
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.SH "DESCRIPTION"
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.B scsi_id
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queries a SCSI device via the SCSI INQUIRY vital product data (VPD) page 0x80 or
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0x83 and uses the resulting data to generate a value that is unique across
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all SCSI devices that properly support page 0x80 or page 0x83.
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If a result is generated it is sent to standard output, and the program
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exits with a zero value. If no identifier is output, the program exits
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with a non\-zero value.
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\fBscsi_id\fP is primarily for use by other utilities such as \fBudev\fP
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that require a unique SCSI identifier.
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By default all devices are assume black listed, the \fB\-\-whitelisted\fP option must
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be specified on the command line or in the config file for any useful
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behaviour.
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SCSI commands are sent directly to the device via the SG_IO ioctl
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interface.
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In order to generate unique values for either page 0x80 or page 0x83, the
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serial numbers or world wide names are prefixed as follows.
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Identifiers based on page 0x80 are prefixed by the character 'S', the SCSI
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vendor, the SCSI product (model) and then the the serial number returned
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by page 0x80. For example:
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.sp
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.nf
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# /lib/udev/scsi_id \-\-page=0x80 \-\-whitelisted \-\-device=/dev/sda
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SIBM 3542 1T05078453
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.fi
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.P
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Identifiers based on page 0x83 are prefixed by the identifier type
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followed by the page 0x83 identifier. For example, a device with a NAA
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(Name Address Authority) type of 3 (also in this case the page 0x83
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identifier starts with the NAA value of 6):
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.sp
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.nf
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# /lib/udev/scsi_id \-\-page=0x83 \-\-whitelisted \-\-device=/dev/sda
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3600a0b80000b174b000000d63efc5c8c
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.fi
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.P
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.SH OPTIONS
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.TP
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.BI \-\-blacklisted
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The default behaviour \- treat the device as black listed, and do nothing
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unless a white listed device is found in the scsi_id config\-file.
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.TP
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.BI \-\-device=\| device\^
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Send SG_IO commands to \fBdevice\fP, such as \fB/dev/sdc\fP.
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.TP
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.BI \-\-config=\| config\-file
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Read configuration and black/white list entries from
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.B config\-file
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rather than the default
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.B /etc/scsi_id.config
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file.
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.TP
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.BI \-\-whitelisted
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Treat the device as white listed. The \fB\-\-whitelisted\fP option must be specified
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on the command line or in the scsi_id configuration file for
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.B scsi_id
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to generate any output.
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.TP
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.BI \-\-page=\| 0x80 | 0x83 | pre-spc3-83
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Use SCSI INQUIRY VPD page code 0x80, 0x83, or pre-spc3-83.
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.sp
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The default
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behaviour is to query the available VPD pages, and use page 0x83 if found,
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else page 0x80 if found, else nothing.
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.sp
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Page pre-spc3-83 should only be utilized for those scsi devices which
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are not compliant with the SPC-2 or SPC-3 format for page 83. While this
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option is used for older model 4, 5, and 6 EMC Symmetrix devices, its
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use with SPC-2 or SPC-3 compliant devices will fallback to the page 83
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format supported by these devices.
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.TP
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.BI \-\-replace-whitespace
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Reformat the output : replace all whitespaces by underscores.
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.TP
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.BI \-\-export
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Export all data in KEY=<value> format used to import in other programs.
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.TP
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.BI \-\-verbose
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Generate verbose debugging output.
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.TP
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.BI \-\-version
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Display version number and exit.
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.RE
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.SH ENVIRONMENT
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If the DEVPATH environment variable is set, scsi_id assumes it has been
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invoked via udev (or some other hotplug program), and all errors or
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warnings are sent using syslog.
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.P
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.SH "FILES"
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.nf
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.ft B
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.ft
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.TP
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\fI/etc/scsi_id.config\fP
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configuration and black/white list entries
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.RE
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.fi
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.LP
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.SH "SEE ALSO"
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.BR udev (7)
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.SH AUTHORS
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Developed by Patrick Mansfield <patmans@us.ibm.com> based on SCSI ID
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source included in earlier linux 2.5 kernels, sg_utils source, and SCSI
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specifications.
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