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Linux 2.6 - man page for scsi_id (linux section 8)

SCSI_ID(8)			   Linux Administrator's Manual 		       SCSI_ID(8)

NAME
       scsi_id - retrieve and generate a unique SCSI identifier

SYNOPSIS
       scsi_id [options]

DESCRIPTION
       scsi_id	queries  a SCSI device via the SCSI INQUIRY vital product data (VPD) page 0x80 or
       0x83 and uses the resulting data to generate a  value  that  is	unique	across	all  SCSI
       devices that properly support page 0x80 or page 0x83.

       If  a result is generated it is sent to standard output, and the program exits with a zero
       value. If no identifier is output, the program exits with a non-zero value.

       scsi_id is primarily for use by other utilities such as udev that require  a  unique  SCSI
       identifier.

       By  default  all devices are assumed black listed, the --whitelisted option must be speci-
       fied on the command line or in the config file for any useful behaviour.

       SCSI commands are sent directly to the device via the SG_IO ioctl interface.

       In order to generate unique values for either page 0x80 or page 0x83, the  serial  numbers
       or world wide names are prefixed as follows.

       Identifiers  based  on  page  0x80 are prefixed by the character 'S', the SCSI vendor, the
       SCSI product (model) and then the the serial number returned by page 0x80. For example:

       # /lib/udev/scsi_id --page=0x80 --whitelisted --device=/dev/sda
       SIBM	3542	       1T05078453

       Identifiers based on page 0x83 are prefixed by the identifier type followed  by	the  page
       0x83 identifier. For example, a device with a NAA (Name Address Authority) type of 3 (also
       in this case the page 0x83 identifier starts with the NAA value of 6):

       # /lib/udev/scsi_id --page=0x83 --whitelisted --device=/dev/sda
       3600a0b80000b174b000000d63efc5c8c

OPTIONS
       --blacklisted
	      The default behaviour - treat the device as black listed, and do nothing	unless	a
	      white listed device is found in the scsi_id config-file.

       --device=device
	      Send SG_IO commands to device, such as /dev/sdc.

       --config=config-file
	      Read  configuration  and	black/white list entries from config-file rather than the
	      default /etc/scsi_id.config file.

       --whitelisted
	      Treat the device as white listed. The --whitelisted option must be specified on the
	      command  line or in the scsi_id configuration file for scsi_id to generate any out-
	      put.

       --page=0x80|0x83|pre-spc3-83
	      Use SCSI INQUIRY VPD page code 0x80, 0x83, or pre-spc3-83.

	      The default behaviour is to query the available VPD pages, and  use  page  0x83  if
	      found, else page 0x80 if found, else nothing.

	      Page  pre-spc3-83 should only be utilized for those scsi devices which are not com-
	      pliant with the SPC-2 or SPC-3 format for page 83.  While this option is	used  for
	      older  model 4, 5, and 6 EMC Symmetrix devices, its use with SPC-2 or SPC-3 compli-
	      ant devices will fallback to the page 83 format supported by these devices.

       --replace-whitespace
	      Reformat the output : replace all whitespaces by underscores.

       --export
	      Export all data in KEY=<value> format used to import in other programs.

       --verbose
	      Generate verbose debugging output.

       --version
	      Display version number and exit.

FILES
       /etc/scsi_id.config
	      Configuration of black/white list entries and per device options:
	      # one config per line, short match strings match longer strings
	      # vendor=string[,model=string],options=<per-device scsi_id command line options>
	      vendor="ATA",options=-p 0x80

SEE ALSO
       udev(7)

AUTHORS
       Developed by Patrick Mansfield <patmans@us.ibm.com> based on SCSI ID  source  included  in
       earlier linux 2.5 kernels, sg_utils source, and SCSI specifications.

					  December 2003 			       SCSI_ID(8)


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