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 specified 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  con-
	      fig-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 output.

       --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 compliant 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 compliant 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)