Dell Emulex Family of Adapters - Manual (Page 833)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
FC and FCoE Driver Configuration
833
information elements to build the unique ID. The following are examples of each
scenario.
FC Tape Device Examples
The following examples use the scsi_id command to retrieve and generate a unique
SCSI identifier:
scsi_id [options]
For these examples, the following [options] are used:
 -g
Treats the device as white listed. It is needed on the command line or
in the scsi_id.config file for the scsi_id command to generate any output. In
the examples, the -g option is needed on the command line because the
vendor and model for this tape device were not in the /etc/scsi_id.config
file.
 -s
Generates an id for the sysfs-device. Note that “-s” is an invalid option
for scsi_id version 147.
Note: Since the [options] can vary depending on the version of the scsi_id
command, see the scsi_id man page on your system for the correct and
complete list of the [options].‘
The following example is an FC tape device using the SCSI generic driver (sg) rather
than the SCSI tape driver. The value returned has a leading prefix of 3, which is the
NAA type. The remaining digits represent the FC controller’s WWPN.
scsi_id -g -s /sys/class/scsi_generic/sg0
350060b000029b592
The following example is an FC tape device using the SCSI tape driver. The value
returned is the same as the previous example.
scsi_id -g -s /sys/class/scsi_tape/nst0
350060b000029b592
The following example uses a different FC tape vendor. Notice that the value returned
is similar to the previous examples, with respect to the leading digit and the WWPN.
/sbin/scsi_id -g -s sys/class/scsi_tape/nst0
35005076300015101
FC-SCSI Tape Device Example
The following is an example of a FC controller with multiple SCSI tape devices behind
it (FC-SCSI tape device). When the Emulex driver is loaded, the SCSI mid-level
discovers the SCSI tape devices as follows:
scsi scan: INQUIRY to host 14 channel 0 id 0 lun 0
scsi: unknown device type 12
Vendor: ADIC Model: SNC 4000 Rev: 42d4
Type: RAID ANSI SCSI revision: 03
Attached scsi generic sg5 at scsi14, channel 0, id 0, lun 0, type 12
scsi scan: INQUIRY to host 14 channel 0 id 0 lun 1
Vendor: ADIC Model: Scalar 24 Rev: 227A