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14 © December 2004, ADIC
Fibre Channel Guidelines
The following guidelines exist for AMASS running with fibre channel.
HP-UX Fibre
For AMASS users in a HP-UX fibre environment connected to a PathLight 5000 SNC, the environment
variable: AMASS_PLSNK should be used.
A known error condition exists where the first SCSI test-unit-ready sent to the device is never received but
rather absorbed by the PathLight and a SCSI bus reset status returned. The detected presence of this
environmental variable in the UNIX shell will cause AMASS to respond correctly to this condition. This
environmental variable can be set in the shell in which AMASS is started or put directly in the amass_start
script.
Solaris Fibre
AMASS supports fibre on the Sun Solaris platform. When installing AMASS, the AMASS juke driver may be
unable to attach to fiber attached drives and libraries. If you have this problem, please call ATAC for
assistance.
SGI IRIX 6.5 Fibre
AMASS uses symbolic links (/dev/rjuke1, /dev/rj1d1..) that are mapped to system device files.
For example: /dev/rjuke1 ->/hw/scsi/sc7d510
However, the AMASS install process may have trouble creating symbolic links for fibre devices attached to
a fabric under IRIX 6.5.14 and later. For instance, after entering the desired controller, target, and Logical
Unit Number (LUN), you might receive the following error message.
Failed to build a path to the device for you.
Please enter the explicit device path:
To find the explicit device path, use the following steps. You can also use the same steps to determine the
explicit device path for other fibre devices. This example tries to determine the device path for the first device
listed in Step 1.
Fabric Tape: node 1000006045170ad2 port 2001006045170ad2, lun 2 on SCSI
controller 8: unknown
1 Perform an hinv system call.
# hinv | grep -i tape
Fabric Tape: node 1000006045170ad2 port 2001006045170ad2, lun 2 on SCSI
controller 8: unknown
Fabric Tape: node 1000006045170ad2 port 2001006045170ad2, lun 4 on SCSI
controller 8: unknown
Fabric Tape: node 1000006045170ad2 port 2001006045170ad2, lun 6 on SCSI
controller 8: unknown
Fabric Tape: node 1000006045170ad2 port 2001006045170ad2, lun 8 on SCSI
controller 8: unknown
2 Look at the contents of the /dev/scsi or /hw/scsi directories and match the output from the hinv
system call for the desired device.
Note
Make sure that if this environment variable is being used to set it in the shell
before amassbackup and amassrestore are executed.