EMC Legato NetWorker Commands Reference

relem

SYNOPSIS

       relem [ -a b.t.l ] [ -fvtb ] [ -m {0|1|2} ] [ -r eladdr.nel ] [ -l ]

DESCRIPTION

       The relem program will send a READ ELEMENT STATUS command to all chang-
       ers, or (with the -a option) to the named device.

SIMPLE OPTIONS

       -a b.t.l
              Selects a specific ordinal SCSI address, where b is the  logical
              SCSI  bus,  t is the SCSI target, and l is the SCSI logical unit
              number (LUN) on that target. See libscsi(1).

       -f     generates full output (somewhat verbose).

       -v     generates very verbose output.

       -t     causes volume tags, if present, to be printed.

       -b     causes the returned element status data to be dumped as hexadec-
              imal codes rather than interpreted.

       -l     Performs a complete LUN search for all SCSI adapters in the sys-
              tem when performing Autodetection.   This argument  is  accepted
              on  all  systems, but does not have any effect on HP-UX systems.
              Due to the method used to scan for available  devices  on  HP-UX
              systems, all accessible devices are shown, and the -l option has
              no additional effect.  On all other systems, checking starts  at
              LUN  0 for SCSI devices.  The first empty LUN found will end the
              search for a given target ID.  With the -l option, LUNS  on  all
              target  IDs  for  all  SCSI busses in the system are checked for
              jukeboxes.  This can take a very long time and  should  only  be
              used  when  necessary.  For example, a Fibre Channel adapter can
              support 126 target IDs, each of which may have 80 or more  LUNs.
              Checking  all  LUNs on this single adapter may take over 10 min-
              utes.

METHOD OPTIONS

       -m 0   all element status data is fetched in one call

       -m 1   element status data is fetched per element type (e.g., all drive
              elements are read at once, then all slot elements, etc.)

       -m 2   element  data  is  fetched  per  element  (which  is the default
              method)

       The SCSI specification allows each of the previous methods of  fetching
       element data.

       Note: some changers have defects with respect to fetching element data.
       For example, one changer may be accurate when reporting all elements of
              number  of  elements of status to read.  Use changers to get the
              particular addresses used by your changer.

SEE ALSO

       libscsi (1)

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