McDATA ULTRANET EDGE 3000, User Manual

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13
Troubleshooting and Diagnostics
13-15
Troubleshooting FC/SCSI Tape Pipelining (Device Extension)
This command issues an inquiry to all devices listed in the
UltraNet Edge 3000’s FC/SCSI Tape Pipelining LUN map. The
output from this command lists which devices the UltraNet
Edge Storage Router can access.
c. Run the
ttag luns
command again.
The information obtained from the inquiry (
ttag probe
) will
now be included in the UltraNet Edge 3000’s FC/SCSI Tape
Pipelining LUN map.
5. Are the devices mapped in the correct order in the UltraNet Edge
3000’s FC/SCSI Tape Pipelining LUN map?
NOTE: In most cases, the order of the devices does not matter. If you’re
trying to re-order the devices through a FC-SCSI bridge, see step in this
section.
a. Run the
ttag luns
command to inspect the UltraNet Edge
3000’s FC/SCSI Tape Pipelining LUN map.
b. If reordering is required, issue the
ttag wwnPurg 2 all
command.
This command removes all dynamically discovered entries
from the table.
c. Issue the
ttag wwnDisp
command to display the list of
purged entries.
d. Issue the
ttag wwnRel 2 x
command where x is the entry
listed in the purged entries table to be placed in the UltraNet
Edge 3000’s FC/SCSI Tape Pipelining LUN map at LUN 1.
e. After an entry is removed from the purged entries table, issue
the
ttag wwnDisp
command to display the new purged
entries table.
f. Continue issuing the
ttag wwnDisp
and
ttag wwnRel 2 x
commands until the LUN map is complete.
g. This LUN map is automatically saved to disk.
The
ttag wwnPurg 2 x
command only temporarily removes
entries from the LUN map. These entries may be included
back in the LUN map after the UltraNet Edge 3000 reboots. To
permanently remove an entry from the LUN map, issue the