NonStop S-Series Hardware Installation and FastPath Guide (G06.29+)

Performing Post-Startup Tasks
HP NonStop S-Series Hardware Installation and FastPath Guide—541880-002
9-10
Test the Communications Lines
g. Return the preferred paths and the primary processor for this disk to their
original states by entering the following commands. Wait for the SCF prompt to
appear before you enter each command:
->PRIMARY DISK $DATA00, 0
->SWITCH $DATA00-P
(Enter this command only if you are testing a mirrored disk.)
->SWITCH $DATA00-M
Use the STATUS DISK $DATA00 command to check that the preferred paths
and primary processor have returned to their original states. Compare with the
example in Step 3.
5. Use the BAD attribute of the SCF INFO DISK command to check each disk for bad
sectors. The following example checks for bad sectors on a disk named $DATA00:
->INFO DISK $DATA00, BAD
If you detect bad sectors, use the SCF CONTROL DISK, SPARE command to
replace them. For more information, see the SCF Reference Manual for the
Storage Subsystem.
6. If you must replace a disk drive, see the NTL Support and Service Library Service
Procedures>NonStop S-Series Hardware Servicing>Replacing an Internal Disk
Drive CRU.
Test the Communications Lines
For information about testing communications lines, see the manual specific to the
appropriate communications line.
Caution. Using the CONTROL DISK, SPARE command can cause inconsistent data if
processing is taking place when you issue the command. It is recommended that you stop all
processing on the volume before issuing the CONTROL DISK, SPARE command, especially
when sparing bad sectors on a system disk while one half of the volume is down.