NonStop NS-Series Operations Guide (H06.12+)

Recovery Operations for Disk Drives
These SCF commands control DISK objects:
DescriptionCommand
Terminates the operation of a disk drive immediately,
leaving it in the STOPPED state, HARDDOWN substate.
ABORT
Changes attribute values for a storage device.ALTER
Bypasses one or more disks in a Fibre Channel disk-drive
enclosure.
BYPASS
Issues disk-specific commands.CONTROL
For a disk drive, causes the backup processor to become
the primary processor and the primary processor to
become the backup processor.
PRIMARY
Changes the name of a disk drive.RENAME
Puts a disk drive in a state from which it can be restarted.RESET
Initiates the operation of a disk drive.START
Terminates the operation of a disk drive in a normal
manner.
STOP
Switches paths to a disk drive.SWITCH
For more information, see the SCF Reference Manual for the Storage Subsystem.
Table 10-3 Common Recovery Operations for Disk Drives
RecoveryProblem
Use the Disk Compression Program (DCOM) to
consolidate disk space. See Disk Compression Program
(DCOM) on page B-2.
Free-space fragmentation
1. Use DSAP to identify large, old, and little used files.
2. If you are authorized:
• Use the BACKUP utility to back up these disk files to
tape and then purge them from the disk. Do not purge
important system files.
• Move files to another disk. Do not move important
system files.
• Ask users to purge files.
For more information about these utilities, see BACKUP
on page B-2 and Disk Space Analysis Program (DSAP)
on page B-2.
Disk full
“Recovery Operations for a Down Disk or Down Disk
Path” (page 131)
Down disk or disk path
If you are authorized, use the SCF CONTROL DISK,
SPARE command to spare defective sectors. For
information on reinitializing the disk drive, see the SCF
Reference Manual for the Storage Subsystem.Disks come
formatted from HP. No disk format utility is available.
Return any disk that requires formatting to HP.
Defective sectors
130 Disk Drives: Monitoring and Recovery