HP NonStop NS manual Recovery Operations for Disk Drives, These SCF commands control Disk objects

Disk Drives: Monitoring and Recovery Recovery Operations for Disk Drives

Recovery Operations for Disk Drives

These SCF commands control DISK objects:

Command	Description
ABORT	Terminates the operation of a disk drive immediately, leaving it in the
	STOPPED state, HARDDOWN substate.
ALTER	Changes attribute values for a storage device.
BYPASS	Bypasses one or more disks in a Fibre Channel disk-drive enclosure.
CONTROL	Issues disk-specific commands.
PRIMARY	For a disk drive, causes the backup processor to become the primary
	processor and the primary processor to become the backup processor.
RENAME	Changes the name of a disk drive.
RESET	Puts a disk drive in a state from which it can be restarted.
START	Initiates the operation of a disk drive.
STOP	Terminates the operation of a disk drive in a normal manner.
SWITCH	Switches paths to a disk drive.

For more information, see the SCF Reference Manual for the Storage Subsystem.

Table 10-3. Common Recovery Operations for Disk Drives (page 1 of 2)

Problem	Recovery
Free-space	Use the Disk Compression Program (DCOM) to consolidate disk space.
fragmentation	See Disk Compression Program (DCOM) on page B-2.
Disk full	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-2and
	Disk Space Analysis Program (DSAP) on page B-2.
Down disk or	Recovery Operations for a Down Disk or Down Disk Path on page 10-14
disk path
Defective	If you are authorized, use the SCF CONTROL DISK, SPARE command to
sectors	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.

HP Integrity NonStop NS-Series Operations Guide—529869-005

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