SCF Reference Manual for the Storage Subsystem (G06.24+, H06.03+)

Storage Subsystem Commands
SCF Reference Manual for the Storage Subsystem—529937-007
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CONTROL DISK Command
POWEROFF
powers the disk drive off. All paths to the disk drive (-P and -B or --M and -MB)
must be in a STOPPED state before you can use this command option. When you
use this attribute, you can specify only the -P path or the-M path.
POWERON
powers the disk drive on. All paths for the disk drive (-P and -B or -M and -MB)
must be in a STOPPED state before you can use this command option. When you
use this attribute, you can specify only the -P path or the-M path.
REBUILDDFS
(magnetic disks only) rebuilds the disk free-space table.
REFRESH
(magnetic disks only) writes to disk the dirty (changed) cache pages for nonaudited
files and dirty file control blocks. You should issue a CONTROL DISK, REFRESH
command before:
•
Shutting the system down.
•
Backing up open disk files to tape (when the application must be kept running).
Do a refresh when no transactions are taking place on the system. When the
files are backed up, the file labels more accurately represent the state of the
files that are backed up. Back up audited files with the TMF Online Dump to
ensure data consistency.
The time a refresh operation takes depends on the amount of disk cache
containing dirty pages in use at the time. Writing to disk can take several minutes.
During this time all other disk I/O is suspended, which means that applications can
time out waiting for the refresh operation to finish.
REPLACEBOOT $SYSTEM.SYSnn.SYSDISC
(magnetic disks only) replaces the disk system-load bootstrap program.
$SYSTEM.SYSnn.SYSDISC is the location of the disk bootstrap program. SCF
creates the temporary work file ZSYSDISC.ZSCFDISC during the REPLACEBOOT
operation, installs the bootstrap program in a reserved area, and when the
operation is finished, purges the ZSYSDISC.ZSCFDISC file.
When you use this attribute, you cannot specify a path.
Note. You cannot turn the power off for M8xxx disks with this attribute.
Note. You cannot turn the power on for M8xxx disks with this attribute.
Note. The REPLACEBOOT attribute does not apply to Integrity NonStop NS-series servers.
Instead, the bootstrap program is installed through firmware update into flash memory.