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
SEL state
specifies that the command affects only devices in the specified state.
SUB [ { ALL | MAGNETIC } ]
specifies that the command affects only disks of the specified type.
attribute-spec
is one or more CONTROL DISK Attributes.
CONTROL DISK Attributes
[ , CHECKSUM [ % | %H ] lsa ]
[ , POWER { ON | OFF } ]
[ , POWEROFF ]
[ , POWERON ]
[ , REBUILDDFS ]
[ , REFRESH ]
[ , REPLACEBOOT [[$vol.]subvol.]fileid ]
[ , SPARE [ % | %H ] lsa [ , FORCED ] ]
CHECKSUM [s% | %H ] lsa
(magnetic disks only) reads the specified sector, recomputes the sector checksum
value for specified portions of a disk volume, and writes the sector back to disk
again. (By comparison, FUP CHECKSUM recomputes the block checksum.)
CHECKSUM corrects the checksum value for a disk address, even if the address
is not within a file. This attribute is normally used only by a service provider.
Close all files, but leave the disk in the started state, before you issue this
command. Because the checksum operation can leave data on the volume in an
inconsistent state, SCF asks you to verify the request. Report the original error
message (that prompted you to use the checksum operation) to your service
provider.
POWER { ON | OFF }
powers a disk drive on or off. Specifying ON powers the disk drive on. Specifying
OFF 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.
[ % | %H ] lsa Is the logical sector address of the first sector of the disk
portion whose checksum is to be calculated. The logical
sector address can be expressed as an octal (%),
hexadecimal (%H), or decimal number.
Note. You cannot turn the power on or off for M8xxx disks with this attribute.