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

Storage Subsystem Commands
SCF Reference Manual for the Storage Subsystem—529937-007
14-40
ADD PROFILE Command
PROGRAM [[$vol.]subvol.]fileid
is the object file name of the IOP. If not specified, PROGRAM is:
$SYSTEM.SYSTEM.TSYSDP2
If you specify PROGRAM as $SYSTEM.SYSTEM, the operating system first
searches for the file on $SYSTEM.SYSTEM and on the current SYSnn
subvolume.
PROTECTDIRECTORY { CHECKPOINT | OFF | SERIAL }
is the type of protection to use for the disk volume directory:
REVIVEBLOCKS number
is the number of revive blocks to be copied during each copy interval when the disk
is being revived. This value cannot exceed the maximum transfer size allowed by
the controller that is reviving the disk. number is in the range 1 through 292. The
default is 1.
REVIVEINTERVAL number
is the interval (in 10-millisecond units) between copy operations when the disk is
being revived. number is in the range 1 (10 milliseconds) through 32767 (more
than 5 minutes). The default is 100 units (1 second).
The minimum value is 0, and the maximum value is 100. The default value is 0,
which causes DP2 to use its internal default of 50.
SERIALWRITES { ENABLED | DISABLED }
(mirrored volumes only) specifies whether serial writes are used when updating
files.
CHECKPOINT Use a full-block checkpoint to protect directory writes.
OFF Do not perform special write protection of the directory.
SERIAL A write to the directory also results in a serial write to the
mirror disk, if available. If the mirror disk is not available, a
full-block checkpoint writes the directory. (Default)
ENABLED Perform serial writes if the mirror disk is available. If the primary
or mirror disk is not available, and if FULLCHECKPOINTS
(page 14-36) is ENABLED or FORCED, full-block checkpoints
protect the validity of the data. ENABLED minimizes potential data
loss caused by certain processor error conditions. (Default)
DISABLED Do not perform serial writes unless this attribute has been
specified for a specific file and the mirror disk is available.
DISABLED maximizes the performance of mirrored disks.