SCF Reference Manual for the Storage Subsystem (G06.28+, H06.05+, J06.03+)

NOTE: This attribute is not valid for the PROFILE object.
Use this attribute only if you understand SMF architecture and know how to restore consistency
between the system configuration database and the SMF catalogs. The Softdoc for the T1083
product describes several inconsistencies and the procedures for reconciling them.
KEYALGORITHM,
specifies the encryption key algorithm on a disk. Valid values are XTS-AES and CBC-AES
This attribute changes the encryption key for a disk (single drive) while that drive is DOWN.
Its mirror may be UP. The disk volume will be online if the mirror is UP. The drive is initialized.
The drive’s volume label is left blank. If data needs to be copied from the other mirror, you
must start the REVIVE manually after the INITIALIZE command.
You must specify a path.
NOTE: This attribute is not valid for the ADD DISK command and the PROFILE object.
KEYSIZE
specifies the key size for the key algorithm for an encrypted disk. Valid value is 256.
NOTE: This attribute is not valid for the ADD DISK command and the PROFILE object.
LABEL $vol
writes a volume label on a newly formatted disk (or on both halves of a mirrored volume) or
relabels a previously labeled volume and erases all existing files
NOTE: This attribute is not valid for the PROFILE object.
Before using this attribute, carefully review all cautions and considerations in “Naming a Disk”
(page 88). Refer to the procedure for the LABEL attribute, “Changing the Volume Name and
Alternate Volume Name” (page 88).
LKIDLONGPOOLLEN number
is the memory (in 128-kilobyte units) to be allocated for lock key space. This space stores keys
larger than 16 bytes when records in key-sequenced files are locked. number is in the range
0 through 512. A value of 0 causes DP2 to default to an internal default value.
LKTABLESPACELEN number
is the memory (in 128-kilobyte units) to be allocated for lock-related data structures. The memory
available for these structures limits the total file and record locks allowed on the disk. number
is in the range 0 through 512. A value of 0 causes DP2 to default to an internal default value.
MAXLOCKSPEROCB number
is the maximum records that can be locked outside a transaction. number is in the range 0
through 1,000,000. The default is 5000.
You can increase the value of this attribute while the disk is in the STARTED state. However,
to decrease the value of this attribute, the disk must be in the STOPPED state. As a result, this
attribute value cannot be decreased for the system disk unless you load the system from a saved
system configuration database that contains a smaller value for this attribute.
Using large values for MAXLOCKSPEROCB can have a noticeable performance impact. The
volume may become non-responsive for several seconds or more, based on how many locks
are acquired during a transaction. The impact becomes significant when more than 100,000
locks are being released, and becomes larger in direct relationship to MAXLOCKSPEROCB.
Delays may vary between 2 seconds for 150,000 locks to 20 seconds for 500,000. During
this time, other applications or system processes may experience timeouts due to the extended
response time of the volume. Applications should avoid obtaining 100,000 or more locks
within a transaction on a regular basis.
ADD Command 205