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

NOTE: This attribute is only valid for 514 byte per sector disks:
• internal SCSI disks in S-series enclosures
• 45xx disks in modular disk subsystems
DP2 ignores this attribute for 512-byte-sector disks:
• disks in an FCDM disk drive enclosure
• ESS disks in an Enterprise Storage array
• SAS disks in an MSA70 or M8390-12CG disk enclosure
HALTONERROR number
specifies whether an internally detected, unrecoverable, disk-process error forces a halt (code
%11500) in the primary processor, backup processor, or both. Forced processor halts also
halt the respective disk process. Forced processor halts can provide more information at the
time of a failure. To force a halt when a failure is detected, set number to either 2, 3, or 4.
number is one of:
Never halt a processor (default).
No processor halts, and the primary or backup disk process that detects an unrecoverable disk-process error
can go into the STOPPED state, substate DOWN.
1
Never halt the backup processor.
The primary processor halts, but the backup disk process can go into the STOPPED state, substate DOWN,
if it detects an unrecoverable disk-process error.
2
Never halt the primary processor.
The backup processor halts, but the primary disk process can go into the STOPPED state, substate DOWN
if it detects an unrecoverable disk-process error.
3
Allow both processors to halt.
Both the primary and backup processors can halt if either detects an unrecoverable disk-process error.
4
If an unrecoverable disk-process error is detected but the processor is not halted, the disk
processes perform these actions:
• If the backup disk process detects the error, the disk state remains unchanged and the
backup disk process goes into a “soft down” state but does not halt. The primary disk
process continues to function without an active backup.
• If the primary disk process detects the error, it gives ownership of the disk to the backup
disk process. If the ownership change is successful, the primary disk process becomes a
soft-down backup (the process is not available). If the ownership change is unsuccessful,
the disk volume goes into the STOPPED state, substate DOWN.
• If both processes enter a soft-down state, the volume enters the STOPPED state, substate
DOWN.
• To restore the backup disk process:
1. Issue a RESET DISK command to ensure that all paths start.
2. Issue a START DISK command to reactivate the backup disk process.
3. If the RESET or START command fails, you must reload the backup processor.
HIGHPIN { ON | OFF }
specifies whether the IOP can run at a high PIN (ON, the default) or only at a low PIN (OFF).
IGNOREINCONSISTENCY
specifies that a command can create an inconsistency between the system configuration
database and the SMF catalogs maintained by the SMF manager process, storage pools, and
virtual disks.
204 Storage Subsystem Commands