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

Storage Subsystem Objects
SCF Reference Manual for the Storage Subsystem—529937-007
2-6
The DISK Object
Recovering From Various SCF Object States and Substates
This table describes how to prepare a disk for restarting. For all situations except
CONFIG-ERROR, the RESET command puts a disk into the STOPPED state, substate
DOWN, ready for a START command.
INACCESSIBLE Processor halts All paths to the processor are
down.
PREMATURE-
TAKEOVER
Improper
sequence of
commands
The backup disk process was
asked to take over for the primary
disk process before the backup
disk process had enough
information.
RESOURCE-
UNAVAILABLE
Resource is down
or in an
inaccessible state
The disk process could not obtain
a necessary resource.
UNKNOWN-
REASON
Communication
error
The disk process is unavailable for
an unknown reason.
SCF State SCF Substate Description Recovery
SERVICING SPECIAL The disk is reserved for
service.
Issue the RESET command.
SERVICING TEST The disk is reserved for
service.
Issue the RESET command.
STOPPED CONFIG-
ERROR
The disk is configured
improperly.
Reconfigure the disk
properly.
STOPPED HARDDOWN Caused by the ABORT
command or a hardware
error.
Issue the RESET command.
STOPPED PREMATURE-
TAKEOVER
The backup IOP was
asked to take over for the
primary IOP before it had
the proper information.
Issue the RESET, FORCED
command.
If this fails, reload the
processors.
STOPPED RESOURCE-
UNAVAILABLE
The IOP could not get a
necessary resource.
Issue the RESET, FORCED
command.
STOPPED UNKNOWN-
REASON
The IOP is down for an
unknown reason.
Issue the RESET, FORCED
command.
Table 2-1. Object States and Substates of Magnetic Disks (page 2 of 2)
State Substate Caused By Description