Service Procedure; Assess Shutdown Of File System <= Customer Task; Shutdown The File System <= Customer Task - IBM Power 775 Manual

3 SERVICE PROCEDURE

STOP – Do not proceed unless you have read
"Safety Notices" which is available from InfoCenter; see Section 1.3.
3.1 Assess shutdown of file system <= CUSTOMER TASK
STEP 1 The customer must assess whether all client applications can be stopped at this time and whether the Global
Parallel File System (GPFS) can be shut down at this time.
This procedure requires powering off a Disk Enclosure, which under most conditions, if the file system is active,
will result in putting the file system into panic and making it unavailable. While it is technically possible to drain
all the data from a Disk Enclosure before shutting it down and leave the file system active for this procedure, it is
assumed impractical due to the excessive time required to move all the data.
For more details, see related document "GPFS Native RAID Administration and Programming Reference", which
can be found in InfoCenter.
If all client applications can be stopped and if GPFS can be shut down, proceed to STEP 2.
If you cannot stop the applications and file system at this time, you must wait to perform this procedure until a
time when the file system can be shut down. The Disk Enclosure will continue to operate as long as at least 8 fans
are operational. If enough fans fail, the Disk Enclosure can overheat and shut down which will most likely result
in file system panic.
3.2 Shutdown the file system <= CUSTOMER TASK
STEP 2 Stop all client applications.
STEP 3 Shut down GPFS. Wait for complete shutdown before proceeding to STEP 4.
Power775 Disk Enclosure Fan Service Procedure
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