Disabled aggregates when some systems are on z/OS V1R13 or later

The following information applies when some systems are on z/OS® V1R13 or later. Start of change If a compatibility mode aggregate becomes disabled, zFS attempts to automatically re-enable the disabled aggregate. End of change It either requests that another system in the shared file system environment take over the aggregate (if it is sysplex-aware) or it attempts an internal remount samemode. This action should recover the aggregate and it will no longer be disabled.

Generally, an aggregate that has become disabled (unless it was due to a planned activity, such as an vary offline of a device) should be salvaged by using the ioefsutl salvage utility at your earliest convenience. Because zFS has detected a problem, there is a chance that the file system is corrupted, even if it has been successfully re-enabled. If the file system can be taken offline (unmounted) immediately or at a regularly-scheduled time, you should do so and run salvager. However, if the file system is a critical production file system that cannot be easily unmounted, you will have to use judgment considering the inconvenience of unmounting the file system against the risk of continuing to use a file system that may possibly be corrupted. When the file system is backed up according to your installation's regular schedule, you might be backing up a corrupted file system; if this continues, you might lose any previous backed-up versions of the file system that were not corrupted. In this case, you may want to arrange to salvage the first backup copy of the file system after it was disabled and re-enabled.

To run the ioefsutl salvage utility, you must first unmount the aggregate. The z/OS UNIX shell unmount command (/usr/sbin/unmount) may query the status of the file system before unmounting it. Because the file system is disabled, this query will fail which, in turn, may cause the entire unmount to fail. Therefore, you might need to use the TSO/E UNMOUNT command or the operator MODIFY BPXOINIT,FILESYS=UNMOUNT,FILESYSTEM=filesysname command to unmount the disabled file system. If you do not unmount before running ioefsutl salvage the system issues messages, such as the following one:

IKJ56225I DATA SET PLEX.JMS.AGGR001.LDS0001 ALREADY IN USE, TRY LATER+
IKJ56225I DATA SET IS ALLOCATED TO ANOTHER JOB OR USER
IOEZ00003E While opening minor device 1, could not open dataset
PLEX.JMS.AGGR001.LDS0001.

After you run the ioefsutl salvage utility and are satisfied that the aggregate is in a consistent state, mount the aggregate again.