An aggregate can become disabled for many reasons, such as:

• An I/O error or failure of a DASD device
• Loss of connectivity to a DASD device
• An internal zFS error
• Permanent corruption of the aggregate

The procedure to re-enable the aggregate varies, depending on the release level of zFS running in the shared file system environment:

• When some systems are running z/OS® V1R13 or later, see Disabled aggregates when some systems are on z/OS V1R13 or later.
• When no systems are running z/OS V1R13 or later, see Disabled aggregates when there are no z/OS V1R13 or later systems.