Disabled aggregates when there are no z/OS V1R13 or later systems

When there are no z/OS® V1R13 or later systems in the shared file system environment, if the compatibility mode aggregate becomes disabled because of an I/O error or corruption, unmount the file system and any other file systems that are mounted below the disabled aggregate. Note that the z/OS UNIX shell unmount command (/usr/sbin/unmount) might query the status of the file system before unmounting it. Because the file system is disabled, this query will fail which, in turn, might cause the entire unmount to fail. Therefore, you might need to use the TSO/E UNMOUNT command or the operator command MODIFY BPXOINIT,FILESYS=UNMOUNT,FILESYSTEM=filesysname to unmount the disabled file system. If you do not unmount before running ioeagslv, the system issues messages similar to those shown in Disabled aggregates when some systems are on z/OS V1R13 or later.

Run the ioeagslv utility to ensure that the aggregate is internally consistent. When you are satisfied that the aggregate is in a consistent state, mount the aggregate.

If you choose not to run ioeagslv, you still need to unmount and mount the aggregate so that it will not remain disabled. If there are file systems that are mounted below the disabled aggregate, you can use the remount capability of z/OS UNIX to avoid unmounting those lower file systems. Remount allows you to change a mounted file system from read-only to read/write, from read/write to read-only, or keep the same mode (read to read and write to write) without affecting lower mounted file systems.

For example. if PLEX.JMS.AGGR001.LDS0001 is mounted read/write at /zfsmnt1, you can keep the mount read/write, using one of the following methods:

Enter the following TSO/E UNMOUNT command:

UNMOUNT FILESYSTEM('PLEX.JMS.AGGR001.LDS0001') REMOUNT(SAMEMODE)

Enter the following z/OS UNIX chmount command:
```
/usr/sbin/chmount -s /zfsmnt1
```

Use the Work with Mounted File Systems ISHELL panel:

.-----------------------------------------------------------------------. 
|                    Select the attribute to change                     | 
|                                                                       | 
| Select the attribute to change:                                       | 
|     1.  Change mount mode to R/O                                      | 
|     2.  Change Owning system from SY1                                 | 
|     3.  Change automove attribute...                                  | 
|     4.  Remount Samemode (R/W)                                        | 
|                                                                       | 
| New owning system    ________                                         | 
|                                                                       | 
|                                                                       | 
|                                                                       | 
|                                                                       | 
|  F1=Help       F3=Exit       F6=Keyshelp  F12=Cancel                  | 
'-----------------------------------------------------------------------'

You can use the df -v command to determine if your file system is mounted and whether it is mounted read-only or read/write. For more information about these commands, see the topics on UNMOUNT and chmount in z/OS UNIX System Services Command Reference.