Before you begin: You need to have a terminal that does not depend on TCP/IP, and the user ID doing the unmounts must be defined as UID(0) or have appropriate privileges under UNIXPRIV.

Perform the following steps to recover from file system problems with the root.

1. List the applications that are running. Issue:

   D OMVS,A=ALL

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2. Bring down all the processes listed, except for BPXOINIT.

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3. Make sure that all the processes except for BPXOINIT have been shut down. Issue:

   D OMVS,A=ALL

   The display will look like the following:

   BPXO040I 07.31.14 DISPLAY OMVS 017   
   OMVS     000E ACTIVE          OMVS=(65)
   USER       JOBNAME  ASID        PID       PPID STATE      START     CT_SECS
   IBMUSER  BPXOINIT   0013          1          0  MR---B     07.21.27     .034
   LATCHWAITPID=         0 CMD=BPXPINPR 
   SERVER=Init Process           AF=    0 MF=00000 TYPE=FILE

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4. Identify the file systems that are mounted.

   D OMVS,F

   Result: You will see a display that shows the mounted file systems.

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5. Unmount the file systems by using the TSO/E ISHELL command.

   Rule: The root file system must be unmounted last and you must use the IMMEDIATE option when unmounting the root file system. After the root has been unmounted, the mount table should show SYSROOT.

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6. Check the display again.

   D OMVS,F 

   Result: You should see a display similar to the following:

   BPXO044I 10.38.16 DISPLAY OMVS 054
   OMVS     000E ACTIVE          OMVS=(65)
   TYPENAME   DEVICE ----------STATUS----------- MODE QJOBNAME  QPID
   BPXFTCLN    0 ACTIVE                      RDWR
     NAME=SYSROOT
     PATH=/

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7. Follow your recovery actions for the root file system.

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8. Mount the root.

   Example: From TSO READY or ISPF Option 6, issue:

   MOUNT FILESYSTEM('your root dsname') TYPE(HFS) MOUNTPOINT('/') 

   Result: The root is mounted at / in read/write mode. If your root is read-only, add MODE(READ) to the MOUNT FILESYSTEM command.

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9. Mount the individual file systems at their respective mount points by using the TSO/E ISHELL command.

   Tip: To determine the output from the first D OMVS,F command, or the BPXPRMxx member that you IPL with.

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10. After the file systems are mounted (check by issuing D OMVS,F again), have a superuser (UID=0) enter the shell and issue /etc/rc from the prompt to run the shell initialization script.

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11. Follow your procedures to restart other applications (such as TCP/IP, NFS, FTP, and WebServer) and confirm that all functions are working.

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You know you are done when you have rebuilt the z/OS® UNIX environment and all functions are working.