Restoring the File System

The instructions in this section cover the tasks involved in restoring the file system after an upgrade.

How to Verify the mcf File

1. Issue the sam-fsd command.
2. Examine the output for errors, as follows:

   • If the mcf file is free of syntax errors, the sam-fsd output is similar to that shown in the following example. The output contains information about the file systems and other system information.

     # sam-fsd
      Trace file controls:
      sam-amld      off
      sam-archiverd off
      sam-catserverd off
      sam-fsd       off
      sam-rftd      off
      sam-recycler  off
      sam-sharefsd  off
      sam-stagerd   off
      sam-serverd   off
      sam-clientd   off
      sam-mgmt      off

   • If the mcf file contains syntax or other errors, the errors are shown in the output.

     If your mcf file has errors, see mcf(4) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual about how to create this file correctly.

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   Note - If you change the mcf file after the Sun QFS file system is in use, you must convey the new mcf specifications to the Sun QFS software. For information about propagating mcf file changes to the system, see the Sun QFS File System 5.3 Configuration and Administration Guide.

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How to Modify the /etc/vfstab File

Perform this task if you modified the /etc/vfstab file in Unmounting File Systems.

1. Open the /etc/vfstab file.
2. Change the Mount at Boot field for all Sun QFS file systems from no to yes or delay.

How to Reinitialize and Restore the File System

In this task, you reinitialize the file systems and restore the saved data in the new file systems. This task completes the process initiated in Backing Up Existing File Systems.

1. Issue the samfsinfo command and examine the output.

   The output lists the DAU size that was specified with the sammkfs command when the file system was created. You will use this DAU size again in the next step.

2. Use the sammkfs command to initialize a new Sun QFS file system.

   The following example command initializes a file system named qfs1 with a DAU size of 512 kilobytes:

   # sammkfs -a 512 qfs1

   For more information about the options to the sammkfs command, see sammkfs(1M) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.

3. Use the qfsrestore command to restore the dumped data in the new file system.

   For following example restores a file system named qfs1 (mounted at /qfs1) from files dumped to qfs1.bak, which existed outside of the Sun QFS file system. In this case, you would issue the following commands:

   # cd /qfs1
   # qfsrestore -f /save/qfs/qfs1.bak

How to Check the File System

Perform this task if you did not reinitialize and restore the file system as described in How to Reinitialize and Restore the File System.

• Use the samfsck command to check each existing file system for inconsistencies.

  For more information, see samfsck(1M) in Sun QFS and Sun Storage Archive Manager 5.3 Reference Manual.