Interstage Shunsaku Data Manager Management Console Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 -

3.2.1 Director Data Recovery

During operations, if a fault occurs at the disk to which the director data is allocated, Shunsaku posts message "shn30306u" to the director server event log.

Figure 3-2 shows an example of recovery if, during one day's operation, a fault occurs on the disk to which the director data is allocated.

[Figure 3-2 Director Data Recovery]

Figure 3-3 shows the recovery procedures to use for the director data.

Stop all applications before performing director data file recovery, and ensure that data searches and updates are not performed during recovery.

[Figure 3-3 Recovery Procedures for Director Data]

1. Check the system messages and determine the fault location.

   If a disk fault occurs during access to the directory containing the director data file, an error occurs for Shunsaku operations from the Shunsaku API or the Management Console. Check the Shunsaku messages posted to the director server event log to determine the cause of the error. If a disk fault occurred during access to the director data file directory, Shunsaku posts the following message:

   shn30306u: I/O error has occurred in director data file.
   file=filename System call=function-name errno=error-number (director)
   [director-identifier] Shunsaku System Name=Shunsaku-system-name

   Check this message to find the name of the disk where the fault occurred or the absolute pathname of the file.

2. Enter the shundrecover command b option to declare the start of recovery.

   If the director is stopped, use the shunsysstart command to start Shunsaku, then enter the shundrecover command.

   

   If the operating system needs to be restarted during disk replacement, restart the operating system, then perform Step 3 before this step. Ensure that all applications are stopped, start Shunsaku, and then perform this step.

   shundrecover -s director-identifier -b

3. Switch disks, and re-create the directory where the director data is allocated.
4. Use the operating system commands or the disk unit copy function to restore the director data from the backup data.

   copy command, or similar

5. Enter the shundrecover command e option and p option to declare the end of recovery.

   The recovery end declaration recovers the director data to its state at the time the backup was made.

   shundrecover -s director-identifier -e -p

• The director data that was backed up using the Management Console is used as the backup data during recovery by the shundrecover command.
• If director data has not been backed up, it cannot be recovered normally.
  If this is the case, use the following procedure to eliminate the cause of the I/O error with the director data file and then re-register lookup data:
  • Identify the location of the fault as described in step 1.
  • Stop Shunsaku.
  • Replace the disk and recreate the directory in which director data is located.
  • Restart Shunsaku.
  • Register lookup data.

  Refer to 1.3 Starting and Stopping Shunsaku for more information on how to start and stop Shunsaku. Refer to 1.4 Registering and Deleting Lookup Data for more information on how to register lookup data.

Refer to the Command Reference for details of the shundrecover command.