ETERNUS SF AdvancedCopy Manager Operator's Guide for Tape Backup Option 13.0 -Microsoft(R) Windows(R) 2000/Microsoft(R) Windows Sever(TM) 2003-, -Solaris-, -HP-UX-, -Linux-, -AIX-

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Chapter 13 Notes on Operations

This chapter explains notes on the Tape Backup operations of AdvancedCopy Manager.

13.1 Notes on Backup Operation

This section explains notes on the backup operation.

13.1.1 General Notes

For the general notes, see "Notes on Operations" in the "ETERNUS SF AdvancedCopy Manager Operator's Guide" for the operating system of the target Servers.

13.1.2 Notes on the Snapshot High-speed Backup

This sub-section explains notes on the snapshot high-speed backup.

+Number of Required Backup Volumes

The snapshot high-speed backup requires as many backup volumes as the number of specified generations. Thus, the snapshot backup is disabled if:

• All the specified number of generations have been backed up, and
• No new volume that can be used as a backup volume exists.

+Continuous Backup

Performing the snapshot high-speed backup continuously with the same transaction volume specified will perform the backup operation in parallel.
Performing the snapshot high-speed backup continuously more often than the number of preservation generations will cancel the backup operations starting from the oldest one. In other words, you cannot simultaneously perform the backup operation more often than the specified number of generations.

13.1.3 Notes on Synchronous High-speed Backup

This sub-section explains notes on synchronous high-speed backup.

+Backup Processing

The backup execution command cannot be executed before the transaction and backup volumes have become equivalency holding state.

+Backup Policy Setting

Backup policies can be set if the number of registered backup volumes is enough for snapshot high-speed backup operation even if the number is not enough for synchronous high-speed backup operation. In this event, synchronous high-speed backup may not be possible.

13.1.4 Notes on Restoration

This sub-section explains notes on restoration.

+Timing of Restoration

If data on a transaction volume has been rewritten since the latest backup data is collected to a backup volume and until restoration is performed, the rewritten data shall not be guaranteed.

[Figure 12.1 Notes on restoration of AdvancedCopy Manager]

13.1.5 Notes on SDX Object Operations

Note the following about the backup operation of SDX objects.

+Backup execution command (acmbackup)

Notes the following about operation with a SDX object in unit of slices

In the following cases, backup cannot be executed. In these cases, take appropriate action according to [System administrator's action] in the output message.
The SDX object does not satisfy the following conditions:

• The state of the mirror volume is ACTIVE.
• The state of the SDX disk is ENABLE.
• The state of the mirror slice is ACTIVE or TEMP.

In the following case, the preprocessing and postprocessing scripts are not executed:

• The state of the SDX object slice is TEMP.

+Restoration execution command (acmrestore)

Note the following about operation with an SDX object in units of slices.

If the transaction volume is a slice of an SDX object and it is not a single volume, restoration using this command cannot be performed. This is because Advanced Copy cannot be performed on a mirror volume.
For restoration to the transaction volume of an SDX object, follow the procedure below.

1. Confirm the backup volume by using the backup history list view/history information display command.
2. For restoration, use the dd command to copy data to the volume.

13.1.6 Notes on Restarting a Tape Library System 

A tape library system may be turned off while a tape is mounted. In this case, the tape and drive are disabled and become unusable the next time the tape library system is started.
This state can be confirmed by executing the TSM dsmadmc command and "query vol f=d" command. If "disabled" is displayed for the access status, the above state is confirmed.

For recovery, execute the following procedure:

1. Execute a TSM management client command.
   Execute the "dsmadmc" command.
2. Check whether the drive is disabled. If it is disabled, execute the following command.
   Execute the "q drive" command to check whether the drive is online.
3. If the drive is disabled (and "yes" is not displayed for the online state), execute the following command.
   "update drive library-name drive-name online=yes"
4. Confirm that the drive is enabled.
   Execute the "q drive" command to check whether the drive is online.
5. Check the tape status.
   Execute the "query vol f=d" command to check the access status.
6. If the tape is disabled, execute the following command to enable the tape.
   "update volume tape-name access=readwrite"
7. Confirm that the tape is enabled.
   Execute the "query vol f=d" command to check the access status.
   If the access status has returned to the read/write status, the tape is enabled.

13.2 Notes on the Web Window Environment

For the notes on the Web window environment, see "Setting up a client" in the "ETERNUS SF AdvancedCopy Manager User's Guide".

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