HP D2D .HP D2D Backup System user guide (EH985-90907, March 2011) - Page 138

Restoring single files, Restore and deduplication

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2. When the backup application prompts for access to the NAS share, provide the IP address of the StoreOnce Backup System. Restoring single files This is very easy and fast. Run your backup software and select the files to be restored. Even when restoring from virtual tape devices, where the software application is tape-based, the restore performance on your HP StoreOnce Backup System is much faster than restoring from physical tape. Restore and deduplication With data deduplication the actual restore time from disk is longer because the data chunks must be reconstructed. However, because more data can be stored on the disk, restore is still fast because there is no need to retrieve data from archived physical media. Reconnecting to the to iSCSI VTL devices after host failure Each configured library or tape drive on the HP StoreOnce Backup System is uniquely mapped to a host. It cannot be seen by any other host on the network. If the host system fails, you must replace it and reconfigure the mapping of the host to the configured backup device on the HP StoreOnce Backup System. 1. Install the operating system on the host. If possible, give the host the same Computer Name as the host that failed. 2. Install the backup application on the host. 3. Run the iSCSI Initiator on the restored host. (See also the HP StoreOnce Backup System Installation and Configuration Guide.) 138 Restore processes without replication

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2.
When the backup application prompts for access to the NAS share, provide the IP address of
the StoreOnce Backup System.
Restoring single files
This is very easy and fast. Run your backup software and select the files to be restored. Even when
restoring from virtual tape devices, where the software application is tape-based, the restore
performance on your HP StoreOnce Backup System is much faster than restoring from physical tape.
Restore and deduplication
With data deduplication the actual restore time from disk is longer because the data chunks must be
reconstructed. However, because more data can be stored on the disk, restore is still fast because
there is no need to retrieve data from archived physical media.
Reconnecting to the to iSCSI VTL devices after host failure
Each configured library or tape drive on the HP StoreOnce Backup System is uniquely mapped to a
host. It cannot be seen by any other host on the network. If the host system fails, you must replace it
and reconfigure the mapping of the host to the configured backup device on the HP StoreOnce Backup
System.
1.
Install the operating system on the host. If possible, give the host the same
Computer Name
as
the host that failed.
2.
Install the backup application on the host.
3.
Run the iSCSI Initiator on the restored host. (See also the
HP StoreOnce Backup System Installation
and Configuration Guide
.)
Restore processes without replication
138