HP StoreOnce D2D4324 HP StoreOnce VSA user guide (TC458-96002, July 2013) - Page 73

Recovering a Source Appliance (NAS shares), Reverse replication using the wizard

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Page 73 highlights

Recovering a Source Appliance (NAS shares) There are two ways of recovering NAS shares mappings after a disaster. • Reverse replication using the wizard (page 73) • Promotion of Target share over the WAN (page 77) IMPORTANT: If you replace the disks in the source StoreOnce Backup system and keep the original appliance, the source to target mapping will still exist on the repaired StoreOnce Backup system. You MUST break this mapping BEFORE carrying out recovery. If you do not, the now blank Source Share (on the replacement disks) will overwrite the data on the Target Share. You will effectively lose backup data on both Source and Target Shares. Reverse replication using the wizard In this example, the remote site has lost both the host servers and the StoreOnce Backup system. New hardware has been purchased and installed and the administrator now wants to recover data to the StoreOnce Backup system and then restore to the host server. Before the failure a mapping existed between a Source Share on the remote site StoreOnce Backup system and a Target Share on the Data Center StoreOnce Backup system. After the failure the Source Share is missing; the mapping may or may not still exist. 1. Create a new Non-Replicating Share on the Source Appliance (by using the NAS Shares page). 2. Reverse seed the first full restore. The simplest way to do this is to use a USB disk, as described below. It is also possible to recover across the WAN, but this may place an unacceptable load on bandwidth or time availability. It is possible to reverse seed the first full restore using a USB disk, as follows: • Map from the host at the target site to the NAS share on the HP StoreOnce Backup system and copy the share to a USB disk attached to the host. • Transport the media to the Replication Source site and attach it to a host. • Map from a host at the source site to the new share on the Replication Source and copy across the data from the USB disk before running the Recovery wizard. NAS Mappings (Replication) 73

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Recovering a Source Appliance (NAS shares)
There are two ways of recovering NAS shares mappings after a disaster.
•
Reverse replication using the wizard (page 73)
•
Promotion of Target share over the WAN (page 77)
IMPORTANT:
If you replace the disks in the source StoreOnce Backup system and keep the
original appliance, the source to target mapping will still exist on the repaired StoreOnce Backup
system. You MUST break this mapping BEFORE carrying out recovery. If you do not, the now blank
Source Share (on the replacement disks) will overwrite the data on the Target Share. You will
effectively lose backup data on both Source and Target Shares.
Reverse replication using the wizard
In this example, the remote site has lost both the host servers and the StoreOnce Backup system.
New hardware has been purchased and installed and the administrator now wants to recover
data to the StoreOnce Backup system and then restore to the host server. Before the failure a
mapping existed between a Source Share on the remote site StoreOnce Backup system and a
Target Share on the Data Center StoreOnce Backup system. After the failure the Source Share is
missing; the mapping may or may not still exist.
1.
Create a new Non-Replicating Share on the Source Appliance (by using the NAS Shares
page).
2.
Reverse seed the first full restore. The simplest way to do this is to use a USB disk, as described
below. It is also possible to recover across the WAN, but this may place an unacceptable
load on bandwidth or time availability.
It is possible to reverse seed the first full restore using a USB disk, as follows:
•
Map from the host at the target site to the NAS share on the HP StoreOnce Backup system
and copy the share to a USB disk attached to the host.
•
Transport the media to the Replication Source site and attach it to a host.
•
Map from a host at the source site to the new share on the Replication Source and copy
across the data from the USB disk before running the Recovery wizard.
NAS Mappings (Replication)
73