HP StoreOnce D2D4324 HP D2D25xx, 41xx and 43xx Backup System user guide (EH985 - Page 100

Promoting a Target Library over the WAN using iSCSI

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Promoting a Target Library over the WAN using iSCSI The remote site has lost both the host servers and the StoreOnce system. New server hardware has been purchased and installed and the admin now wants to recover data to the server. The admin has not installed a new StoreOnce Backup System and is going to recover data directly to the server from the Data Center StoreOnce Backup System over the WAN (which will take a long time). NOTE: The procedure described below retains the ability to back up to the Target Library. If this is not required, a simpler solution may be to make the Target Library visible (but read-only), see Backup applications and Replication Target libraries (page 16). Figure 9 Recovery by promoting a Target Library Before the failure a mapping existed between a Source Library on the remote site StoreOnce Backup System and a Target Library on the Data Center StoreOnce Backup System. After the failure the mapping still exists but the Source Library is missing. The Target Library on the Data Center StoreOnce Backup System is still in Target Library mode, it has not had its mappings removed. IMPORTANT: This recovery method is not suitable if the Target Library also has slot mappings from Source Libraries on other remote sites. 1. On the Target Appliance in the Data Center, go to the Replication - Mapping Configuration page, select the Target Library and remove the slot mapping between it and the lost Source Library. 2. As long as there is only one slot mapping to the Target Library, it will become a Non-Replicating Library. NOTE: If there are other mappings, do not remove them if it will break other library replication. Do not proceed, this method is not suitable. 3. Edit the port configuration of the newly promoted Non-Replicating Library to make it iSCSI. 4. Install the iSCSI initiator on the host machine at the remote site where recovery is to occur and install the backup application. 5. Configure the iSCSI Initiator Name for the newly promoted Non-Replicating Library to be that of the host system. 6. Connect to the Data Center appliance and library via iSCSI from the host at the remote site. 7. Import the cartridges into the backup application and recover the data over the WAN. 100 Restore processes with replication

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Promoting a Target Library over the WAN using iSCSI
The remote site has lost both the host servers and the StoreOnce system. New server hardware
has been purchased and installed and the admin now wants to recover data to the server. The
admin has not installed a new StoreOnce Backup System and is going to recover data directly to
the server from the Data Center StoreOnce Backup System over the WAN (which will take a long
time).
NOTE:
The procedure described below retains the ability to back up to the Target Library. If this
is not required, a simpler solution may be to make the Target Library visible (but read-only), see
Backup applications and Replication Target libraries (page 16)
.
Figure 9 Recovery by promoting a Target Library
Before the failure a mapping existed between a Source Library on the remote site StoreOnce
Backup System and a Target Library on the Data Center StoreOnce Backup System. After the failure
the mapping still exists but the Source Library is missing. The Target Library on the Data Center
StoreOnce Backup System is still in Target Library mode, it has not had its mappings removed.
IMPORTANT:
This recovery method is not suitable if the Target Library also has slot mappings
from Source Libraries on other remote sites.
1.
On the Target Appliance in the Data Center, go to the
Replication - Mapping Configuration
page, select the Target Library and remove the slot mapping between it and the lost Source
Library.
2.
As long as there is only one slot mapping to the Target Library, it will become a Non-Replicating
Library.
NOTE:
If there are other mappings, do not remove them if it will break other library
replication. Do not proceed, this method is not suitable.
3.
Edit the port configuration of the newly promoted Non-Replicating Library to make it iSCSI.
4.
Install the iSCSI initiator on the host machine at the remote site where recovery is to occur and
install the backup application.
5.
Configure the iSCSI Initiator Name for the newly promoted Non-Replicating Library to be that
of the host system.
6.
Connect to the Data Center appliance and library via iSCSI from the host at the remote site.
7.
Import the cartridges into the backup application and recover the data over the WAN.
100
Restore processes with replication