HP XP External Storage Software - Manual (Page 137)

Restarting external arrays and restoring NAS Blade systems
1. Turn the external array power supply on. For instructions, see Topowerexternalarrayson .
2. Confirm that the external array's status is normal.
3. Execute the Check Paths & Restore Vol. command using External Storage XP to restore the path
to the external array. For instructions, see
Checking the connection status and resuming external
LU operations (Check Paths & Restore Vol.) .
4. Confirm that the connection between the local array and the external array is normal.
5. Start NAS OS 1 (NAS channel adapter's OS) and NAS OS 2 using LUN Manager.
NOTE:
The NAS OS can also be started from the SVP. To start the NAS OS from the SVP, contact
your HP account support representative.
6. If you deleted Business Copy XP or Continuous Access XP pairs as you stopped the external array,
re-create the deleted pairs.
7. Start the cluster using NAS Blade Manager.
8. Resume access from the client.
Recovery procedures for errors in external arrays
This section describes recovery procedures for when an error occurs in the NAS Blade system's external
array.
Errors in an external array's disk
Figure 62 shows an example of when an error occurs in an external array's disk. The situation in
Figure 62 is as follows:
• Data itself stored in the error disk in external array 1 cannot be restored. To restore data to the
original disk after recovering the NAS Blade system, the data should have been backed up in a
disk other than the error disk.
• Clients cannot access volumes in the error disk. Clients can only access volumes other than the
error disk.
• The local array recognizes that the status of the file system and volume in the error disk is blocked.
External Storage XP user guide for the XP12000, XP10000, SVS200 137