HP StorageWorks XP Remote Web Console Software - Manual (Page 108)

108 Troubleshooting NAS Blade systems that include external arrays
Stopping external arrays
1. Stop access from the client.
2. Stop the cluster using NAS Blade Manager.
3. Delete all Business Copy XP or Continuous Access XP pairs, if you created the pairs specifying the
external LU.
4. Stop NAS OS 1 (NAS channel adapter’s OS) and NAS OS 2 using LUN Manager.
NOTE: The NAS OS can also be stopped from the SVP. To stop the NAS OS from the SVP, contact
your HP account support representative.
5. Disconnect the external array using External Storage XP. For instructions, see ” Disconnecting external
arrays or LUs ” on page 98.
6. Stop the external array. For instructions, see ” To power external arrays off ” on page 29.
Restarting external arrays and restoring NAS Blade systems
1. Turn the external array power supply on. For instructions, see ” To power external arrays on ” on
page 29.
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.) ” on page 100.
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 61 shows an example of when an error occurs in an external array’s disk. The situation in
Figure 61 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.