Checking The Connection Status And Resuming External Lu Operations (Check Paths & Restore Vol.); Restoring All External Lus In An External Disk Array (Check Paths & Restore Vol.); Restoring External Lus Individually (Check Paths & Restore Vol.) - HP StorageWorks User Manual

CAUTION: To access the external LU after executing the Disconnect Subsystem command, you must
execute the Check Paths & Restore Vol. command.
Checking the connection status and resuming external LU operations (Check Paths
& Restore Vol.)
When errors occur in the path between the local disk array and external disk array, and also in all
alternate paths, the local disk array changes the external LU's status to Blockade. In this case, see
"Troubleshooting External Storage
according to the troubleshooting procedure. Execute the Check Paths & Restore Vol. command to make the
external LU in Blockade status usable.
When executing the Check Paths & Restore Vol. command for the disconnected external LU for which
mapping settings are preserved, the defined mapping setting and the external LU's current status are
compared and checked to see if the settings match the actual status. The path status and all other mapping
configuration definitions are checked. If the external LU can be resumed as a mapped volume as a result of
the checking processing, the volume status is set to be available for I/O operations.
Use the Check Paths & Restore Vol. command to resume using an external LU that has been disconnected
using the Disconnect Subsystem or Disconnect Volume command.
CAUTION: After executing the Check Paths & Restore Vol. command, click the Refresh button (
Command View XP or XP Remote Web Console main pane to update the information, and check the
current progress status.
NOTE: If you execute the Check Paths & Restore Vol. command and the external LU is ready to be
restored as the mapped LU, the external LU is set to accept I/Os and you can resume using the external LU
as a mapped LU. However, if the external LU is not ready to be resumed, the status of the disconnected
volume remains Blockade.
Use the following procedures to restore disconnected external LUs:
• "Restoring all external LUs in an external disk array (Check Paths & Restore
• "Restoring external LUs individually (Check Paths & Restore
Restoring all external LUs in an external disk array (Check Paths & Restore Vol.)
1. In the LU Operation pane, select External Devices in the Device tree.
Physically connected external disk arrays appear in the Device list.
2. In the Device list, right-click the external disk array you want to restore the connection to the local disk
array, and select Check Paths & Restore Vol.
The selected external disk array appears in blue italics in the LU list and Device list. It also appears in
the Preset list. To check setting details, right-click the setting in the Preset list, and select Detail. To
cancel settings, right-click the setting in the Preset list, and select Delete.
3. Click Apply. A confirmation message appears.
4. Click OK.
The path status in the Path Setting pane changes to Checking. When External Storage XP finishes
checking path status and the external disk array can be restored, the Status column changes to
Normal. If the external disk array cannot be restored, the status changes to Blockade.
Restoring external LUs individually (Check Paths & Restore Vol.)
1. In the LU Operation pane, select an external LU group number in the Device tree.
Information about external LUs in the selected external LU group appears in the Device list.
XP" on page 95 and restore the path to the external disk array
Vol.)" on page 87
Vol.)" on page 87
External Storage XP user guide
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