HP StorageWorks XP Remote Web Console Software - Manual (Page 32)

Commands for Turning On or Off Only an External Array
When you turn on or off the power supply of only external array while the power supply of XP12000
Disk Array keeps on, you need to execute the following XP External Storage Software commands.
The procedures below will utilize the following commands:
• Disconnect Subsystem
Execute the Disconnect Subsystem command from the XP Command View Advanced Edition Software
or Remote Web Console GUI when you need to perform maintenance or stop the local or external
array. This command stops acceptance of all host I/O operations to the external LU mapped as
the internal LDEV. All outstanding data in cache memory on the local array intended for the external
LU is written (destaged) to the external LU.
For instructions on executing the Disconnect Subsystem command, see
Disconnecting external arrays
or LUs .
NOTE:
To disconnect an individual LU, use the Disconnect Volume command. To delete a single external
LU's mapping, use the Disconnect Volume command and then the Delete LU command. For
instructions, see
Deleting external LU mappings (Delete LU) .
• Check Paths & Restore Vol.
This command checks if defined information about the mapped external LU and the actual external
LU status match. If the external LU can be used as the mapped local array volume, the external
LU is set to accept I/O, and you can continue using the external LU as a mapped LU.
Use this command to restore the external LU, which is set to reject host I/O operations by the
Disconnect Subsystem or Disconnect Volume command, as the mapped volume. You can execute
the Check Paths & Restore Vol. command for the entire array or an individual LU.
If an error occurs in the external storage path such that the command fails, correct the error so the
path can be restored, and execute the Check Paths & Restore Vol. command again.
For instructions, see
Checking the connection status and resuming external LU operations (Check
Paths & Restore Vol.) .
NOTE:
When executing the Check Paths & Restore Vol. command, if the external LU is ready to be
restored as the mapped LU, the external LU is set to Available. However, if the external LU is not
ready to be restored, the external LU status remains as Blocked.
Powering local arrays on or off
To power local arrays off
CAUTION:
When you want to turn off both the local array and the external array, you first need turn off the local
array, and then turn off the external array.
Preparing for XP External Storage operations 32