Powering arrays on or off – HP StorageWorks XP Remote Web Console Software User Manual
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Powering arrays on or off
This section describes procedures for powering local and external arrays on or off after XP External
Storage operations have started.
This section explains the following:
•
“Commands for Turning On or Off Only an External Array” (page 25)
•
Powering local arrays on or off
•
•
“Turning On or Off Power Supply of Both local and external arrays” (page 27)
CAUTION:
To power both the local and external arrays off, first power off the local array, and
then power off the external array.
CAUTION:
To power both the local and external arrays on, first power on the external array,
and then power on the local array.
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
.
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
.
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 arrays on or off
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