HP ProLiant BL660c Configuring Arrays on HP Smart Array Controllers Reference - Page 44

Splitting a mirrored array, Recombining a split mirrored array, Access Control (SSP) tasks

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Splitting a mirrored array 1. Run the ACU GUI in offline mode. See "Configuring a server using ACU located on the SmartStart CD (on page 26)." 2. At the Configuration screen, select the appropriate controller from the Controller/Device menu. 3. From the Systems and Devices tree, select the appropriate array. 4. In the Available Tasks panel, click Split Mirrored Array. 5. Click OK. 6. When ACU finishes splitting the array, two logical drives appear in the Systems and Devices tree. 7. Shut down the OS. 8. Power down the server. 9. With power off, remove the physical drives that constitute one of the new arrays. If you do not remove the physical drives for one of the arrays, the OS will be unable to distinguish between the two arrays when the server is restarted, because the arrays are identical. 10. Power up the server. 11. Restart the OS. Recombining a split mirrored array 1. Run the ACU GUI in offline mode. See "Configuring a server using ACU located on the SmartStart CD (on page 26)." 2. At the Configuration screen, select the appropriate controller from the Controller/Device menu. 3. From the Systems and Devices tree, select the array to use as the source array. 4. In the Available Tasks panel, click Re-Mirror Array. 5. Select the array to be mirrored to the source array. This array is usually the array that was split from the original mirrored array. However, it can be any other array of the correct size. 6. Click OK. 7. When ACU finishes re-mirroring the array, restart the OS. The controller uses the rebuild process to synchronize the mirrored drives. The hard drive online LED flashes during the rebuild process. Depending on the hard drive size and the server load, this process can take up to 2 hours. You can boot the OS during this time, but the logical drive is not fault-tolerant until the rebuild is complete. Access Control (SSP) tasks To determine if a storage system controller supports SSP, see the storage system user guide. SSP enables you to determine which host controllers, or initiators, can access which particular logical drives on a storage system array controller, or target. This feature prevents data corruption that can occur when different servers with different operating systems access the same data. SSP enables multiple servers to share logical drives connected to the same target. SSP functionality is enabled or disabled at the target level. Administrators can name the connections between the initiators and the targets to help identify user groups for access privileges. HP Array Configuration Utility 44

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HP Array Configuration Utility
44
Splitting a mirrored array
1.
Run the ACU GUI in offline mode. See "Configuring a server using ACU located on the SmartStart
CD (on page
26
)."
2.
At the Configuration screen, select the appropriate controller from the Controller/Device menu.
3.
From the Systems and Devices tree, select the appropriate array.
4.
In the Available Tasks panel, click
Split Mirrored Array
.
5.
Click
OK
.
6.
When ACU finishes splitting the array, two logical drives appear in the Systems and Devices tree.
7.
Shut down the OS.
8.
Power down the server.
9.
With power off, remove the physical drives that constitute one of the new arrays.
If you do not remove the physical drives for one of the arrays, the OS will be unable to distinguish
between the two arrays when the server is restarted, because the arrays are identical.
10.
Power up the server.
11.
Restart the OS.
Recombining a split mirrored array
1.
Run the ACU GUI in offline mode. See "Configuring a server using ACU located on the SmartStart
CD (on page
26
)."
2.
At the Configuration screen, select the appropriate controller from the Controller/Device menu.
3.
From the Systems and Devices tree, select the array to use as the source array.
4.
In the Available Tasks panel, click
Re-Mirror Array
.
5.
Select the array to be mirrored to the source array.
This array is usually the array that was split from the original mirrored array. However, it can be any
other array of the correct size.
6.
Click
OK
.
7.
When ACU finishes re-mirroring the array, restart the OS.
The controller uses the rebuild process to synchronize the mirrored drives. The hard drive online LED
flashes during the rebuild process. Depending on the hard drive size and the server load, this
process can take up to 2 hours. You can boot the OS during this time, but the logical drive is not
fault-tolerant until the rebuild is complete.
Access Control (SSP) tasks
To determine if a storage system controller supports SSP, see the storage system user guide.
SSP enables you to determine which host controllers, or initiators, can access which particular logical
drives on a storage system array controller, or target. This feature prevents data corruption that can occur
when different servers with different operating systems access the same data.
SSP enables multiple servers to share logical drives connected to the same target. SSP functionality is
enabled or disabled at the target level. Administrators can name the connections between the initiators
and the targets to help identify user groups for access privileges.