Removal and Replacement Procedures
HP StorageWorks Modular Smart Array 500 System Maintenance and Service Guide
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HP CONFIDENTIAL
Codename: Aurora Part Number: 251850-004 Last Saved On: 9/19/03 10:57 AM
HP StorageWorks Modular Smart Array 500 Controller
When the MSA500 controller in a single-controller system fails, HP recommends that you
migrate the cache module to a new controller. Battery-backed cached data in a failed
controller can remain intact for up to 3 days with 256-MB modules or up to 4 days with
128-MB modules.
CAUTION:
Failure to migrate the cache to a new controller and flush the data can result in
loss of the data that is written in the cache but was unable to be written to the hard drives
before controller failure.
To remove the component:
1
2
To restore the data:
1. Remove the cache modules from the failed controller. Refer to “Battery-Backed Cache
Module” in this chapter.
2. Install the cache modules in the new controller.
3. Install the new controller and allow the cache to write the stored data.
To replace the controller:
1. Slide the controller into the bay until it locks into place.
2. Close the lever.
3. Verify that the controller is seated properly by observing the controller LEDs. When
seated properly, the LEDs illuminate when the system is powered.