Turning Off the DC Power During an Emergency

Caution – Potential loss of data – An emergency shutdown of the storage array might not allow the server to complete its I/O to the storage array.

Note – Before turning off the power switches on a DC-powered tray you must disconnect the two-pole 20-amp circuit breaker.

Relocation Cautions

Use the following guidelines when relocating trays or drives from one storage array to another.

Caution – Potential data loss – Moving a array or array components that are configured as part of a volume group can result in data loss. To prevent data loss, always consult a Customer Support representative before relocating configured drives, controller trays or expansion trays.

Note – Trays in arrays can be connected to the DC power supply (–48 VDC). Before turning off any power switches on a DC-powered tray, you must disconnect the two- pole 20-amp circuit breaker.

Do not move controller trays or expansion trays that are part of a volume group configuration. If you must move array components, contact a Customer Support representative for procedures. A Customer Support representative might direct you to complete several tasks prior to undertaking the relocation. These tasks might include:

Creating, saving, and printing an array profile of each storage array that is affected by the relocation of a drive or tray.

Performing a complete backup of all data on the drives that you intend to move.

Verifying that the volume group and each of its associated volumes on the affected array have an Optimal status.

Determining the location and status of any global hot spares associated with the affected storage array.

96 Sun StorageTek 2500 Series Array Hardware Installation Guide • March 2007

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