HP ProLiant 1500 SMART-2DH Array Controller Reference Guide - Page 172

G-4 Recovering from Drive Failure Replacing a Failed Drive Failed drives in hot-pluggable trays can be removed and replaced while host system and storage system power are both ON. Hot-pluggable drives can also be replaced when the power is OFF. Remember, however, to NEVER TURN OFF an external storage system while the host system power is on. This would result in the failure of all drives in the storage system, which would likely compromise your fault tolerance. When a hot-pluggable drive is inserted, all disk activity on the controller will be temporarily paused while the drive is spinning up (usually 20 seconds or so). If the drive is inserted while power is ON, in fault-tolerant configurations, recovery of data on the replacement drive will automatically begin (indicated by blinking online LED). Non-hot-pluggable drives should only be replaced while the system power is OFF. On all non-hot-pluggable drives, be sure to check the SCSI ID jumpers to make sure that the correct drive is being replaced. To prevent compromising the fault tolerance, it is imperative that the correct physical drive be replaced. Also, be sure that the SCSI ID jumpers are set to the same SCSI ID on the replacement drive. Note that the SCSI ID jumpers may be located at different places on different drive models, but it is imperative that the SCSI ID on the replacement drive always be set to the same value as the original failed drive to prevent SCSI ID conflicts which could compromise the fault tolerance. The capacity of replacement drives must be at least as large as the capacity of the other drives in the array. Drives that are insufficient capacity will immediately be failed by the controller without starting the Automatic Data Recovery. CAUTION: If the SMART-2DH Array Controller has a failed drive, replace this drive with a new or known-good replacement drive. In some cases, a drive that has previously failed by the controller may appear to be operational after the system is power-cycled, or after removal and reinsertion of a hot-pluggable drive. However, this practice is highly discouraged as the use of such "marginal" drives may eventually result in data loss. Writer: Pamela King Project: SMART-2DH Array Controller Reference Guide Comments: 295469-002 File Name: N-APPG.DOC Last Saved On: 2/27/98 12:09 PM COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED