Promise Technology EX8650A, EX4650A user manual Automatic Transition, Manual Transition

Chapter 6: Technology Background

Automatic Transition

At this juncture, you would replace the failed drive in channel 2 with a new drive of the same or greater capacity.

When the SuperTrak controller detects the new drive in channel 2, it will:

•Transition the data from the drive in channel 4 to the drive in channel 2.

•Return the drive in channel 4 to spare status.

When the Transition is finished:

•The physical drives in channels 1 and 2 belong to the disk array.

•The physical drive in channel 3 is still unconfigured.

•The physical drive in channel 4 is a revertible spare drive.

The original configuration is restored.

Manual Transition

Manual transition requires an unassigned physical drive.

The example below is the same two-drive RAID 1 disk array as before.

•The physical drives in channels 1 and 2 belong to the disk array.

•The physical drive in channel 3 is unconfigured.

•The physical drive in channel 4 is a revertible spare drive.

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