EMD Storage SecurStor 16i Spécifications télécharger pdf (Page 102)

102 EXCEL MERIDIAN DATA

Following is an example to explain the Transition function.

In the example above, there is a four-drive RAID 5 disk array and a global spare drive. Physical drives 1, 2, 3,

and 4 belong to the disk array. Physical drive 5 remains unconfigured. Physical drive 6 is a revertible spare drive.

If a physical drive fails in a disk array and there is a spare drive of adequate capacity available, the controller

automatically rebuilds the array using the spare drive. In this example, physical drive 3 failed and the array is

rebuilt using physical drive 6, the revertible spare drive.

When the rebuild is complete, the spare drive has replaced the failed drive. In this example, failed drive 3 was

replaced by spare drive 6. The disk array now consists of physical drives 1, 2, 4, and 6.

There is no spare drive at this moment. Even if physical drive 5 is of adequate capacity, it has not been

designated as a spare, therefore the controller cannot use it as a spare.

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EMD Storage SecurStor 16i Spécifications Page 102