User manual

 High – More system resources to Synchronization, fewer to

data read/write operations.

4. Click the Confirm button.

Logical Drive Problems:

Logical drive Problems typically result from a physical drive failure. The most

common Problem is a critical logical drive. The RAID controller can rebuild a

critical logical drive.

A more serious but far less common Problem is an Incomplete Array. An

incomplete disk array results from a physical drive that fails or becomes

missing during:

 RAID level migration

 Physical drive transport

3.4.4 Spare Drive Management

If you have an unassigned disk drive, you can assign it as a spare drive. A

spare is a disk drive that has been designated to replace a failed disk drive in

a RAID Volume. In the event of the failure of a disk drive within a RAID 1 or

three drive RAID 5 Volume, the spare drive is activated as a member of the

RAID Volume to replace a disk drive that has failed.

A spare drive cannot replace the failed drive in a RAID 0 Volume because of

the way in which data is written to the disk drives under RAID 0. A spare drive

is not available for a RAID 10 Volume because RAID 10 requires all four disk

drives in the ShareCenter

Pro DNS-1550-04 enclosure. However, when you

replace the failed disk drive, the ShareCenter

Pro DNS-1550-04 will

automatically rebuild the RAID Volume using the new disk drive.

To assign a spare drive:

1. Click Storage tab > Spare Drive. The list of spare drives appears.

2. Move your mouse over the spare drive you want to display the options of

the spare drive, including:

 ID