Working with a Corrupted RAID System

If you have a corrupted RAID configuration and one or more drives in the array are damaged, you can combine the healthy drives together with the damaged drives in a virtual disk array. If the damaged drives are inaccessible, you can substitute a "dummy" drive as a replacement. Active@ UNDELETE simulates the RAID assembly and you can scan this virtual array as a logical device.

To Create a Virtual Disk Array:

1. To open the Virtual Disk Array Assembly dialog box, do one of the following:
• From the Tools menu, choose Virtual Disk Array (RAID).
• From the main toolbar, click RAID.

2. Specify the virtual array type.
3. To select disks, do one of the following:
• Double-click a disk in the Available disks list to move it to the Selected disks list.
• Click a disk in the Available disks list to select it. To move it to the Selected disks list, click Add.
4. To change the order of a disk in the Selected disks list, select it and click Move Up or Move Down.
5. To remove a disk from the Selected disks list, do one of the following:
• Double-click a disk in the Selected disks list.
• Click a disk in the Selected disks list. To remove it, click Remove.
6. To remove all disks from the Selected disks list, click Remove All.
7. In Stripe block size, specify the stripe block size in kilobytes (Stripe and RAID-5 arrays only).
8. If RAID5 is recognized, select a parity layout from the Parity layout drop-down list.
9. In some cases, you may be able to specify Disk Area to use in Virtual RAID. To do so, enter the first sector and the area size in sectors.
10. Click Create. The Processing… dialog box appears.
11. To display creation events and progress details, click Details.
12. To terminate the creation process, click Stop at any time. Results may be not accurate or complete.
13. If a virtual disk array is created successfully, a new node appears in Recovery Explorer tree.
14. If a virtual disk array is not created, or if it is created with errors, return to step 1 and try again with different disks, or with a different disk order and RAID options.

Parity Layout Choices for RAID5 Array

Left Synchronous 0 5 6 P 1 4 P 11 2 P 7 10 P 3 8 9

Left Asynchronous 0 3 6 P 1 4 P 9 2 P 7 10 P 5 8 11

Right Synchronous P 5 6 11 0 P 7 10 1 4 P 9 2 3 8 P

Right Asynchronous P 3 6 9 0 P 7 10 1 4 P 11 2 5 8 P

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