Active
UNDELETE

Virtual RAID

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Active @UNDELETE ver. 14
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Virtual storages

Active@ UNDELETE allows you to create virtual entities - disks and partitions to emulate real once without affecting data on physical devices for better access. Thus, user can emulate actual physical disk by assigning different values of disk geometry properties and read data from device if different sequence and interpretation.

Virtual RAID is software mocking or real physical drives (disks) RAID assembly to access data on these disks. Active@ UNDELETE supports all major RAID types:

  • Stripe RAID-0
  • Mirror RAID-1
  • RAID-5

Application also supports non-RAID arrays, like spanning of drives, when several disks are simple concatenated in a single big one.

Virtual RAID item in Recovery Explorer. Active@ UNDELETE

Figure 34: Virtual RAID item in Recovery Explorer example

Created virtual RAIDS appears in Recovery Explorer view and can be handled as real disks with partitions and volumes for purpose of file recovery. Due to nature of these objects, partition restoration on them is impossible.

 

Virtual RAID Assembly

Active@ UNDELETE is an advanced data recovery toolset allows to reconstruct damaged or broken RAIDS.

Virtual RAID assemblies are used to recover files from damaged physical RAID. To assemble virtual RAID follow the steps:

1. Open the Virtual Disk Array Assembly dialog

  • From the Tools menu, choose Create Virtual RAID (RAID) command.
  • From the Tools tab in Command Bar, choose Create Virtual RAID command.
Virtual RAID item in Recovery Explorer. Active@ UNDELETE

RAID Type

See: Disk arrays (RAID's) for information about how to select proper RAID type.

Block size

Size of stripe block in bytes. Applicable only for stripe or RAID-5 array types.

Sectors per Block

Size of a block in sectors

Offset

Offset of selected disk area from beginning if a disk in sectors.

Size

Size of selected area in sectors.

2. Select and order source disks

To add disks to virtual RAID Assembly:

  • Double-click a disk in the Available disks list to move it to the Selected disks list
  • Use check marks to add disk to the Selected disks list

To remove disks from Selected disks list:

  • Double-click a disk in the Selected disks list
  • Click a disk in the Selected disks list. To remove it, click Remove
  • To remove all disks from the Selected disks list, click Remove All

3. Define disks order (optional)

To change the order of a disk in the Selected disks list, select it and click Move Up or Move Down.

4. Adjust disks boundaries (optional)

For each selected disks offset and size can be defined to specify part of a disk used in RAID assembly. By default entire disk is used in disk array.

Note: For each selected disk, used disk range can be set individually.

Tip: Click on disk partition or unallocated space to select entire partition or unallocated space to disk range for RAID assembly.

5. Specify the virtual array type

Select one of the supported RAID types:

  • Simple volume
  • Spanned array
  • Mirror (RAID-1)
  • Stripe (RAID-0)
  • RAID-5 (left asynchronous) — default value
  • RAID-5 (left synchronous)
  • RAID-5 (right asynchronous)
  • RAID-5 (right synchronous)

6. Set additional options (if required)

  • In stripe block size text box specify the stripe block size in kilobytes (Stripe and RAID-5 arrays only)
  • For RAID5 select a proper parity layout from drop-down list box. See Disk arrays (RAID's) on page 148 for parity layout reference

7. Click Create Virtual RAID button

The Processing… dialog appears.

Note: To display creation events and progress details, click Details.

Note: To terminate the creation process, click Stop at any time. Results may be not accurate or complete.

As a result, assembled virtual RAID must appear in Recovery Explorer view as a device, ready for scan or other actions applicable for virtual devices.

If a virtual disk array is not created, or if it is created with errors, return to 1 and try again with different disks, or with a different disk order and RAID options.

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