Raid 5 data recovery
R-Studio detects and handles the hardware or software RAID as a regular drives / volumes But what to do if he is corrupt RAID, but there are only disks (disk images), from which it was composed? In this situation, to restore data, you can use R-Studio. The number needed to restore the healthy disks depends on the structure of the array RAID. For example, a mirrored volume (RAID 1) requires only one disk, while in case of damage volume, RAID5 data recovery will take at least two serviceable disk.
Working with RAID arrays in R-Studio is based on the concept of virtual volume sets and RAID. Using R-Studio, you can recreate the original RAID from existing disk (disk images) and handle it like any other object. RAID can be recreated to scan, search for lost files on it and restore it as a normal disk / volume.
Virtual RAID can be composed of any object R-Studio - from the physical, logical drives or images.
Virtual volumes and RAID are purely essential objects, and R-Studio does not have any effect on the actual data disks, of which they consist.
You can read more about working with arrays in aid for R-Studio: Volume Sets and RAID.
Consider how to work with RAID arrays in R-Studio, for example, a simple volume RAID5:
Simple RAID 5
Options:
A. Number of discs: 3
Two. Objects R-Studio: SCSI (3:0), SCSI (3:1), SCSI (3:2)
Three. Block Size (Block Size): 64 KB
4. Offset (Offset): 0
Five. The order of blocks (Blocks order): Left Asynchronous (Continuous) (Left Asynchronous (Continuous))
A 2 PD
3 PD 4
PD 5 6
Where PD means the parity of data
To create a virtual RAID:
A. Click created virtual volumes, or RAID (Create virtual volume sets or Raids) and select Create Virtual is RAID5 (Create Virtual RAID5). Virtual RAID5 volume will appear in the left pane Drives (Drives), and the right pane of the main window R-Studio for the newly created RAID5 will have an additional tab Parent object (Parents).
Make sure that the box was checked to immediately apply changes (Apply changes immediately).
2. Drag with the mouse on the tab parent objects (Parents) on the left panel of relevant objects that will make up that RAID5. Then place the objects in the correct order, for example, SCSI (3:0), SCSI (3:1), SCSI (3:2).
3. Then set the desired order of blocks (blocks order) and the shift (offset, in sectors). As soon as R-Studio identifies serviceable file system, drives on the left side (Drives) will be a new object of Partition 1. In this section, you can work as a real object.
In this section, you can work as a real object.
For example, to view the structure of folders / files created virtual RAID5, double-click on the object Partition 1.
To verify that the RAID5 set up correctly, you can see in R-Studio graphical file by double clicking on it with the mouse.
Note that for the successful recovery of data should be properly set all the parameters of the array RAID - the order of the objects, offset, size and order of the blocks. In some cases, R-Studio can correctly identify the object and its file system, and any of its parameters is incorrect. Therefore, to verify the correctness of a RAID array is always recommended to view the image file as large as possible. You can use the following formula to determine the minimum size of the file:
The block size * (number of drives -1)
In our case, the minimum file size is 64KB (block size) * (three disks - one disk (2)), which gives 128 KB.
You can read about how to find the parameters of RAID in this article: Definition of RAID options.
Users can also create, save, edit and upload your own RAID configuration. Missing items can be replaced by objects or Missing Disk Free Space (Missing Disk or Empty Space). For more information, check out, the User Manual R-Studio.
Ability to enable / disable objects.
To activate / deactivate objects to / from the virtual RAID or volume set is enough to install / remove the check box Enable (On) tab parent objects (Parents). This capability allows, for example, to check which disk is actually not part of the RAID5.
R-Studio replaces the disabled object Missed CD (empty space) of identical size.
Let us consider a more complicated that RAID5.
Sophisticated RAID-5
Now, as the virtual objects will use RAID5 disk images .
Options:
A. Number of discs: 3
Two. Objects R-Studio: files, disk images : Y: \ Disk1.dsk, Y: \ Disk2.dsk, Y: \ Disk3.dsk
Three. Block Size (Block Size): 4 KB
4. Offset (Offset): 64 KB
Five. The order of blocks (Blocks order): Custom (Custom)
PD A 2
PD 3 4
PD 5 6
7 PD 8
9 PD 10
11 PD 12
13 14 PD
15 16 PD
17 18 PD
To create this virtual RAID:
A. Click created virtual volumes, or RAID (Create virtual volume sets or RAIDs) and select Create Virtual is RAID5 (Create Virtual RAID5). Virtual RAID5 volume will appear in the left pane Drives (Drives), and the right pane of the main window R-Studio for the newly created RAID5 will have an additional tab Parent object (Parents).
Check the box to immediately apply the changes (Apply changes immediately) was withdrawn, as RAID set up to be edited.
2. Drag with the mouse on the tab parent objects (Parents) on the left panel of relevant objects that will make up that RAID5.
Then place the objects in the correct order, for example, I: \ Disk1.desk, I: \ Disk2.desk, I: \ Disk3.desk.
Set the block size (Block size) and offset (Offset). Do not change the order parameter blocks (Blocks order).
3. In the Number of rows: (Rows count :) Parent object's tab (Parents), type 9. The value of order of blocks (Blocks order) will change to Custom (Custom).
Set the order of blocks with the corresponding table Tab Parent objects (Parents).
Using the keyboard: Use the cursor keys for navigation keys and the key "p" to enter the appropriate values.
Using the mouse: right-click on the appropriate cell and select from context menu or the corresponding value of the parity (parity). If the table is large enough, it is better to enter numeric values with the keyboard.
Corrections: If you enter some values incorrectly, R-Studio will show you this. Navigate to the appropriate cell and enter the correct value. To delete the contents of a cell, use the key Del.
Delete the entire contents of the table: right click on the table and select context menu item Clear All (Clears all).
4. After filling in the table, click applies (Apply) to the objects' tab, Parent (Parents).
As soon as R-Studio determines the file system on the left-side drives (Drives) will be a new object of Partition 1. In this section, you can work as a real object.
For example, to view the structure of folders / files created virtual RAID5, double-click on the object Partition 1.
To verify that the RAID5 set up correctly, you can see in R-Studio graphical file by double clicking on it with the mouse.
