Data Recovery from RAID volume

[navneet@laurent]

HARDWARE PROFILE

Motherboard: Intel Desktop DG960T
HDD: Seagate 250 x5 barracuda HDD
Raid Controller: 4 port Silicon Image chipset SIL3114CT176
RAID : 1+0 first 4 HDD
Logical Vol: 465 GB

OS : 1 copy of Windows 2003 r2 on Raid logical volume
1 copy of windows 2003 r2 on the SATA disk attached to the motherboard directly
Boot : Boot from raid volume
Boot from local HDD

Problem:
• After a hard power reset, raid volume is not booting. The system can boot from the os on the local HDD attached to the mother board directly. Silicon 4 drives in RAID 10. Fifth drive sits separately as an IDE drive. I want to get the data from RAID Volume.
• When I boot from fifth HDD, OS can see silicon image controller. Silicon image manager utility shows RAID 10 online and in good condition. I clone the volume data through a cloning utility to another disk and try to recover the file. The folder and file structure looks fine; but I can't open any files. Files are corrupt.
• When I read from a HDD through Hexadecimal utility ,I can see the following in the last sector of each physical disk
Sil Raidset 10 .1
Sil Raidset 10 .2
Sil Raidset 10 /3
Sil Raidset 10 [e

• How to verify the correct HDD on the right port of RAID controller?
• How can I create raid 0 with two disks and save the other two disks to preserve the data.

[lcoughey]

Step 1 - safely diagnose the condition of each drive from the RAID array individually (PCB, heads, surface, firmware, etc)
Step 2 - stabilize each drive from the RAID 10 array, so that it can be mirrored
Step 3 - get a full sector-by-sector clone of each drive from the RAID array
Step 4 - using only the clones, figure out which drive is which
Step 5 - using only the clones, figure out which drive(s) went off line and in which order they failed
Step 6 - virtually rebuild a RAID 0 stripe with the best combination of the four clones
Step 7 - recover the data to a new hard drive
Step 8 - verify that the recovered data is up to date and healthy

If you are unsure of what you are doing and the data is important to you, it is best to seek the assistance of a pro before you try anything.

[dobrevjetser]

+1 Agree

[hhddrec]

Step 1 - safely diagnose the condition of each drive from the RAID array individually (PCB, heads, surface, firmware, etc)
Step 2 - stabilize each drive from the RAID 10 array, so that it can be mirrored
Step 3 - get a full sector-by-sector clone of each drive from the RAID array
Step 4 - using only the clones, figure out which drive is which
Step 5 - using only the clones, figure out which drive(s) went off line and in which order they failed
Step 6 - virtually rebuild a RAID 0 stripe with the best combination of the four clones
Step 7 - recover the data to a new hard drive
Step 8 - verify that the recovered data is up to date and healthy

If you are unsure of what you are doing and the data is important to you, it is best to seek the assistance of a pro before you try anything.

very good step by step for RAID recovery.

[BlackST]

I have a bad feeling something else happened after the failure hope not one or more of the following :

- Attempt to rebuild the array
- Change striping size / options
- Changing or destroying the order of the disks in the array
- Trying to move one or more of the disks to another machine

I don't get if the system partially boots, boots but there are files that are corrupted (on the RAID) or what else.