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arsufi2002, Computer Enthusiast
Category: Computer Hardware
Satisfied Customers: 1588
Experience:  3 Years of experience in the field of Computer Hardware Troubleshooting
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raid 5 , 2 discs went offline , I forced them online , still

Customer Question

raid 5 , 2 discs went offline , I forced them online , still cannot access data, anything I can do to recover the data ?
Submitted: 4 years ago.
Category: Computer Hardware
Expert:  James replied 4 years ago.

With RAID 5, you get fault tolerance for only one hard drive. If you lose more than one drive, your data can never be recovered, since it is distributed across all the disks in the array (with 1/n of the space on each of the n disks used for parity).

Try to physically remove or disconnect one of the failed drives, and then reboot. If that doesn't work, try the same thing with the other drive disconnected.

Forcing a drive online is futile, it just changes the status - but if the drive is actually bad (head crash, internal board failure, etc) that will not accomplish anything.

If you have any other questions or need more information, please ask me – I’ll be happy to respond!
I'd appreciate it if you can rate my service using the faces below my answer.

Many thanks,

Customer: replied 4 years ago.

This answer is nothing I did not know, I was relying upon an expert to tell me the next step forward. The drives are now online, with no media errors etc, so how will I recover the data ? any recommended software ? IF the two discs out of 3 are broken, not convinced, then how can I get at the data ?


Expert:  James replied 4 years ago.
I'm sorry, I wasn't aware you already knew all that. I'll opt out so that someone else can help you.

Good luck,

Expert:  Carl Day replied 4 years ago.

I cannot help much but for data recovery I use

I find the program excellent for normally recovery jobs never tried it on raid. If you need data recovery in the uk. I have used these companies in the past.

Expert:  arsufi2002 replied 4 years ago.

My name isXXXXX shall assist you with your problem.

From conversation, i have seen you forced disks to online and can see the logical drive.

But could you tell me the status of Raid array(logical drive)?
(Is it on degraded or optimal state)

If logical drive is good to read, you can retrieve data using offline method. Since server has raid controller, normal softwares doesn't work.

What we can do is you may use any Linux Live disk which loads from CD/DVD drive. Most Linux versions has inbuilt raid controller driver on it. So it would detect your controller and thus logical drive.

I recommend Ubuntu. If you may have other of-course you can use yours.

1: Load linux from disk
2: On linux simply use file explorer, it would show our logical drive and hence data on it

3: Connect external storage device and move data to safe place

Let me know the status


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