Solved

RAID

Posted on 2009-04-06
4
308 Views
Last Modified: 2012-05-06
can you recover data from a 4 drive raid 5 if two drives fail, server2003
0
Comment
Question by:DJnot
4 Comments
 
LVL 32

Accepted Solution

by:
Rodney Barnhardt earned 250 total points
ID: 24076557
Not likely. You may be able to recover some files using a program like File Scavenger. The problem is that data is written in stipes across each drive, and the parity bit is used to recalculate the data in the event of a single drive failure. With two drive gone, the data can not be recalculated. I did have success once with reseating both drives. They came back online and I was able to get a good backup before replacing.
0
 
LVL 7

Expert Comment

by:vikasjus
ID: 24076565
Hi, RAID 5 minimum drive requirement is 3 that two usable disk and one parity. out of two usable one fails you can recover data from parity or spare disk, but if both fails then you will have data loss.
other e.g. if you have four drives then usable disks are three and one parity. if one disk fails you can recover data but if two fails you will have data loss.
In simple words you can recover data only of one disk capacity and not more than that. To have one or more disk failuer allowed in your system you need to configure hotspare or standby disk along with parity disk.
0
 
LVL 12

Assisted Solution

by:coredatarecovery
coredatarecovery earned 250 total points
ID: 24127720
Yes, you can.

You must repair one of the two failing drives to get your data back.

I have done raid 5 recovery of this nature.

It is not something I recommend you attempt on your own.


So, If you need help, give a shout.


0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article we have discussed the manual scenarios to recover data from Windows 10 through some backup and recovery tools which are offered by it.
Stuck in voice control mode on your Amazon Firestick?  Here is how to turn it off!!!
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
Migrating to Microsoft Office 365 is becoming increasingly popular for organizations both large and small. If you have made the leap to Microsoft’s cloud platform, you know that you will need to create a corporate email signature for your Office 365…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now