RAID 1 data recovery on External HD

Wd Western digital my book mirror editio...
March 8, 2010 at 12:27:21
Specs: Windows XP
I am about to get an external hard-drive (Western Digital 2TB MyBook Studio Edition II) and put the twin 1TB drives in RAID 1 config.

I just read this comment in regard to accessing the 2nd, mirrored drive after one failed

"Essentially, although the data was recovered (at many times the cost of the unit!) it took about 3 weeks to get our data back ... If something goes wrong, the problem lies that you have to find an identical controller to 're-setup' the same operating environment. Then use high-end data recovery software to recover the data. None of the consumer data recover worked"

In my ignorance, I assumed it would be a pretty easy feat to get at the data on the mirrored drive in the event of one drive failing, as would it be to swap out the failed one and re-mirror it.
Looking into it, the only mention of data recovery on WD support pages talks about "recommended data recovery experts" to consult in the event of a drive failure, =\

Can anyone confirm how easy it would be to access the mirrored data in the event of one drive failing? And how reliable it actually is that your mirror is safe?

(Additionally I read that a power failure, rather than a disk failure, can do both of them in at the same time! RAID 1 is suddenly seeming a whole lot less reliable...)

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March 8, 2010 at 13:45:05
Your RAID 1 recovery depends on where the failure was. If it's a disk that failed, then you should be able to rebuild the array with a new drive and the working copy. If the RAID controller failes, you run into these issues.

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March 8, 2010 at 14:25:45
It also might depend how the array was made. Some hardware raid controllers are quite easy to reconfig. They have a build in bios and small os that can be used at boot and sometimes through software. Might be able to use a barts or linux live cd to acces. Same might be partially true for faux raid controllers. If you have a software based raid you will have to have a barts cd with the software and all drivers too for any array.

Playing to the angels
Les Paul (1915-2009)

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March 11, 2010 at 12:33:44
Thanks for the reply.

Hmmm well hopefully the RAID CONTROLLER failing is far less likely that even a DRIVE failing!

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