Clone a crashed internal WD HDD from NAS

Killer Nads

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Apr 30, 2013
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Hi guys,

So one of my HDD's crashed in my synology NAS yesterday, putting the whole volume in danger. I can still access data on my NAS but cant make any modifications.

Anyway, i have no option but to remove the hard drive and replace it, the hdd was only 3 years old so i filed a RMA with WD who are sending me a replacment.

Once i recieve the replacment i want to put both hdds in my pc and clone the failed one to new one. How can i achieve this? Which free windows software can i use?

I also tried running a S.M.A.R.T status scan on the failed hdd in the NAS and it only reaches 90% before stalling out.

Please help me get my NAS volume back up running again.

Thank you
 
Solution
If it's a board failure, then the following PCB suppliers will transfer the board's "adaptive" information for free:

http://www.onepcbsolution.com/
http://www.hdd-parts.com/

TyrOd

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Aug 16, 2013
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You can't clone a physically failing drive. You need a professional data recovery lab to do that.
However, if you were running a RAID with some redundancy you should be able to rebuild the volume when you replace the drive. You shouldn't be using the NAS with the until you get the replacement since it's running in a degraded state and any modifications to the remaining drives will create inconsistent parity data complicating any data recovery attempts in case you do need them.

You could of course clone the remaining drives in the NAS that haven't failed in the mean time to prevent any issues that can occur from the rebuild. In fact I would strongly recommend you do this since it's not unusual for a rebuild to fail.
 

Killer Nads

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ok thanks guys, no my NAS doesn't have any RAID option. It is running using JBOD (without data protection), hence replacing the failed drive won't work.

Im going to try to clone the failed drive, or perhaps i should try repair it first then clone? Then place the clone back into the NAS and see what happens?! Hoping that it may just continue on as it was.

if it doesn't, then my only other option will be to delete the whole volume and then start creating everything step by step again as to how it was through backups which will take hours and hours. But the good thing about this is that i can this time choose the Synology Smart RAID option which will help in the future?!

thanks
 

TyrOd

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Aug 16, 2013
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You can't repair a drive that's physically failed either. The best you'd be able to do is buy a replacement logic board from a company that will swap the adaptives for you for a couple hundred dollars.
If it's mechanically unstable or failed, then you need professional hardware to recover and anything you try on your own will only make it worse.

If you have backups, then use them. Hard drive failure is inevitable and if downtime is painful for you then you need at least a RAID5 for single drive redundancy.
However, rebuilding a RAID obviously takes some time as well, so the system will be running in a degraded state until you rebuild. That will effect performance but minimize downtime.
 

S Haran

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Jul 12, 2013
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The Linux ddrescue command is designed to image/clone failing drives. You might give that a try.

Ofcourse if the drive has a physical failure then no software based cloning tool will work and you would need pro help.