Comments on: Replacing failed Raid Drive

By: Ben F

Ben F — Sat, 28 Jan 2012 18:35:09 +0000

Thanks for the great write up – I’ve got a failed RAID 1 array on a Centos5 box and this is the clearest practical write up I’ve found.

By: Replacing failed software raided drive « www.LinuxGeek.net

Replacing failed software raided drive « www.LinuxGeek.net — Sat, 21 Jan 2012 08:59:21 +0000

[...] failed software raided drive I referenced these instructions to remind me how to replace a [...]

By: Bhaskar Chowdhury

Bhaskar Chowdhury — Wed, 21 Dec 2011 06:39:46 +0000

Magnificent…clean and clear way of describing complex thing..kudo to you..

By: sennai

sennai — Wed, 02 Nov 2011 17:48:39 +0000

Awesome.
Thank you verymuch for this great post. I really helped me today.

By: Linux NAS / Media Server « Petteway's Blog

Linux NAS / Media Server « Petteway's Blog — Fri, 21 Oct 2011 04:46:26 +0000

[...] a raid 5 array http://scotgate.org/2006/07/03/growing-a-raid5-array-mdadm/ Replace Failed drive http://www.kernelhardware.org/replacing-failed-raid-drive/ sources http://bfish.xaedalus.net/2006/11/software-raid-5-in-ubuntu-with-mdadm/ [...]

By: John

John — Thu, 20 Oct 2011 16:40:50 +0000

Hi,

I actuially found this post while searching for fixes for my “missing” drive problem on my QNAP Ts809u-RP NAS device. The device is an 8 bay NAS that runs a modified linux kernel installed on a Disk on module (DOM), and software raid using mdadm. I have 8 1Tb seagate’s on it in softawre raid 5 and after a recent firmware update to the DOM the drive in bay 6 of my NAS went missing. The drive is healthy as reported by SMART.
I have tried the follwoing to resolve the issue:
1: removed and reinstered dirve- the drive showed up and RAID started rebuilding then the drive dissapeared.
2. Delete the array and reset the device with all drives removed. After this the drive showed up again but was marked as “BAD” just before going missing again.
3.) placing another drive in the bay and it does not show up.

Cold boots resets, staritnght edevice with no drives present all fail as well. I can not revert to previous firmware, although that shouldn’t work either as I’ve heard this has happened in all HW versions of the NAS. From what I’ve encvountered in my googling of the topic is that this problem is not limited to the QNAP NAS, the controller or even the managing OS but to software RAID as a whole. I’ve read this missing drive issue on intel controllers in windows as well. Any ideas would be greatly appreciated.

By: Linux RAID need help.

Linux RAID need help. — Tue, 27 Sep 2011 06:19:05 +0000

[...] RAID array. It also explains how you can rebuild the RAID array once you get the replacement hdd: http://www.kernelhardware.org/replac…ed-raid-drive/ [...]

By: Benny

Benny — Sat, 16 Jul 2011 22:36:16 +0000

Hi, thanks for the hints.

Did it in another order, first added the new drive as spare, then set the bad drive faulty

also if you have hotswap drives you don’t need to reboot the machine

By: Gabriel Ramuglia

Gabriel Ramuglia — Wed, 04 May 2011 19:35:41 +0000

Brilliant instructions. I’ve rebuilt a couple of arrays before, but this was by far the easiest and least painful instructions for it. The sfdisk command saved me a lot of time.

By: till

till — Tue, 04 Jan 2011 15:22:38 +0000

thanks so much, exactly what I needed today!