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#1 2011-01-11 19:30:09
- Darkside
- New member
- Registered: 2011-01-11
- Posts: 3
Lost one 1.5TB Drive - what to do
Hi,
I just lost one of my 1.5TB drives, which was in the left bay - if that matters.
I had a 750Gb Mirror on them and the rest of each disks went together as 1.5TB jbod.
I can still access the drive on the right bay, showing a degraded RAID1 of 750GB. Is there any chance, to still access the data on the jbod? I fear not, right? Which means, I just loss all my videos 
So, if I put in another 1.5TB, can I put it in the left and rebuild the raid? or do I have to switch the still working drive to the left bay and put the new one into the right, before starting the rebuild?
What should I do with the remaining 750GB on each drive? Better build another raid1 or any better suggestions?
Tnx for any help
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#2 2011-01-12 13:24:55
- fordem
- Member
- Registered: 2007-01-26
- Posts: 1938
Re: Lost one 1.5TB Drive - what to do
If you insert another 1.5 TB drive the system should format it and resync the RAID volume, doesn't matter which bay - however - they are reports of the wrong drive being formatted and the data lost, so backup first. As far as I know, the data in the JBOD is unrecoverable.
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#3 2011-01-12 22:10:33
- Darkside
- New member
- Registered: 2011-01-11
- Posts: 3
Re: Lost one 1.5TB Drive - what to do
I already read that in the wiki, so I thought it might be a good idea to ask, what the proper procedure would be.
I thougth about just put in the replacement disk, let the system format it, add the degraded raid1 disk into the original, right bay and then just going to the raid section and try to rebuld the raid from there.
Any comments on that? No one already did that?
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#4 2011-01-13 01:57:33
- fordem
- Member
- Registered: 2007-01-26
- Posts: 1938
Re: Lost one 1.5TB Drive - what to do
First let me say this - there is a step by step procedure in D-Links FAQ for the replacement of a failed drive in a RAID1 array.
Essentially what you do is identify which drive has failed, power the unit off, replace the failed disk, power the unit up, log into the admin webpage and the unit will prompt you to format the new drive - when the format completes it prompts for a restart after which it resyncs the data.
And yes - I have done it - both in disk failure simulations, and on the single occasion on which I had a disk fail - it worked, every time.
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#5 2011-01-13 19:39:06
- Darkside
- New member
- Registered: 2011-01-11
- Posts: 3
Re: Lost one 1.5TB Drive - what to do
Well, what you just decribed seems to be the procedure which might get your remaining, partly healthy (JBOD is dead anyway) RAID1 part accidentally formatted - thats what I feared.
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#6 2011-01-14 04:14:54
- fordem
- Member
- Registered: 2007-01-26
- Posts: 1938
Re: Lost one 1.5TB Drive - what to do
Sounds like your plan is to remove the good disk, format the replacement, reinstall the good disk and resync - is that it?
Assuming you have shell access and the skill to do it manually - I guess you're good to go.
On the other hand - if you don't, then it's not going to happen the way you plan - D-Link's firmware requires both disks to be present during formatting when creating a RAID array, and does not allow you to create an array without formatting.
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