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ARECA RAID Rescue

Dec 13

Written by:
12/13/2012 7:20 PM  RssIcon

ARECA RAID Rescue

 

Symptom: Lose 1 drive, drive returns but array doesn't auto rebuild (it usually does)

Go to "rescue RAID set" in the Web GUI for the Controller (case is important)

Type: RESCUE

reboot

 

 This will start the rebuild process.

 

Symptom:  Lose 1 drive, drive returns, see 2 raid partial raid sets (I hoping I'm transcribing my notes correctly, but this is sequence, some details may vary slightly, the words to type are exact)

 

Go to "rescue RAID set" in the Web GUI for the Controller (case is important)

Type: RESCUE

reboot

Go to "rescue RAID set" in the Web GUI for the Controller (case is important)

Type: SIGNAT

Type: LeVeL2ReScUe

reboot

Go to "rescue RAID set" in the Web GUI for the Controller (case is important)

Type: SIGNAT

 

 

This has saved my arrays a couple times. 

 

16 comment(s) so far...


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Re: ARECA RAID Rescue

Hi!
Just wanted to say that this manual helped me after I accidently disconnected one of the drives from the controller. Which made it ending up with two partial RAID sets.
Thanks!

By Robin on   7/28/2013 2:53 PM
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Re: ARECA RAID Rescue

Dear sir,
I was in your second case. As I had two raidset-001 instead of one, I've tried deleting one. One was saying "degraded mode" and the other "failed ..." (don't remember exactly.

Even if it deletes the two raidset-001 instead of one, I'm able to rebuild one with your help (RESCUE reboot SIGNAT LeVeL2ReScUe reboot SIGNAT. But at least these last SIGNAT command doesn't work. I have to reboot, and raidset-001 disappear anytime. That's two 2To disk in RAID 1.

Putt offline raidset in order to put in online after doesn't work.

Have you a better idea that deleted My raidset-001 when it is recovered in RAM and create it again. Will areca controller ask me immediately after if i want to re-init or not this raidset ?
or have we saying to areca controller elsewhere "that we don't want to re-init this raidset" ?

Thank you very much for this share of experience

By Jean-Claude FAUCON on   2/13/2017 12:17 PM
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Re: ARECA RAID Rescue

Hi,

Just to make sure I understand your situation, let me repeat it so I am clear.

You have a RAID 10 (5???) lost a drive at least temporarily and ended up with 2 RAID 01 drives, one of which was degraded, the other was failed. Correct?

You follow method 2 above, and it appears to work, however, if you reboot, the changes are lost? Is this what is happening?

Also, have you checked all the connections to the drives? Specifically the drives in the "failed" array. Does the view of the physical drives show that all drives are online/active?

Jerry

By Jerry Langland on   2/13/2017 5:20 PM
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Re: ARECA RAID Rescue

Dear Jerry,
I was full of hope (and I was right) when sawing you answered me immediately. But I worked on this problem until 5 PM o'clock. I thought I could exactly remember later what I do, after a couple of full nights, but remembering all thing exactly isn't as easy.

First thing : what was exactly my config.
As I haven't enough hard disk of the same size, I had tree 3TB disks in RAID 5 on a hand, (good or bad english ?) and two 2TB in RAID 1 (mirror) on the other. These appear as two part of a unique dynamic disk of 6+2=8TB in windows. But at the slightest problem I was loosing all this dynamic windows disc with all my bouht programms, backup.data ....

Thank to you I saw my that I was mix up two different things : when the areca RAID card was starting, it wasn't talking about two raidset but about volume !!!

I bought chenbro rack as a used rack. One of the two disk of the mirror was alone. The four other were one of the two 4 drives chenbro's backbplanes. The second backsplane had my all new 3x4TB drives in RAID 5 using a also bought used LSI92804i4e.

The RAID5 was using one RAIDset , the RAID1 was using the other, but I had two RAIDset for the the same RAID1 instead of one.

I didn't understand if all was good with these backplanes as the the light up and colors of the HHD's LED during POST and even after of the two different backplanes where very different.

As you suggested a hardware problem, I changed one of the two mirrored 2TB drive. I put a 3TB one instead. The auto-rebuild hasn't worked, maybe it wasn't enough cleared for this. For telling futur readers exactly how I recovered my datas, today I put offline the RAIDset of the mirrored drives . But I didn't find again what I used the first time ; something like "force incomplet raidset" to recover my datas. For the future readers, can you tell me if it is in a menu, what menu or Areca cli command ?

After, even without auto-rebuild working, I could copy all my datas from Areca heterogeneous array to a beautiful whole RAID 5 Array, on the LSI RAID Card.

Your are a gentleman.

By Jean-claude FAUCON on   3/13/2017 12:59 PM
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Re: ARECA RAID Rescue

"...were ON one of the two 4 drives..."

By Jean-claude FAUCON on   3/13/2017 1:02 PM
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Re: ARECA RAID Rescue

So, you at least got your data back? Just to confirm? I think the problem was the hetrogenous drive sizes. The only cards that I have found that are "easy" to do this with are the LSI and Dell branded LSI higher end cards. All of which have a much better management interface.

The ARECA is very powerful for the price, but the management interface is very confusing and documentation is horrible. So while, I am sure it can do multiple drive sizes etc, the correct steps are not at all obvious.

By Jerry Langland on   3/13/2017 1:13 PM
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Re: ARECA RAID Rescue

PS :

I think I had to delete one of the two RAIDset with the same name for the two mirrored disks.

I recovered all my "datas".

Jean-claude

By Jean-claude FAUCON on   3/14/2017 4:10 AM
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Re: ARECA RAID Rescue

Dear sirs,

I've got a little question and I hope you can help me. I wonder if there is a possibility to get information from RAID without using HW RAID controller. In my case I've got disks with data which were written via ARC-1882. This controller is very far from me now and I would like to know if there are any ways to get information. Can I perform it using some kind of software controller, for example?

Thanks.

By Andy on   2/8/2018 8:00 AM
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Re: ARECA RAID Rescue

Hi,

Based solely on my experience, I would say that the chances are very slim.

It can be tricky enough just moving a raid set to a new controller of the same brand/chipset, let alone to something completely different.

There are, I am sure, some forensic tools one could get to do this sort of thing, but they would be so slow/painful/expensive (and this is recovery of data not use of the array) that you'd be better off buying another 1882 controller, say from e-bay. \

Even then, there are no guarantees that importing the foreign configuration will be successful. All the disks have to be in good condition etc.

The big thing to do if you attach it to any other raid controller is DO NOT INITIALIZE the array, as that will wipe out any old information. If you attach it to any other controller of any sort, do not initialize it. Just look to see if it recognizes a foreign configuration and will let you import it.

Jerry

By Jerry on   2/8/2018 4:28 PM
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Re: ARECA RAID Rescue

Thank you so much for your reply Jerry.

I had a hunch a new controller is the easiest way and I was just hoping that there is some kind of software emulator that I don't know about.

Nevertheless, I really appreciate your help.

By Andy on   2/9/2018 12:12 AM
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Re: ARECA RAID Rescue

No problem. Been in your situation too many times. Generally no good answers.

Good luck!

By Jerry on   2/9/2018 9:02 AM
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Re: ARECA RAID Rescue

Hello,

I have ARECA 1883i RAID stripped RAID 5 (One Volume with 6 x 4tb drives). I have had two drive (#3 and #6) fail at the same time. How can I resurrect the Volume? Many thanks.

By james baillies on   3/20/2018 1:45 PM
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Re: ARECA RAID Rescue

If there are 2 totally dead drives with RAID 5, there is not much you can do. RAID 5 (independent of whatever controller you use) can only recover from the loss of 1 drive.

Now, if the failures were not complete, you could possibly recover. For example: If both drives did not actually die, but only became disconnected (or 1 became disconnected and 1 died)--or if the drives just have errors on them that cause them to drop, causing the raid volume to go offline, then you should be able to restore at least temporarily.

So if the either (or both) of the drives is not completely dead/gone (and you have not formatted it or anything) then you can put it in and try the above method.

You will want to have 6 drives in place, at least 5 of which need to be from the original array to have a chance.

By Jerry on   3/20/2018 2:04 PM
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Re: ARECA RAID Rescue

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