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arcea 1120 raid stopt working

Posted on 2011-03-02
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Last Modified: 2013-11-22
Hi all,

We have/had an Areca 1120 S-ata II x8 channel raid controller.
Which works great and always had.

Since today the server isn't starting any more.
On boot the raid controller becomes active and shows in the menu that there is no raid set defined.

Don't know what went wrong.
The log shows that there was a read error on channel 6. So I disconnected the disk6 and rebooted the system.
Then it showed me that the channel 1 and channel 2 were disconnected as well.
Probably bad connection.
Rechecked the S-ata cables and power cables.
Now all 7 disks are detectable. But no raid set is defined.

So I cannot boot.
I could create a new raid set but I think that will destroy all of our data.

The bad news is I don't have a good backup set from this raid disk set.
So I would really like to recover the data first before reinstalling.

The other bad news for me is that the OS is FreeBSD. And I don't have much knowledge about this OS. Its rock solid and setting up is easy also samba file sharing.
That is the only server role done. now, what can I do?

Please advise
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Question by:osa2
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dlethe earned 500 total points
ID: 35024138
Looks like the controller lost the metadata.  First, your data is safe.   However the best thing to do is contact Areca support for proper recovery procedures.   In most cases you would replace the controller with same make/model and it would "learn" the config from the existing RAID set.

The conservative thing to do is get some scratch disks (sufficient space), and use something like dd to make a bit-level copy of all contents of each HDD.   Then you have a copy.   Since you are using FreeBSD, then you're a unix guy.   Just attach the disk(s) to a NON-RAID controller,  dd if=/dev/xxxx of=/targetdisk/disk0.bin bs=64k    then repeat.

So while you wait to log a call source a replacement controller.  Ask Areca support if you have to worry about trying to match firmware revisions between the presumably bad card and the new one.  Areca will have a way with LEDs or something to confirm that it is the controller .. but extremely likely it is.
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by:osa2
ID: 35025523
Thanks for the advice.
Do I need to buy new harddisk for every harddisk in the server?
Or just 1 big hdd wich exceeds the total of all the drives together?

I really hope the data is safe. As in the future if I can recreate all the data. I will use 2 backups 1 on tape and 1 cloud storage just to be shure.
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by:dlethe
ID: 35026643
one big HDD is fine.   also, you can gzip all the individual "files" that each represent a full disk drive.  Of course, you never want just one copy of anything, so the right thing to do is get 2 large HDDs and copy everything twice.
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