Recover data with lost RAID configuration?

[mofomofo5]

I had issues with a dead DOM, which went through an RMA. There were issues with a firmware upgrade. But now I am finally able to boot back up. The problem is that my configuration file is gone and I don't have that backed up.

How can I get back to my data? The Thecus sees the drives but it doesn't have any RAID settings. I *do not* want to create a new RAID and overwrite the disks. Can I have it assemble existing info? I have 5 500GB drives hooked up and it was in a RAID5 setup. I don't know what the block size was and I think 100% of the space was allocated but I might have used the 95% default.

Any suggestions? I have a linux (Ubuntu) box and I am thinking of connecting the drives to it and trying to assemble an existing array. I know which disks are which. Googling suggests that 'mdadm --assemble --scan' has some potential.

Any help?

Huge lesson learned on saving configuration files.

[peterfu]

The N5200 detects automatically the arid and does not need the configuration file - so the usual way is to put in the discs in the place they have been before and fire up the N5200.
The the raid and the folder structure is detected automatic - all other settings have to be done manually then (if You have no backup of the config.bin with the correct FW version).
If Your raid was damaged before then its damaged also in the new 5200.
Of course You can try to recover it in Your linux box with the mdadm command.
br
Peter

[mofomofo5]

I could not get the Thecus to detect the raid. I was able to with my linux box though. I assembled it using mdadm and then was able to mount it after fooling around with lvm2. So I was able to get all of the data I needed.

[inerlogic]

the raid info isn't stored on the DOM, it is stored on the drives....

[Arctra]

Jan 21, 2009 0:13:04 GMT 7 mofomofo5 said:

I could not get the Thecus to detect the raid. I was able to with my linux box though. I assembled it using mdadm and then was able to mount it after fooling around with lvm2. So I was able to get all of the data I needed.

Hey mate. Glad you managed to recover your data. Is there any chance you could give more details on what "fooling around" you did with lvm2? My NAS died last night and I am in a similar position to you in that I did not back up my config, and more importantly, I do not seem to be able to find a replacement N5200 to put my disks into in order to try and recover the data.

If I can indeed recover the data using a linux box that will be awesome. I may just take this as an opportunity to get myself an Adaptec RAID card for full hardware raid based NAS.

[nlrela]

No joke, but contact Thecus support !

I had a similar issue and they fixed it remotely ....