Given the following situation, due to user error:

 

* A single data disk of an array has survived. The others have been formated.

* The unRAID USB disk has been formated.

 

I would like to mount the remaining disk and save the data.

 

Here is what I have tried from the Terminal in Linux:

$ sudo mount -t xfs /dev/sdb /mnt/unraid-disk

mount: /mnt/unraid-disk: wrong fs type, bad option, bad superblock on /dev/sdb,
missing codepage or hepler program, or other error.

I am pretty sure I did not format or write to this disk in any way. How can I mont this disk in Linux? Is this even possible? And if not,  is there a procedure to save the data on that disk?

You need to specify the partition /dev/sdb1

 

Do you not intend to have an Unraid system? If you do, then you can work with it in Unraid just as well as you can in another linux.

@trurl Thanks for your quick response. If I specify the partition, I get the following error:

$ sudo mount -t xfs /dev/sdb1 /mnt/unraid-disk
mount: /mnt/unraid-disk: special device /dev/sdb1 does not exist.

`fdisk` returns the following information:

$ sudo fdisk -l

Disk /dev/sdb: 746,5 GiB, 801569726464 bytes, 1565565872 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot Start        End    Sectors Size Id Type
/dev/sdb1           1 4294967295 4294967295   2T ee GPT

Interestingly this is a 3TB disk.

 

So you have a suggestion as to what I could try next?

Edited January 14, 20197 yr by caillou
fixed typo

@trurl I installed unRAID and unraid tells me the disk is 802 GB (instead of 3000 GB), and it says "Unmountable: Unsupported partition layout".

 

Is there any chance I can save this data?

What controller is this disk connected to?   It sounds like you might be using a controller that cannot handle disks greater than 2TB in size?

@itimpi That was exactly it! The data is back!

 

I used an old SATA-to-USB controller. Tried it with another one from the office, and the disk mounted.

 

Can I ask you, what tipped you off?

9 minutes ago, caillou said:

Can I ask you, what tipped you off?

 

3 hours ago, caillou said:

Disk /dev/sdb: 746,5 GiB,