Disk volume no longer active - XRAID2

[Breizhman]

Hello,

After probably a mistake I have done while wanting to replace a disk on my Nas, the volumes are unmount.

It tells me "The paths for the shares listed below could not be found. Typically, this occurs when the ReadyNas is unable to access the data volume"


I have tried to mount using this method :

1- Enabled Root SSH Access by installing the plugin Enable Root SSH Access 

2- Installed Putty and configure according to this page Accès_SSH_au_ReadyNAS_Duo 
3- Used the method below seen on this post : Disk-volume-no-longer-active-force-activation/td-p/1551794 

# apt-get install mdadm btrfs-progs
# mdadm --assemble --scan
# btrfs device scan
# btrfs fi show
# mount -o ro -t btrfs /dev/md127 /mnt 

But on majority of steps, I have error.

# apt-get install mdadm btrfs-progs

->

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package btrfs-progs

# mdadm --assemble --scan

->

mdadm: No arrays found in config file or automatically

# btrfs devices scan

->

-bash: btrfs: command not found

# btrfs fi show

->

-bash: btrfs: command not found

# mount -t btrfs -o ro /dev/md127 mnt

->

mount: unknown filesystem type 'btrfs'

So I have tried

root@ZIK-BE-7E-56:~# dmesg | tail

And here is the result

md: md127 stopped.
md: bind<sdb2>
raid1: raid set md127 active with 1 out of 2 mirrors
md127: detected capacity change from 0 to 536858624
md: md126 stopped.
md: bind<sdb1>
raid1: raid set md126 active with 1 out of 2 mirrors
md126: detected capacity change from 0 to 4293906432
md126: unknown partition table
md127: unknown partition table

I'm clearly not good on this type of IT and not understand how to resolve.

If I understand, th problem is to be able to install btrfs ?

And my RedayNas is from 2012, so not sure the filesystem used for XRAID2 is btrfs.

Can someone help me on this ?

[StephenB]

---

@Breizhman wrote:

And my ReadyNas is from 2012, so not sure the filesystem used for XRAID2 is btrfs.

---

It's not, so the commands you tried won't work.

If you can connect one of the original disks to a Windows PC (either with a USB adapter or dock, or with SATA), you can try installing r-linux for windows.  https://www.r-studio.com/free-linux-recovery/

That should let you see the data files, and offload them to other storage.

[Breizhman]

Hello,

Thanks for your answer.

It's exactly what I tried today, seems it will works effectively, but i has crashed during the scan. I think because I was doing it from an Ubuntu on a usb key.

I will retry with a real install of Ubuntu on a hard drive

[aks-2]

Since it's a Duo v2, so max config is RAID1 mirror, depending on your config either disk has a copy of the filesystem.

I seem to recall the Duo v2 filesystem is ext4, then the you should be able to read it directly in Linux? (@StephenB could confirm).

[StephenB]

The file system is ext, and if it is similar to other legacy NAS, it also uses mdadm.

[Sandshark]

And, I believe, LVM.

[Breizhman]

Hello,

Thanks all of you for your message.

For the moment I have not succes to reach the data and not sure I will have success.

I have tried R-Linux without succes and so tried R-studio.

With R-studio, on one of the disks I find previous partitions and documents which where before I format and reuse on this Nas. Like if X-Raid2 has not worked and it didn't wrote any data on this disk. And on the other disk, it seems R-Studio wil never finish to scan, he encounter a lot of disk error.
I had increasing error in internal report from the Nas and it was why I have attempt to replace disk, so I think I have minor chance to recover my datas. (I have made a backup of the majority of them but forgot some which were on separate folder, it's why I wanted to try to recover).

And when I plug in internal of the computer no one of the two disk is read by Linux directly theyr are not shown on "toher places" like others drives of the computer. But not sure if there is something to do before in Ubuntu (1st time I use Linux)