NAS326 Volume down

Mansen84

Hi,

a few weeks ago i updatet FW to V5.21.

recently i noticed that the NAS is no longer responsive.

A reset helped but now there is no volume left. I only have one harddrive with 3TB.

I can see the disk on the WEB UI but there´s no volume.

SMART infos can be read, all looks fine.

Is there a way to save the data?

I tried to get the following information:

BusyBox v1.19.4 (2021-04-01 09:56:40 CST) built-in shell (ash)

Enter 'help' for a list of built-in commands.

 

~ # cat /proc/partitions

major minor  #blocks  name

 

   7        0     144384 loop0

  31        0       2048 mtdblock0

  31        1       2048 mtdblock1

  31        2      10240 mtdblock2

  31        3      15360 mtdblock3

  31        4     108544 mtdblock4

  31        5      15360 mtdblock5

  31        6     108544 mtdblock6

   8        0    4044975 sda

~ # cat /proc/mdstat

Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4]

unused devices: <none>

~ # cat /proc/mounts

rootfs / rootfs rw 0 0

/proc /proc proc rw,relatime 0 0

/sys /sys sysfs rw,relatime 0 0

devpts /dev/pts devpts rw,relatime,mode=600 0 0

ubi4:ubi_rootfs1 /firmware/mnt/nand ubifs ro,relatime 0 0

none /firmware/mnt/sysdisk ramfs ro,relatime 0 0

/dev/loop0 /ram_bin ext2 ro,relatime 0 0

/dev/loop0 /usr ext2 ro,relatime 0 0

/dev/loop0 /lib/security ext2 ro,relatime 0 0

/dev/loop0 /lib/modules ext2 ro,relatime 0 0

/dev/loop0 /lib/locale ext2 ro,relatime 0 0

/dev/ram0 /tmp/tmpfs tmpfs rw,relatime,size=5120k 0 0

/dev/ram0 /usr/local/etc tmpfs rw,relatime,size=5120k 0 0

ubi2:ubi_config /etc/zyxel ubifs rw,relatime 0 0

configfs /sys/kernel/config configfs rw,relatime 0 0

~ # su

 

 

BusyBox v1.19.4 (2021-04-01 09:56:40 CST) built-in shell (ash)

Enter 'help' for a list of built-in commands.

 

~ # mdadm --examine /dev/sd[abcd]3

mdadm: cannot open /dev/sda3: No such device or address

mdadm: cannot open /dev/sdb3: No such device or address

mdadm: cannot open /dev/sdc3: No such device or address

mdadm: cannot open /dev/sdd3: No such device or address

Mijzelf

Mansen84 said:

   8        0    4044975 sda

Something is really wrong with your disk. It's seen as a 4GB disk without partitions. Don't know if & how that could be solved. I would make sure that you have storage space in case the disk will be accessible again, and then try a power cycle, try the other slot, and if that still doesn't work try it in a PC (do not try to access it from Windows or MacOS, but look if it's recognized as 3TB disk with partitions) or an USB enclosure. (Same story).

Mansen84

Hi Mijzelf,

i already tried the second slot. also tried to connect to Windows PC with USB case. I can see the disk but no partitions.tried to connect to nas326 with usb, same result.

When startup WEB UI i got "Before you start using your NAS, please insert Festplatte and create at least one volume first." i think if i do this the disk will be erased?

Mijzelf

*If* the backend will try to create a volume on that 4GB disk, the current content will be lost.

I can see the disk

Which size? And related, is it possible that that 4GB disk is an usb thumb or SD card, and the disk isn't seen at all?

Mansen84

its a 3TB disk,

so i think the partition is lost. is there anyway to save the data?

Mijzelf

its a 3TB disk,

Yes I know. I meant, at which size did you see the disk when connected to the Windows PC? Your NAS sees it as 4GB, which was visible in /proc/partitions, and is also visible in your screenshot above.

When your PC sees the same size, the disk is dead, I'm afraid. When the PC sees 3TB, there might be something wrong with the NAS itself. Possibly an aging power supply. In that case your data is still there.