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[btrfs] Unmountable: no file system (7.0.0)

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I recently upgraded my system, and I'm encountering an issue with Disk1. It is now listed as "Unmountable: no file system." Unfortunately, it doesn't mount even when I boot into safe mode.

Since the disk is unmounted, I'm unable to run a Btrfs scrub.

 

Jan 15 18:33:13 Tower emhttpd: Mounting disks...
Jan 15 18:33:13 Tower emhttpd: mounting /mnt/disk1
Jan 15 18:33:13 Tower emhttpd: shcmd (353): mkdir -m 0666 -p /mnt/disk1
Jan 15 18:33:13 Tower emhttpd: /sbin/blkid /dev/md1p1 2>&1
Jan 15 18:33:13 Tower emhttpd: shcmd (354): rmdir /mnt/disk1
Jan 15 18:33:13 Tower emhttpd: disk1: mount error: no file system
Jan 15 18:33:13 Tower emhttpd: mounting /mnt/disk2

 

 

Edited by smithgdpr

Solved by JorgeB

  • Community Expert

Please post the output from:

 

wipefs /dev/sdd1

 

Despite the name, this command as written, won't wipe anything.

 

  • Author
5 minutes ago, JorgeB said:

Please post the output from:

 

wipefs /dev/sdd1

 

Despite the name, this command as written, won't wipe anything.

 

 

wipefs /dev/sdd1
wipefs: error: /dev/sdd1: probing initialization failed: No such file or directory

wipefs /dev/sdd
DEVICE OFFSET        TYPE UUID LABEL
sdd    0x200         gpt       
sdd    0x74702555e00 gpt       
sdd    0x1fe         PMBR      

 

  • Community Expert

Is disk1 still sdd as in the diags? If yes, post the output from:

 

fdisk -l /dev/sdd

 

  • Author
1 minute ago, JorgeB said:

Is disk1 still sdd as in the diags? If yes, post the output from:

 

fdisk -l /dev/sdd

 

The diagnostics reflect the current system :)
 

fdisk -l /dev/sdd
Disk /dev/sdd: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: TOSHIBA HDWN180 
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 0527CABE-5552-40BB-94AC-9C04EA4FC4EA

Device     Start         End     Sectors  Size Type
/dev/sdd1     64 15628053134 15628053071  7.3T Linux filesystem

 

  • Community Expert
5 minutes ago, smithgdpr said:
/dev/sdd1: probing initialization failed: No such file or directory

This error doesn't make sense, there's a partition sdd1

 

post output from

 

blkid /dev/sdd1

 

  • Author
5 minutes ago, JorgeB said:

This error doesn't make sense, there's a partition sdd1

 

post output from

 

blkid /dev/sdd1

 

blkid /dev/sdd1	#no output
blkid /dev/sdd
/dev/sdd: PTUUID="0527cabe-5552-40bb-94ac-9c04ea4fc4ea" PTTYPE="gpt"

 

 

  • Community Expert

If the array is running try stopping it first, and then retry:

 

21 minutes ago, JorgeB said:
wipefs /dev/sdd1

 

  • Community Expert

or with the array running 

wipefs /dev/md1p1

 

  • Author
1 minute ago, JorgeB said:

or with the array running 

wipefs /dev/md1p1

 

wipefs /dev/md1p1
DEVICE OFFSET  TYPE  UUID                                 LABEL
md1p1  0x0     xfs   fff50345-de61-427b-8187-81eebdee4cb7 
md1p1  0x10040 btrfs 97f8a3a9-b0a1-47e7-a062-53680695e51b 

 

 

  • Community Expert

ahh, now we have something, that is the problem, there are two signatures, you were also using btrfs for disk1 right?

  • Author
Just now, JorgeB said:

ahh, now we have something, that is the problem, there are two signatures, you were also using btrfs for disk1 right?

It's supposed to be btrfs, definitely weird

  • Author
10 minutes ago, JorgeB said:

ahh, now we have something, that is the problem, there are two signatures, you were also using btrfs for disk1 right?

 

9 minutes ago, smithgdpr said:

It's supposed to be btrfs, definitely weird

How do i proceed? Wipe and rebuild from parity?

  • Community Expert
  • Solution

If you are sure it's btrfs, you can use wipefs to wipe the xfs signature, this should be pretty safe, but always good to make sure backups are up to date first:

 

wipefs -a -t xfs /dev/md1p1

 

Then restart the array

  • Author
13 minutes ago, JorgeB said:

If you are sure it's btrfs, you can use wipefs to wipe the xfs signature, this should be pretty safe, but always good to make sure backups are up to date first:

 

wipefs -a -t xfs /dev/md1p1

 

Then restart the array

 

Tyvm! Worked like a charm.

I've no idea how that happend. It has always been btrfs...

 

Anyway, thanks for you time, I really appreciate it! Cheers. 

  • Community Expert
13 hours ago, smithgdpr said:

I've no idea how that happend.

The dual signatures mean the device wasn't properly wiped before, when it was reformatted btrfs, but it wasn't a problem with v6.12 because it ignored it.

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