From: Cerem Cem ASLAN <ceremcem@ceremcem.net>
To: linux-btrfs@vger.kernel.org
Subject: Unmountable root partition
Date: Tue, 31 Jul 2018 21:03:47 +0300 [thread overview]
Message-ID: <CAN4oSBc8zM+OZEXAGygwf3RMoyEKLmrk--_HqwMsG1HVGJCf2Q@mail.gmail.com> (raw)
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Hi,
I'm having trouble with my server setup, which contains a BTRFS root
partition on top of LVM on top of LUKS partition.
Yesterday server was shut down unexpectedly. I booted the system with a
pendrive which contains Debian 4.9.18 and tried to mount the BTRFS root
partition manually.
1. cryptsetup luksOpen /dev/sda5
Seems to decrypt the partition (there are no errors)
2. /dev/mapper/foo--vg-root and /dev/mapper/foo--vg-swap_1 is created
automatically, so I suppose LVM works correctly.
3. mount -t btrfs /dev/mapper/foo--vg-root /mnt/foo
Gives the following error:
mount: wrong fs type, bad option, bad superblock on ...
4. dmesg | tail
Outputs the following:
[17755.840916] sd 3:0:0:0: [sda] tag#0 FAILED Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[17755.840919] sd 3:0:0:0: [sda] tag#0 CDB: Read(10) 28 00 00 07 c0 02 00
00 02 00
[17755.840921] blk_update_request: I/O error, dev sda, sector 507906
[17755.840941] EXT4-fs (dm-4): unable to read superblock
[18140.052300] sd 3:0:0:0: [sda] tag#0 FAILED Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[18140.052305] sd 3:0:0:0: [sda] tag#0 CDB: ATA command pass through(16) 85
06 20 00 00 00 00 00 00 00 00 00 00 00 e5 00
[18142.991851] sd 3:0:0:0: [sda] tag#0 FAILED Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[18142.991856] sd 3:0:0:0: [sda] tag#0 CDB: Read(10) 28 00 00 07 c0 80 00
00 08 00
[18142.991860] blk_update_request: I/O error, dev sda, sector 508032
[18142.991869] Buffer I/O error on dev dm-4, logical block 16, async page
read
4.
# btrfs restore -i -D /dev/mapper/foo--vg-root /dev/null
No valid Btrfs found on /dev/mapper/foo--vg-root
Could not open root, trying backup super
No valid Btrfs found on /dev/mapper/foo--vg-root
Could not open root, trying backup super
No valid Btrfs found on /dev/mapper/foo--vg-root
Could not open root, trying backup super
We are pretty sure that no unexpected electric cuts has been happened.
At this point I don't know what information I should supply.
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next reply other threads:[~2018-07-31 19:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 18:03 Cerem Cem ASLAN [this message]
2018-07-31 23:04 ` Unmountable root partition Hans van Kranenburg
2018-08-01 4:42 ` Cerem Cem ASLAN
2018-08-01 5:32 ` Chris Murphy
2018-08-01 12:07 ` Cerem Cem ASLAN
2018-08-02 15:57 ` Cerem Cem ASLAN
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