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Subject[BUG] fs/jbd/checkpoint.c:427: "blocknr != 0"
Hi!

I got the following error message after trying to mount my data-partition.

Assertion failure in cleanup_journal_tail() at fs/jbd/checkpoint.c:427:
"blocknr != 0"
------------[ cut here ]------------
kernel BUG at fs/jbd/checkpoint.c:427!
invalid operand: 0000 [#1]
PREEMPT SMP
Modules linked in: ds yenta_socket pcmcia_core ide_cd cdrom usb_storage
scsi_mod psmouse evdev pcspkr adm1021 i2c_i801 i2c_sensor i2c_dev
i2c_core natsemi crc32
CPU: 1
EIP: 0060:[<c01a9df4>] Not tainted VLI
EFLAGS: 00010282 (2.6.8-rc1-mm1)
EIP is at cleanup_journal_tail+0x12c/0x185
eax: 0000005a ebx: ddd3e000 ecx: c032b9bc edx: c032b9bc
esi: 00000000 edi: dfd09a00 ebp: 0004e110 esp: ddd3fda8
ds: 007b es: 007b ss: 0068
Process mount (pid: 8635, threadinfo=ddd3e000 task=df64e0b0)
Stack: c02fdd80 c02ebf6f c02fcba4 000001ab c02fcbcb ddd3e000 dfd09a00
ddd3e000
00000000 c01acd79 dfd09a00 c011bda0 ddd3fdd8 ddd3fdd8 00003c70
dfd09a14
c03de41f dfd09a00 dfd07400 dfa39400 dfa39400 c019f39a dfd09a00
c02feca8
Call Trace:
[<c01acd79>] journal_flush+0x101/0x385
[<c011bda0>] autoremove_wake_function+0x0/0x57
[<c019f39a>] ext3_mark_recovery_complete+0x33/0x81
[<c019e957>] ext3_fill_super+0x892/0xbcf
[<c016004e>] get_sb_bdev+0x120/0x153
[<c019f8e4>] ext3_get_sb+0x2f/0x33
[<c019e0c5>] ext3_fill_super+0x0/0xbcf
[<c0160273>] do_kern_mount+0x57/0xd3
[<c0177ab5>] do_new_mount+0x9c/0xe0
[<c0178205>] do_mount+0x145/0x194
[<c0178067>] copy_mount_options+0x63/0xbc
[<c01786a0>] sys_mount+0xd4/0x158
[<c01050fb>] syscall_call+0x7/0xb
Code: 44 24 10 cb cb 2f c0 c7 44 24 0c ab 01 00 00 c7 44 24 08 a4 cb 2f
c0 c7 44 24 04 6f bf 2e c0 c7 04 24 80 dd 2f c0 e8 e3 4a f7 ff <0f> 0b
ab 01 a4 cb 2f c0 e9 3f ff ff ff e8 fd d7 13 00 e9 2d ff
<6>note: mount[8635] exited with preempt_count 2

I'm using 2.6.8-rc1-mm1 but experience the same problem with a 2.4 and
2.6.7 kernel. Every other partition can be mounted without any problems.
I ran fsck on the partition but no errors where found.

What can I do to rescue my data?
I do have backups but some recent work will otherwise be lost. :-(

Thanks!


Greetings from Germany,

Franz Pletz

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