---------- Forwarded message ---------- From: Evert Vorster <evors...@gmail.com> Date: Sun, Aug 8, 2010 at 1:18 PM Subject: btrfsck: checksum verify failed To: linux-btrfs@vger.kernel.org
Hi there. I have a btrfs on a raw device. (/dev/sda insted of in a partition, like /dev/sda1 ) The device in question is a USB hard drive with a 1TB size. The device worked fine for a week or so, and was mounted and unmounted quite a few times without trouble. The last time the device was unmounted it was a normal unmount. Now, when I try to mount the device, I get the following in dmesg: usb 2-1: new high speed USB device using ehci_hcd and address 4 scsi6 : usb-storage 2-1:1.0 scsi 6:0:0:0: Direct-Access Seagate FreeAgent GoFlex 0148 PQ: 0 ANSI: 4 sd 6:0:0:0: Attached scsi generic sg2 type 0 sd 6:0:0:0: [sdb] 1953525167 512-byte logical blocks: (1.00 TB/931 GiB) sd 6:0:0:0: [sdb] Write Protect is off sd 6:0:0:0: [sdb] Mode Sense: 1c 00 00 00 sd 6:0:0:0: [sdb] Assuming drive cache: write through sd 6:0:0:0: [sdb] Assuming drive cache: write through sdb: unknown partition table sd 6:0:0:0: [sdb] Assuming drive cache: write through sd 6:0:0:0: [sdb] Attached SCSI disk device label TeraByte1 devid 1 transid 5352 /dev/sdb parent transid verify failed on 986800398336 wanted 5352 found 5355 parent transid verify failed on 986800398336 wanted 5352 found 5355 parent transid verify failed on 986800398336 wanted 5352 found 5355 btrfs: open_ctree failed Also, if I try to fsck the device, this is the output: b...@dora:~# btrfsck /dev/sdb parent transid verify failed on 986800398336 wanted 5352 found 5355 parent transid verify failed on 986800398336 wanted 5352 found 5355 parent transid verify failed on 986800398336 wanted 5352 found 5355 btrfsck: disk-io.c:739: open_ctree_fd: Assertion `!(!tree_root->node)' failed. Aborted I am using v 0.19 of the btrfs-tools, and kernel version 2.6.34.1 While a little sad that I can't get at my data anymore, I do have backups of it. I also want to use the device again, but want to stop anybody else running into the same problem. So, if you have any requests like maybe a dd of some small part of the filesystem to study and see what went wrong, and maybe how to fix it, I would be happy to oblige. However, If I hear nothing for a day or so, I'll wipe the filesystem and use the device again. Kind regards, -Evert Vorster- -- http://magnatune.com - Music shared the way it should be. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
