Hello, I hope this is the correct mailing list. I have btrfs running on a 6TB (5.5ish TiB) raid10 array on a 3ware 9750-4i controller. I decided to run a script and a got 5 checksum errors for the same file (errors from dmesg below). I deleted the file without any issues, reran scrub, and now I don''t see any errors. The file itself was unimportant as it was from a backup of another box that I already have multiple backups of (and the box itself is still fine). The disks in the array appear to all be fine and the array is also healthy. I also run "verify" regularly. Verify appears to be the controller''s equivalent to scrub. Additionally, according to smartctl, things are healthly although it seems error logging isn''t supported: Vendor: LSI Product: 9750-4i DISK Revision: 5.12 User Capacity: 5,999,977,037,824 bytes [5.99 TB] Logical block size: 512 bytes Logical Unit id: 0x600050e016538a004567000011970000 Serial number: 9XK0C13D16538A004567 Device type: disk Local Time is: Wed Aug 14 15:15:42 2013 PDT Device supports SMART and is Disabled Temperature Warning Disabled or Not Supported SMART Health Status: OK Error Counter logging not supported Device does not support Self Test logging Any idea what may have happened here? Is this something to worry about? Thanks, -Cameron [101511.280510] btrfs: checksum error at logical 1590664605696 on dev /dev/sda3, sector 3119366104, root 681, inode 1668516, offset 3473408, length 4096, links 1 (path: path/to/some/file) [101511.288676] btrfs: bdev /dev/sda3 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 [101511.291611] btrfs: unable to fixup (regular) error at logical 1590664605696 on dev /dev/sda3 [101511.390081] btrfs: checksum error at logical 1590664609792 on dev /dev/sda3, sector 3119366112, root 681, inode 1668516, offset 3477504, length 4096, links 1 (path: path/to/some/file) [101511.399321] btrfs: bdev /dev/sda3 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0 [101511.402552] btrfs: unable to fixup (regular) error at logical 1590664609792 on dev /dev/sda3 [101511.406038] btrfs: checksum error at logical 1590664613888 on dev /dev/sda3, sector 3119366120, root 681, inode 1668516, offset 3481600, length 4096, links 1 (path: path/to/some/file) [101511.416438] btrfs: bdev /dev/sda3 errs: wr 0, rd 0, flush 0, corrupt 3, gen 0 [101511.420050] btrfs: unable to fixup (regular) error at logical 1590664613888 on dev /dev/sda3 [101511.424238] btrfs: checksum error at logical 1590664617984 on dev /dev/sda3, sector 3119366128, root 681, inode 1668516, offset 3485696, length 4096, links 1 (path: path/to/some/file) [101511.435928] btrfs: bdev /dev/sda3 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0 [101511.440241] btrfs: unable to fixup (regular) error at logical 1590664617984 on dev /dev/sda3 [101511.523988] btrfs: checksum error at logical 1590664622080 on dev /dev/sda3, sector 3119366136, root 681, inode 1668516, offset 3489792, length 4096, links 1 (path: path/to/some/file) [101511.537097] btrfs: bdev /dev/sda3 errs: wr 0, rd 0, flush 0, corrupt 5, gen 0 [101511.541636] btrfs: unable to fixup (regular) error at logical 1590664622080 on dev /dev/sda3 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html