[wplug] Ext3 filesystem errors with RAID 1 USB drives

[nschembr at gmail.com]

On Feb 27, 2011 9:57am, Max Putas <maxblaze at gmail.com> wrote:
> I've been using BackupPC with with two 1TB USB HDs that are configured

> with software RAID 1 for a couple years now. The array works great for

> a while after a full fsck, then I start to get filesystem errors (some

> examples are below) after a few full backups. I've had this system on

> various PCs and Linux distros, so I don't think it's hardware or

> kernel dependent--unless the drives themselves are the culprits. I

> recently upgraded to Debian 6.0 (Squeeze) and thought about upgrading

> to Ext4. Do you think it would cut down on the corruption? My best

> guess so far is that there are bad writes when the USB interfaces

> hiccup every once in a while:



> [383415.112101] usb 1-4: reset high speed USB device using ehci_hcd

> and address 3



> FS errors:

> --------------------

> [1601863.389701] init_special_inode: bogus i_mode (174771) for inode

> dm-0:45777888 (Hundreds of this message)

> [1596380.877215] EXT3-fs error (device dm-0): htree_dirblock_to_tree:

> bad entry in directory #13074636: rec_len % 4 != 0 - offset=0,

> inode=2242678265, rec_len=34181, name_len=133 (This one quite often)

> [ 22.040754] dm-0: rw=0, want=22098027816, limit=1953513472 (Couple

> dozen of these errors)

> [ 21.718752] init_special_inode: bogus i_mode (31463) for inode

> dm-0:45385118 (Couple of these)

> --------------------



> --

> Thanks,



> Max Putas

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You might want to clean the usb connectors. I'm not sure ext4 would help.  
Clean power and good cables would be my first step.
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