Re: needs help, root inode gone after usb bus reset on sata disks

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Theodore Tso wrote:
On Thu, May 29, 2008 at 11:37:25AM +0200, Jelle de Jong wrote:
My humble excuse, i had to place the disk in a server and this server had an older version of the dumpe2fs tool that did not supported the superblock option. I upgraded the server and rerun all the test for you.

dumpe2fs -o superblock=32768 /dev/sda1 > dumpe2fs-superblock-32768-info-sda1.txt 2>&1 dumpe2fs -o superblock=98304 /dev/sda1 > dumpe2fs-superblock-98304-info-sda1.txt 2>&1

Unfortunately, it looks like the backup superblocks were also
corrupted, and in the same way.  Did you *ever* run e2fsck in
read/write mode (i.e., without the -n option) on this filesystem after
when you think it had gotten corrupted?

yes i made one mistake the first time i run fsck /dev/sdX i answered yes to the fist question (autoreponse), then i saw the second question and saw that it was the same issue as with the previous disk and cancel the fsck and reported my issue to the list.

So what I will suggest at this point is that you do the following:

debugfs -w /dev/sda1
debugfs: features dir_index filetype sparse_super
debugfs: quit

The run "e2fsck -nf /dev/sda1" and make the output looks relatively
clean. You should *not* see any messages about needing to relocate
inode tables.

If so, you can then run "e2fsck -f /dev/sda1 to fully recover the

I always seem to get the impossible out of Linux tools, but most times this is during quality tests... however this was on "normal usage". I hope it has noting to do with the latest release changes or with corrupt binaries on my client system.

Well, absolutely no one else reporting this problem or anything like

Ok, this did not when so great...

e2fsck -nf /dev/sda1 > e2fsck-nf-info-sda1.txt 2>&1
e2fsck -fy /dev/sda1 > e2fsck-fy-info-sda1.txt 2>&1 (log is of an second resumed run)

root@ashley:/media/sda1# ls -hal
total 8.0K
drwxr-xr-x 3 root root 4.0K 2008-05-29 15:28 .
drwxr-xr-x 5 root root  200 2008-05-29 16:10 ..
drwx------ 2 root root 4.0K 2008-05-29 15:28 lost+found
root@ashley:/media/sda1# cd lost+found/
root@ashley:/media/sda1/lost+found# ls -hal
total 8.0K
drwx------ 2 root root 4.0K 2008-05-29 15:28 .
drwxr-xr-x 3 root root 4.0K 2008-05-29 15:28 ..
root@ashley:/media/sda1/lost+found# df -hal
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             688G  8.0K  653G   1% /media/sda1

nothing there anymore :-S :-S

I am going to restore the backup image back to sda1 it is 750GB so this takes a while (14 hours)

Any ideas what went wrong?

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