Re: missing files?

["Michael Styer" <michael@styer.net>]

On Fri, 4 Feb 2005, Vitaly Fertman said:
>
> so what I do not understand is why reiserfsck does not report any
> problem to you. Which reiserfsprogs do you have? have you 'umount &
> mount ro' or 'remount,ro', btw? reiser4 does not do 'remount,ro'
> properly yet. have you run fsck.reiser4 on umounted fs?

Hmm. I did 'remount,ro', actually; didn't realize that it wouldn't work
with reiser4. I have version 1.0.3 of the Gentoo reiser4progs package;
fsck.reiser4, mkfs.reiser4 and debugfs.reiser4 all report version 1.0.3.
I concluded that fsck.reiser4 wasn't reporting problems just on the
basis of the lack of problems noted in the /var/log/messages output on
boot, but I hadn't run it manually.

OK. So I killed everything that was keeping /usr busy and unmounted it.
I ran debugfs.reiser4 on /dev/hdb1 unmounted. Then I mounted the
partition ( 'mount -t reiser 4 -o ro,noatime /dev/hdb1 /usr' ). Now
debugfs.reiser4 dies with this output:

    Fatal: Can't read master super block. Error: Can't open
    reiser4 on /usr

and fsck.reiser4 says this:

    Fatal: Can't read master superblock. Fatal: Failed to open the
    reiser4 backup. Fatal: Cannot open the FileSysten on (/usr).

    1 fatal corruptions were detected in SuperBlock. Run with --build-sb
    option to fix them.

I have the output of my first debugfs run if that would be helpful. I'll
put it up for download on the same IP with the filename of
mas.devhdb1_unmounted.bz2. I'm going to reboot so that you can get that
file (this is my webserver as well...).

Regarding the output of fsck.reiser4, it suggests to run fsck.reiser4
--build-sb. What's that going to do to my filesystem? Am I likely to
lose the contents (i.e. is it like reformatting) or will it fix the
structure without causing data loss? At the minute it seems I still have
access to the filesystem, so I could tar everything up now before
rebuilding the superblock if doing so would mean losing that data.

Do you have any suggestions or advice as to what I should do from here?

Thanks very much for your help; I appreciate your taking the time to
help me out with this.

Michael

PS: I've included the list address again in case this discussion might
be helpful to anyone else.