My reiser4 partition died![solved]

Matheus Villela · Apprentice Joined: 25 Oct 2003 Posts: 262

Hello.

I don't know why, but i added "sys aceleration" in my mm sources just to see if it solves an agp-bridge problem, and when i rebooted(after running lilo of course) i couldn't mount my partition anymore(kernel panic).

The problem prabably was on the kernel change anyway =/

So i botted in my second Gentoo linux instalation(which i'm now) and tryied _eveything_ to fix the partiton but whit no luck

debugfs.reiser4 -C /dev/hdb1
fsck.reiser4 /dev/hdb1
fsck.reiser4 --fix /dev/hdb1
fsck.reiser4 --build-sb /dev/hdb1
fsck.reiser4 --build-fs /dev/hdb1

And it always says something like that there's a problem on the "root node" and can't fix the partition.

Probably i'll not be able to recover the partition and i'm not expecting this, so i tried to recover my files because there are lot of things that i NEED to recover. I tried with the
debugfs.reiser4 -k /path/to/file /dev/hdb1

It's ok with _small_ files, it sends to stdout the content but whem i try a file above 64kbytes debugfs.reiser4 segdefaults =/

Does someone have any idea of how can i recover my files?

codergeek42 · Posted: Wed Aug 03, 2005 9:54 pm Post subject:

Do you have backups? Reiser4 isn't widely known for its integrity, to put it nicely.

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Matheus Villela · Apprentice Joined: 25 Oct 2003 Posts: 262

Saundersx · Apprentice Joined: 11 Apr 2005 Posts: 160

Oh man, I just got on here to write the exact thing

Reiser4 blew up and took EVERYTHING with it earlier today. I did all the same steps, it scanned everything, then I was rewarded with this.

lavacano · Posted: Thu Aug 04, 2005 3:32 am Post subject:

reiser4 is the offender not mm. dont use reiser4, its known yet again to poke eyes out.
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bollucks · l33t Joined: 27 Oct 2004 Posts: 606

While reiser4 is known to be the offender here, it is also true that reiser3 has no backup of the superblock so corruption there cannot be fscked.

dev-urandom · Apprentice Joined: 24 Jun 2005 Posts: 260 Location: Huh?

Have you tried building your journal metadata to another file? It does work.

Jake · Veteran Joined: 31 Jul 2003 Posts: 1128

I wonder if these problems are related to the recent plugin set change. Supposedly if you used a kernel with the new plugins, old kenrels would be unable to read your reiser4 filesystems, and reiser4progs 1.0.4 or earlier would be broken to some unspecified degree.

dev-urandom · Apprentice Joined: 24 Jun 2005 Posts: 260 Location: Huh?

Jake · Veteran Joined: 31 Jul 2003 Posts: 1128

Matheus Villela · Apprentice Joined: 25 Oct 2003 Posts: 262

Gentoonie · Posted: Thu Aug 04, 2005 7:47 pm Post subject:

Gentree · Posted: Thu Aug 18, 2005 2:36 pm Post subject:

Jake · Veteran Joined: 31 Jul 2003 Posts: 1128

Gentree · Posted: Thu Aug 18, 2005 3:48 pm Post subject:

Jake · Veteran Joined: 31 Jul 2003 Posts: 1128

plugins are one of the killer features of reiser4. Supposedly everything is modularized, making it really easy to work on parts of the FS without disrupting other parts. Critics of reiser4 say that plugins duplicate VFS features. You can read more here. The problem, as I understand it, was that the addition of cryptcompress plugins confused fsck 1.0.4. The problem wasn't addressed very well on the list either.

Gentree · Posted: Thu Aug 18, 2005 4:43 pm Post subject:

Jake · Veteran Joined: 31 Jul 2003 Posts: 1128

juliebread · n00b Joined: 06 Feb 2005 Posts: 8

Gentree · Posted: Sun Jan 08, 2006 8:28 pm Post subject:

See this thread to save repetition here: http://forums.gentoo.org/viewtopic.php?p=2994987#2994987

I covered how I recovered my partition. This is not a tutorial it's a "serving suggestion" :wink:

I think it makes sense from what I have been able to read but I have no knowlege of the code or how the guts of R4 works.

I think it is valid and it worked for me, YMMV.

From what I saw on the R4 ML reiser4progs-1.0.3 may work as well but I have not tried. I would suggest you follow the above post first.

Post back to that thread if you have comment.

Good luck.

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RobNyc · Posted: Sun Jan 08, 2006 9:25 pm Post subject:

Anyone seen the speed difference with reiser4, reiserfs, and ext3 ?

I've seen reiser4 blazin fast leavin the others behind
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Gentree · Posted: Sun Jan 08, 2006 11:08 pm Post subject:

RobNyc · Posted: Mon Jan 09, 2006 2:27 am Post subject:

I myself am starting to just use R4 or ext3 instead of RFS .
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Gentree · Posted: Mon Jan 09, 2006 9:14 am Post subject:

I would recomend keeping root on ext3 to be sure it wont disappear next time you change your kernel .

Otherwise keep a recent clone of your root partition on another fs.

I have a fallback partition I can boot to in times of trouble . It's a lot quicker than hacking about with live CDs to recover a broken system.

You will of course need an R4 capable CD to do the copy.

There are several that handle the old R4 1.0.4 format , which is part of the reason I have locked my system to that version.

If you find yourself with 1.0.5 there is the archie mini distro liveCD that recognises the newer format.

_________________
Linux, because I'd rather own a free OS than steal one that's not worth paying for.

KX7-333 , AthlonXP1800+ @2.3GHz
AthlonXP-M on A7N8X @ 2.6/2.4GHz (winter/summer)
2.6.32-hh1 : portage ~x86

matobsk · n00b Joined: 16 Oct 2005 Posts: 64

I've been using reiser 4 as my / partition for a little over 6 months now, with no issues at all.
Apparently I've been very lucky thus far :lol:

I can, however, attest to the fragmenting problem. With each new file downloaded and new package merged, I can actually feel my system getting slower and slower.

I think I'm going to finish this emerge -u world and start making preparations to clone this partition and drop it onto a new XFS or ext3 filesystem.

Really too bad, this fs was blazing fast when I first started using it. All they need to do is re-release the repacker and I'd be good to go