The 2006 Linux Filesystems Workshop (Part II) [LWN.net]

The 2006 Linux Filesystems Workshop (Part II)

Posted Jul 6, 2006 9:28 UTC (Thu) by nix (subscriber, #2304)
In reply to: The 2006 Linux Filesystems Workshop (Part II) by alonso
Parent article: The 2006 Linux Filesystems Workshop (Part II)

Well...

One of the primary lessons is that file system repair tools need to reliably distinguish between metadata and things that simply look like metadata.

I propose we call this the 'reiserfsck lesson'. Does reiserfsv4 still have this, um, minor design flaw? (`Minor' in much the same way that the Pacific Ocean is `slightly damp', IMNSHO, but then I make massive use of loopback fsen so I may be biased).

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The 2006 Linux Filesystems Workshop (Part II)

Posted Jul 6, 2006 15:24 UTC (Thu) by alonso (subscriber, #2828) [Link]

Can you expain me better this point, please?
Thank you!

The 2006 Linux Filesystems Workshop (Part II)

Posted Jul 6, 2006 22:01 UTC (Thu) by adobriyan (guest, #30858) [Link]

From: Theodore Ts'o

You've obviously never kept several dozen reiserfs filesystem images
(for use with Xen or User-Mode Linux) on a reiserfs filesystem, and
then had a hardware failure bad enough that the fsck had to try to
rebuild the b-tree, I take it?

From: Hans Reiser

That is fixed in V4.  Until people start to use V4 they should compress
their V3 backup images that they store on V3, or store them on separate
partitions.  I regret that fixing it without a disk format change was
not possible.

Looks like fsck.reiserfs can liberate reiserfs filesystem image out of loopback prison and glue it to the main one.

The 2006 Linux Filesystems Workshop (Part II)

Posted Jul 7, 2006 18:31 UTC (Fri) by Tet (subscriber, #5433) [Link]

I propose we call this the 'reiserfsck lesson'.

:-) I couldn't have put it better myself...