On Tue, Nov 26, 2002 at 10:18:28AM +1100, Cameron Hutchison wrote: > There is another tool called xfs_repair that is used to repair XFS > filesystems.
The problem with xfs_repair is that it can't be used on a mounted filesystem (even mounted read-only). This means, of course, that if your root filesystem is XFS and gets screwed up, you're in trouble. You'll have to boot to an alternate root and use xfs_repair from there. I also wish that XFS (and others, really) could give some indication about when data corruption occurred. I used to run a Debian mirror on an XFS filesystem, and started getting reports of bad checksums on .debs pulled from it. It turns out that the machine went down due to a power outtage in the middle of a mirror update, which caused all sorts of filesystem corruption. When the machine was brought back up, there was no sign of trouble so I didn't think any more about it. It turns out that I should have. FWIW, that mirror is now running ext3, and I have nothing bad to say about it. While on this topic, I was at a presentation on Linux filesystems at the USENIX Annual Tech. Conference in California in June. A lot of comparisons were done between XFS, ext2, ext3, reiserfs, and JFS. The conclusions they presented were that reiserfs is really good with lots of little files, XFS is really good with multi-gigabyte files, and ext2/3 are good for all-around stuff. For the average Linux user (and that includes the average Linux server), the other filesystems really aren't going to give you anything that ext2/3 doesn't give you. noah -- _______________________________________________________ | Web: http://web.morgul.net/~frodo/ | PGP Public Key: http://web.morgul.net/~frodo/mail.html
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