I almost sent this to freebsd-hackers, so please direct me there is that
list is more appropriate. I am seeing some problems with soft-updates
and fsck (I believe) so I have a couple of questions.
Can anyone tell me src/sys/ufs/ffs/README.softupdates and
README.snapshots are up to date? The former is dated June 2000, so it's
almost 7 years old. The snapshots readme is only 2 years younger and
mentions the code being alpha-test.
The problems I'm seeing in 6.1 are:
1. After writing a lot if data/files to a filesystem with soft-updates
enabled, then unmounting or remounting it:
update error: /: blocks <n> files <y>
It appears others have seen this too. It appears that an attempt to
flush the buffers to disk as part of the unmount failed. Is this a
2. I was planning to use soft-updates and then have fsck run in the
background if necessary on reboot to reclaim any lost blocks (as
suggested by Kirk's whitepaper(s)). Normally the filesystem in question
would be mounted read-only, but will be mounted read-write at times and
remounted read-only. Will a background fsck work on a filesystem
mounted read-only? Will it operate on a snapshot and if so, can or how
does it replace the existing filesystem when the snapshot is corrected?
Any advice much appreciated.
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