mksnap_ffs, snapshot issues, again

[Kris Kennaway]

On Mon, Aug 18, 2003 at 10:38:47PM +0200, Branko F. Gra?nar wrote:

> # mksnap_ffs /export aaa.snap
> 
> ... after 30 minutes ... snapshot was not created (!!! On a empty
> filesystem !!!)... Ok, long snapshot creation would be fine if it
> would not hang all processes, which would like to do something on
> /export (ls /export for example.). Filesystem cannot be
> unmounted. mksnap_ffs process cannot be killed. Reboot and
> foreground fsck helps.

Please wrap your lines at 70 characters so your emails can be easily read.

The behaviour of filesystem activity stalling during snapshot creation
is intentional, but 30 minutes to snapshot an empty FS is not.  Is
there disk activity during this time?  It's not clear from your mail
whether bg fsck is in operation during this time.  If so, that's
probably the cause, since bg fsck itself uses a snapshot to check the
FS consistency.

Kris
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