Re: FFS snapshot on 5.0_STABLE pondering

[Adam Hoka <adam.hoka%gmail.com@localhost>]

On Thu, 22 Apr 2010 20:54:37 -0400
"Martin S. Weber" <Ephaeton%gmx.net@localhost> wrote:

> Just a quick question: Is it intended behaviour for a snapshot created
> on 5.0_STABLE via fssconfig that the directory hierarchy inside also
> extends to the mounted directories beneath? Even without a changed
> device id? There is nothing about that in the manpages.
> How does it make a difference?
> 
> Say, e.g., you have /usr and /usr/src on different devices. Then
> you create a snapshot of /usr and use pax -rw with the -X option 
> on it. Or rsync -x ... expecting to NOT see </dev/fss0>/src contents
> being transferred. Well. You WILL see src contents being transferred,
> as obviously the usual "living on a different device" logic for pax,
> rsync, find et al won't work on the mounted snapshot.

pax/rsync uses st_dev to check what device its on, and it will be fss0 for
both /usr and /usr/src I'm affraid. So short answer: yes.

> While at it: Is it normal that if you mount the snapshot it's unclean?
> "/dev/fss0: file system not clean (fs_clean=0x4); please fsck(8)
>  /dev/fss0: lost blocks 0 files 0"
> 
> Thanks for your input.
> 
> Regards,
> 
> -Martin


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