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Re: dump won't dump an fss snapshot on netbsd-5
On Mon, Jul 27, 2009 at 05:28:34PM -0400, Louis Guillaume wrote:
> Hi Juergen,
> Juergen Hannken-Illjes wrote:
> >On Sun, Jul 26, 2009 at 10:13:09PM -0400, Louis Guillaume wrote:
> >>I just updated the machine connected to my tape drive from netbsd-4
> >>(stable) to netbsd-5 (stable). Now dump will not back up my fss
> >The /dev/fss? devices will not allow multiple opens. To dump a snapshot
> >please use the -x / -X flags. In your example it would be:
> > dump -L maat-home -b 32 -0eautf /dev/nrst0 -x /var/tmp/maat-home /home
> This appears to work properly, however I have no indication that a
> snapshot was made or even used aside from this:
> [16:42:52 EDT] DUMP: Dumping a snapshot of /dev/rld0g (/home) to
> Is it safe to assume that I don't have to create the snapshot with
> fssconfig first? And that dump takes care of that for us? It's not
> really clear in dump(8).
Yes and yes. You could run "fssconfig -lv" and "systat vmstat" during
dump to see a fss device working ...
> Another thing - fss in general (both via dump and by itself) is
> considered "experimental" but I haven't had much trouble with this until
> now. Is this because there has been limited testing? Limited resources
> to maintain/develop it? Perhaps it's not as stable on ports other than
Limited testing. While I'm running snapshot dumps daily on all my
NetBSD machines I'm not aware of others using it on a regular basis.
> I consider this a very important feature and would like to see it
> considered "stable". It would also be good to get rid of some ironic
> (albeit funny) documentation in the manual, such as:
> -x snap-backup
> Use a snapshot with snap-backup as backup for this dump. See
> fss(4) for more details. Snapshot support is experimental. Be
> sure you have a backup before you use it.
> ... from the dump(8) page.
This is NOT meant ironic -- be sure you have a (non-snapshot) dump before
you try it.
> Thanks for your help. Any further clarifications would be most appreciated.
Juergen Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig
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