Hi Gene,
On Thu, 15 Sep 2005, Gene Heskett wrote:
> On Thursday 15 September 2005 09:11, Geert Uytterhoeven wrote:
> >On Thu, 15 Sep 2005, Jon LaBadie wrote:
> >> On Tue, Sep 13, 2005 at 07:42:36PM +0200, Geert Uytterhoeven wrote:
> >> > On Tue, 13 Sep 2005, Matt Hyclak wrote:
> >> > > On Tue, Sep 13, 2005 at 03:41:34PM +0100, Rodrigo Ventura
> enlightened us:
> >> > > > tapecycle is the total number of tapes; only these tapes are
> >> > > > rotated, right?
> >> > >
> >> > > Not exactly. tapecycle is the minimum number of tapes that will
> be
> >> > > used before any single tape can be overwritten. Many people
> have a
> >> > > tapecycle less than the total number of tapes so that if a tape
> >> > > happens to go bad, it doesn't hold everything up waiting for a
> new
> >> > > one.
> >> >
> >> > Tapecycle is also the number of slots in the virtual tape changer
> if
> >> > you use vtapes. Actually that isn't completely correct neither,
> as I
> >> > found out amtape continues scanning after the last accessed tape,
> >> > but it refuses to scan for more than tapecycle tapes in one
> >> > invocation.
> >> >
> >> > I'd like to have tapecycle different from the number of slots in
> the
> >> > virtual tape changer, so I can move vtapes offline, like with a
> real
> >> > changer. Right now the workaround is to make the number of slots
> >> > equal to tapecycle, but this makes some assumptions I'd prefer
> not
> >> > to make.
> >>
> >> I presume this is a problem in the changer script, not amtape per
> se.
> >> What changer script do you use? Any script hackers want to tackle
> it?
> >
> >chg-disk
>
> I've been running chg-disk for about a year, maybe longer. As you
Yep, me too.
> can see with ls, each virtual tape is nothing but a directory that is
> linked to as appropriate. There is nothing I can think of that would
> preclude the copying of a directory (and its associated index files)
> to one or more data dvd's in order to 'take a snapshot' for archival
> reasons. Or, if there is space available on the target drive, I
Indeed.
> assume it could be marked as no-reuse, and a new directory created
> and amlabeled in its place.
I'm working (when time permit) on a script to `intelligently' move tapes to an
offline location, and create/remove tapes on an as-needed basis, so I don't
have to do this manually anymore.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert AT linux-m68k
DOT org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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