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
>
>Gr{oetje,eeting}s,
Geert;
I've been running chg-disk for about a year, maybe longer. As you
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
assume it could be marked as no-reuse, and a new directory created
and amlabeled in its place.
In my case that would rapidly lead to my needing to get another
interface card and add anoither large drive, so I haven't explored
that path yet. I'm already using all 4 ide/atapi drives on the
motherboard.
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
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Copyright 2005 by Maurice Eugene Heskett, all rights reserved.
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