Amanda-Users

Re: Changer policy

2008-08-21 10:27:07
Subject: Re: Changer policy
From: Ian Turner <ian AT zmanda DOT com>
To: Olivier Nicole <on AT cs.ait.ac DOT th>
Date: Thu, 21 Aug 2008 09:33:14 -0400
Oliver,

The simple answer is to use chg-manual, which waits for operator intervention. 
You will have to adjust a symlink as well as the disk connections.

If it is possible to script the disk switch, you should be able to write a 
changer script that does what you want.

--Ian

On Thursday 21 August 2008 08:55:26 Olivier Nicole wrote:
> Hi,
>
> I have a brand new Amanda server, that uses virtual tapes.
>
> My virtual tapes are set on external hard disks, but I can only
> physically connect one disk at a time.
>
> I uses runtapes 5.
>
> So I can end up in a situation where I have 2 vtapes left one a disk,
> and where I must change disk in the middle of a dump.
>
> I beleive this is close to the situation of a tape caroussel, where
> one wants to reload the caroussel in the middle of a dump.
>
> I'd like to know if the model bellow makes sense with Amanda, does it
> break the general idea or not?
>
> Will it work if I write a changer that would wait for manual change of
> the disk? The dumps would finish to the holding disks and the taper
> would wait for manual change of the disk before finishing to write on
> the tape (wait would be several hours).
>
> I see that amcheck physically tries to access the tapes, so in a
> situation with 2 tapes left on a disk and 3 tapes from the new disk,
> amcheck would request the user tou change disk, that is not really
> necessary, is there any other command that is likely to access the
> changer (beside the amdump/amflush and restore).
>
> Is there a command to get the label of the tape loaded in the tape
> device?
>
> Does it exist a changer that allow the manual change of a caroussel,
> so I don't have to redesign everything from scratch? (I mean the
> Amanda phylosophy, not the exact way to load/eject a caroussel or
> mout/unmout a disk).
>
> Best regards,
>
> Olivier
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