Hi Dustin, hi Stefan,

        thanks for your quick answers. So, as Dustin said, RAIT is not really
an option, because I would need at least three(!) tape drives to write
on two at the same time. To say it in hard disk analogy, I would need
rather a "RAIT-0" setup that is obviously not possible at the moment
with Amanda.

So I think, I will either try the 'chg-multi'-setup or split my
configuration into parts. Maybe that's not the worst thing, anyway...


Thanks again,

        Ralf




Dustin J. Mitchell wrote:
> On Wed, Jul 25, 2007 at 08:11:21PM +0200, Stefan G. Weichinger wrote:
>> Ralf Auer schrieb:
>>> Hi everybody,
>>>
>>>     I'm trying to use two physical tape drives (HP Ultrium 960) with
>>> Amanda. According to the manual, I could use a tape changer (e.g.
>>> chg-multi) to get the job done, but that would write only to one disk at
>>> a time, right?
>>>
>>> I do not want to split my backup in two different configurations, so
>>> maybe you know a way how to use both tapes simultaneously in one
>>> configuration? I am pretty sure, it can be done, because otherways the
>>> 'runtapes' option in amanda.conf would not make much sense, I think...
>>>
>>> Unfortunately I did not find anything helpful about that issue in the
>>> manual or the mailing list.
>>>
>>> At the moment I am using Amanda 2.4.5 on Ubuntu 5.10 & FC3 but I would
>>> not mind to upgrade if a newer Amanda version is needed for this feature.
>> RAIT:
>>
>> http://www.amanda.org/docs/rait.html
>> http://wiki.zmanda.com/index.php/How_To:Set_Up_RAIT_(Redundant_Array_of_Independent_Tapes)
> 
> I should have mentioned RAIT, but note that with two tape drives RAIT
> will only do mirroring, not striping.
> 
> Dustin
>