Yes, you can do rait:{tape:...,file:...,null:}.
At the moment you still can't do nested RAIT's, but thats just a
parser problem (we need to teach the code to skip nested {}
braces when looking for commas...)

-----
Marc Mengel <mengel AT fnal DOT gov>

On Thu, 28 Nov 2002, C. Chan wrote:

> Also Sprach Paul Jakma:
>
> >
> > ooh wow. RAIT can do RAID1 aswell as RAID3 (or is it 4?)? yippee!
> >
>
> Yes, it can. Do a search on Marc Mengel's posts on the Amanda
> list from about a month ago. Just list two tape drives using
> the rait: driver. If you list a third it will do RAIT 4, if
> the third tape device is null: it will toss away parity
> and do a RAIT 0 across two drives (with the overhead of the
> parity calculation however).
>
> >
> > unfortunately we dont.. so RAIT wont work. the mirror and the local
> > tape backup have to be decoupled. :(
> >
>
> How does your bandwidth compare with just doing RAIT 1 on site
> and shipping the tapes offsite? If you want Amanda to write to
> a tape drive off site over a low-bandwidth link then it will
> be very slow and you won't really be mirroring. That remote
> tape drive won't do much for you unless you can stream to it;
> LTO or SuperDLT may stream at 20MBps but if your link is
> only 128kbps be prepared to watch that tape drive backhitch
> and shoeshine like an American blue collar laborer under the
> Bush Jr. economy.
>
> > (either that or we have to find a rainbow with a pot of gold so we can
> > buy fibre across the irish sea! :) )
> >
>
> The FedEx leprechauns might be satisfied with less.
>
> > regards,
> > --
> > Paul Jakma  Sys Admin       Alphyra
> >     paulj AT alphyra DOT ie
> > Warning: /never/ send email to spam AT dishone DOT st or trap AT dishone 
> > DOT st
> >
>
> ----
> C. Chan <c-chan AT uchicago DOT edu>
> GPG Public Key  ( pgp.mit.edu | finger cchan AT vader.bsd.uchicago DOT edu )
> "Lif is laene: eal sceaceth, leoht ond lif samod"
>
>