Veritas recommends using up to 4 tape drives per HBA to avoid reducing
performance

David

-----Mensagem original-----
De: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]Em nome de David Rock
Enviada em: terca-feira, 4 de janeiro de 2005 15:19
Para: veritas-bu AT mailman.eng.auburn DOT edu
Assunto: Re: [Veritas-bu] Sizing of media by number of tape drives


* ida3248b AT post.cybercity DOT dk <ida3248b AT post.cybercity DOT dk> 
[2005-01-04
18:00]:
> Hello All
>
> I have tried to find a guide lines for sizing Solaris and AIX media
servers
> by the number of attached tape drives.
>
> I have gotten a internal work document from Veritas but it dosn't contain
the
> enterprise tape drives we are using (STK9840 and STK99940).
>
> We have 8 STK9940B drives that I want to get streaming.
>
> We have 2 AIX 5.2 Media servers and 1 Solaris Master/media server that
shares
> these 8 tapes drives, but I would each media server to be able to stream
all
> 8 drives.
>
> Does somebody on list have a set of guide lines ?
>
> or suggestions/ideas ?

We are using Sun v440's with 9940B drives and have found that they will
optimally run just under 4 drives concurrently at about 50Meg/sec. They
will run more, but at reduced speed.

--
David Rock
david AT graniteweb DOT com