I guess you should be able to do the math...1Gb/sec HBA = 100MB/sec
throughput and 2Gb/sec HBA = =200MB/sec.  3590-H1A's have about a 12 to 15
MB/sec throughput with a little overhead.  Just divide those numbers and
leave a little extra room.  Remember that if you're upgrading from older
drives...say E1A's or B1A's, you have to format your 3590 tapes to double
the capacity.

Michael MacGregor
Memorial Healthcare System
 


-----Original Message-----
From: Timothy Hughes [mailto:Timothy.Hughes AT OIT.STATE.NJ DOT US] 
Sent: Wednesday, December 08, 2004 2:58 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Optimal Tape drive amount using for tsm

Thanks Micheal,

I wonder is it possible to have more then 3 3590-H1A drives per 1 FC HBA
say I wanted 5 or more.  Any Ideas where I might find this information
I have a query in to IBM concerning this issue.



"MacGregor, Michael" wrote:

> We've got 3 3590-H1A drives per 1 FC HBA with 2 HBA's for a total of 6
> drives in our 3494.  Each drive has 2 interfaces for redundancy.
>
> Not sure what the optimal amount is though...maybe 2 drives per HBA if
there
> H1A's and above -> 3592-J1A's
>
> Michael MacGregor
> MHS
>
>
> -----Original Message-----
> From: Timothy Hughes [mailto:Timothy.Hughes AT OIT.STATE.NJ DOT US]
> Sent: Wednesday, December 08, 2004 2:24 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Optimal Tape drive amount using for tsm
>
> Hello all,
>
> Does anyone know what the Optimal Tape Drive amount for using FC is for
> TSM.
> for IBM 3494, 3590.
>
> How many  fibre interfaces are there  per drive?
>
> Thanks in advance!