[705] in linux-scsi channel archive
Re: Am I stuck with a "spare" GB!?!
daemon@ATHENA.MIT.EDU (Bas Laarhoven)
Wed Oct 18 06:44:05 1995
Date: Wed, 18 Oct 95 07:26:18 +0100
From: bas@vimec.nl (Bas Laarhoven)
To: drew@poohsticks.org
Cc: linux-scsi@vger.rutgers.edu, alb0@gte.com
> In message <9510130633.AA04858@vimec.nl>, bas@vimec.nl writes:
> >>
> >> In message <199510101913.PAA22141@ns.gte.com>, alb0@gte.com writes:
> >> >Greetings,
> >> >
> >> >I am trying to get a Seagate ST-410800N 9GB SCSI harddrive hooked
> >> >up to an old HP Vectra 486-20. I want to NFS format and export the
> >> >Seagate drive. So far, so good. It turns out that the HP Vectra has
> >> >a EISA/ISA bus, so I need to find a SCSI controller that is SCSI-II FAST
> >> >and ISA.
> >>
> >> 1. If it's EISA/ISA, you can use an EISA board.
> >>
> >> 2. If you're going to go ISA, there's no reason to go FAST SCSI-II, since
> >> you're not going to move > 5M/sec across the ISA bus.
> >
> >The latter will probably be true for the HP Vectra but doesn't stand for some
> >modern systems: My Intel Premiere II (a.k. Plato) will run reliable with
> >an Adaptec 1542CF at 10 Mb/s sync transfer speed !
>
> We're talking about different things. I'm talking about the ISA transfer
Nope, I used the word 'sync' wrongly: it should read 'dma'.
> rate, where I have yet to see a main board which will work reliably with
> a setting faster than 5.7M/second. Sync. transfer speed would be the
> data clock between the drive and the host adapter. You're still limited
> by what you can get accross the ISA bus.
Come and have a look: When my plato is ran at 66 Mhz PCI clock it is
capable to handle the 1542 at 10 Mb/s. With the PCI bus clock at 60 Mhz
I have to tune it down one step (can't remember the value though).
Bas.
>
>
