[121] in linux-scsi channel archive
Re: ISA card in PCI machine
daemon@ATHENA.MIT.EDU (Richard Gooch)
Tue Mar 28 15:04:22 1995
From: Richard Gooch <rgooch@rp.CSIRO.AU>
Date: Tue, 28 Mar 1995 12:19:35 +1000
To: linux-scsi@vger.rutgers.edu
Cc: hooft@EMBL-Heidelberg.DE
In-Reply-To: <199503270918.LAA00482@nu.EMBL-Heidelberg.DE>
hooft@EMBL-Heidelberg.DE writes:
> I'm very happy to have upgraded from an ISA machine (486/33) to a PCI
> based machine (P90) last week. But there is one catch: I'm still using
> my ISA based Adaptec 1542C...
>
> It seems that the ISA performance of my PCI motherboard is very poor:
> I get a maximum throughput of 1MB/sec using
>
> dd if=/dev/sda of=/dev/null bs=1024k count=100
>
> This used to be 1.7MB/s on the same disk using my 3 year old ISA
> motherboard.
>
> Does anyone have a suggestion (apart from a $350 upgrade) how this
> could be improved?
Yeah, buy an NCR 53c810 PCI SCSI adaptor. A$70 (probably DM80).
Some data:
CPU Drive Size (MBytes) Time Rate (MBytes/s)
=====================================================================
P90 ST42100 80 38.9s 2.06
P100 ST42100 1800 12m 47s 2.35
P100 ST41200N 80 41s 1.95
Regards,
Richard....
