From: imp@boulder.parcplace.com (Warner Losh) Subject: Re: Advice about UltraStor34F on Linux (maybe volunteering to debug) Date: Tue, 29 Jun 1993 16:29:14 GMT
In article <1993Jun28.141247.15904@nenuphar.saclay.cea.fr>
basile@soleil.serma.cea.fr writes:
>0. Do any people know what exactly is wrong with UltraStor 34F on some
>PCs (John Carr reports that it is ok for other people & PCs)? I suspect
>-without proofs it is just a feeling- a timing problem related to big
>Scsi transfers (perhaps scatter/gather?)
I've been using the UltraStor 34F for some time now and it works just
fine. I had to get a special boot disk to get it to install, but the
latest SLS works just fine. I suspect that it may be related to
people trying to put the 34F into a 50MHz machine. The VESA bus isn't
really speced that high (33 or 40 is the upper end I've been told), so
some cards might not work well at that speed.
>1. Is debugging such a device driver doable without special hardware
>devices (ie i have no oscilloscope, logical analyzer, etc)?
Yes.
>4. Is a 40Mb or 80Mb cheap (eg Conner) IDE hard disk enough for
>kernel&driver debugging?
Yes.
>5. Are there good reasons to definitely give up supporting UltraStor34F
>on Linux?
Nothing against John's driver, but the one that was in .99p8 works
quite well for me. I've beat it up quite a lot (compiling OI, linking
OB, etc) and have seen more problems on the ISA SCSI controller that
we have at work.
Warner
-- Warner Losh imp@boulder.parcplace.COM ParcPlace Boulder I've almost finished my brute force solution to subtlety.