From owner-freebsd-stable  Mon May  7 21:35: 1 2001
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Date: Mon, 7 May 2001 21:34:38 -0700 (PDT)
From: Matt Groener <root@groenquist.com>
Reply-To: Matt Groener <matt@groenquist.com>
To: Paul Murphy <pnmurphy1@home.com>
Cc: jacol@ids.gda.pl, freebsd-scsi@FreeBSD.ORG,
	freebsd-stable@FreeBSD.ORG
Subject: Re: mylex dac960pl and FreeBSD 4.3 - bus_dmamap_load
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I have been trying to get anyone to respond to this issue as well.
I have offered both my time and the fact that I own many many Mylex
cards and would be happy to test, mail them out, perform magic
tricks, etc., to get some assistance.

Greg Loomis (of vinum fame) helped me out with a problem with
Mylex RAID's and vinum, only to have it fail again at this point.
(He is not responsible for this error or Mylex drivers; I only
mention this because he bailed me out last minute and then I still
got stuck with this driver issue, which was a bummer for me).
The problem is confirmed to not be present at 4.2-RELEASE. I have
back-ported Greg's fix for 4.2-RELEASE to get around the Mylex
problem for the time being.

I am not using the Mylex card as a boot device if that is of concern.

I only have Mylex cards with 2.73 firmware or lower (they are mostly
scavenged cards from Alpha's now running in Intel chassis). It is possible
that others do not experience with problem with other Mylex cards besides
the 960's, or with newer firmware.

Anyone comment on what has changed, or can the Mylex driver maintainer
(looks to be msmith?) offer any thoughts for us stuck with cards that no
longer work?

Thanks,
-matt


On Sun, 6 May 2001, Paul Murphy wrote:

> Jacek Jędrzejczak wrote:
> 
> > <dmesg>
> > mlx0: DAC96PL, 2 channels, firmware 2.73-0-00, 4MB
> > mlxd0: <Mylex System Drive> on mlx0
> > mlxd0: 20335MB (41646080 sectors) RAID 5 (online)
> > 
> > No matter which installation process i choose (floppies - kern.flp &
> > mfsroot.flp or bootable cd) i always get this error message:
> > 
> > <debug>
> > bus_dmamap_load: Too many segs! buf_len = 0xaa0
> > mlx0: I/O error - attempt to write beyond end of drive
> > 
> 
>   I have the exact same machine with the exact same problem!
> 
>   I sure would like to know the answer too.
> 


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