Charles Galpin wrote:
>
> Hi all
>
> Well things have slowed down just enought to put some attention on my scsi
> problems. Over a month ago I built myself a system (see specs below) that
> gave me no end of trouble trying to get Linux to install on it. After some
> inital trouble NT installed and works fine. This is my first scsi system.
>
> Well, Red Hat 6.0 installed and for the most part is working fine. I still
> have a few problems that I hope will now be easier to solve with linux
> already running on it. I just saw that a new aic7xxx driver is out so I
> guess I need to upgrade to the 2.2.9 kernel and try it.
>
> I'm incluned to believe these are just termination/cabling issues, but
> have repeatedly gone over my configuration and can't find anything wrong.
> I have included the output of /proc/scsi/*, the boot messages, and the
> errors I get from xcdroast.
>
> Here are the remaining problems:
>
> 1. on bootup it times out trying to detect devices on IDs that do not have
> devices (almost all of the unused IDs). See the messages output below.
I haven't seen this before, so I'm inclined to think there is something wrong
with the card (specifically we don't appear to be getting SELTO interrupts).
However, it could also be termination related (if BSY isn't getting properly
pulled high by a lack of termination somewhere it could effect the SELTO
issue, but then in that case the regular devices should work either so this is
a super long shot).
> 2. All devices appear on channel 0. I thought the drives which are on
> the Ultra2 segment would appear on one channel, and the CDROMS on the
> Ultra segment appear on another channel.
No, you don't have a dual channel controller. Everything is on one channel.
The only reason you have 4 connectors that can all be used at the same time is
because that aic3860 chip does the job of elextrically isolating the two bus
segments, but they share the same IDs and everything else (including when a
device on one segment is talking to the SCSI controller, a device on another
segment can't also be talking to the controller).
> There are four connectors on the
> adapter. For the LVD Ultra2 segment, there are internal and external 68 pin
>connectors.
> For the SE Ultra segment, there is an internal 68 pin wide connector and
> an internal 50 pin connector. If I plug the drive cable onto the Ultra
> segment, they show up at 40.0 Mbyte/sec not 80.0 Mbyte/sec as they do on
> the Ultra2 segment. The adaptec bios just lists settings for 16 IDs, but
> does not differentiate between the segments.
That's correct. The Ultra segment is not LVD capable so the 80MByte/s drives
have to switch back to SE mode and there is a 40MByte/s speed limit if you
will for all SE busses and devices (the SE signaling technology won't reliably
go to 80MByte/s).
> 3. I can read from both CDROMs fine, but have not been able to burn a CD.
> This may be unrelated to my other problems. This is the error I get,
> /usr/X11R6/lib/xcdroast-0.96e/bin/cdrecord-1.6.1: Cannot allocate memory.
> Cannot send SCSI cmd via ioctl
> but please see the full log output below
This sounds like some sort of problem between sg and cdrecord.
--
Doug Ledford <[EMAIL PROTECTED]>
Opinions expressed are my own, but
they should be everybody's.
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