Subject: mpt driver failure with dual/single channel not single/single channel
To: None <firstname.lastname@example.org>
From: None <email@example.com>
Date: 04/28/2005 09:18:13
I am trying to debug a system that may be triggering a problem with
the mpt driver. This is a follow-up to the issues reported in
contains more detailed information such as dmesg output from the
The system in question has an on-board single-channel LSI Logic
53c1030 Ultra320 SCSI chip that is detected as mpt0 by the kernel. To
that I am adding one of the following (each are also detected by the
- An additional PCI-X card with a dual-channel LSI Logic 53c1030
Ultra320 SCSI chip, or
- An additional low-profile card with a single-channel configuration
apparently just like the motherboard.
In the former (i.e., one single- and one dual-channel SCSI) case, the
kernel crashes whenever the first of the two on-board gigabit ethernet
chips (Broadcom BCM5703X Gigabit Ethernet, bge driver) is enabled. In
the latter (i.e., two single-channel SCSI) case, however, everything
seems to work fine.
This raises several questions for which I would really appreciate some
- How might the kernel handle the mixed dual/single channel case
differently from the two single channel case?
- Can you suggest any debugging steps that could help narrow down the
- Would direct access to the machine help anyone discover solutions to
By the way, this is all with a quad opteron board running the NetBSD
v2.0.2/amd64 GENERIC.MP kernel or with slight modifications to wire
down the ethernet devices.
Any suggestions you can offer are greatly appreciated.
Thanks for your help.