RELENG_4 crash: UDMA100 drive on with old UDMA33 controller

[Doug White]

On Mon, 12 Jan 2004, Kurt D. Zeilenga wrote:

> I am having problems with RELENG_4 (cvsup last night) crashing.  I
> recently purchased a WDC WD1600JB (160GB) disk drive to attach to my
> trusty, old home server:

Try running this in loader(8) before booting the kernel:

set hw.ata.ata_dma=0

This disables DMA support. If your system runs OK with this set then you
might want to check your cabling, or try isolating your disks to their own
channels.

>  ASUS P5A-B Motherboard with integrated Acer UDMA33 controller
>  Fujitsu MPC3032AT/6018 (3GB) disk drive (channel 0 master)
>  FX322M/w03 CDROM drive (channel 0 slave)

> I presently have the WD1600JB was added as the channel 1 master
> (no slave).  It is connected to the controller using the 80
> conductor/40-pin cable provided with the drive.  (I've also
> tried to setups with the WD1600JB replacing the CDROM drive
> as slave on channel 0, using both 80/40 and 40/40 cable with
> like results.)  I have configured the BIOS (as directed in
> the WDC documents) for C/H/S for 1023/16/63 (528M).

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org