kern/83765: Adaptec 1542-CP requires plug-and-play switch setting
bacon at smithers.neuro.mcw.edu
Wed Jul 20 04:00:35 GMT 2005
>Synopsis: Adaptec 1542-CP requires plug-and-play switch setting
>Arrival-Date: Wed Jul 20 04:00:34 GMT 2005
>Originator: Jason Bacon
>Release: FreeBSD 5.4-RELEASE i386
Medical College of Wisconsin
FreeBSD lisa.neuro.mcw.edu 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Tue Jul 5 11:20:16 CDT 2005 root at lisa.neuro.mcw.edu:/usr/obj/usr/src/sys/lisa i386
The Adaptec 1542-CP host adapter apparently does not function with
the stock FreeBSD 5.x kernel unless the dip switches are set for
plug-and-play operation. IT IS NOT SUFFICIENT TO ENABLE PLUG-AND-PLAY
IN THE ADAPTEC BIOS VIA CTRL+A AT BOOT TIME. This is apparently
contrary to 4.x kernels - I discovered this when upgrading an old system
from 4.x to 5.x with a 1542-CP using static IO, IRQ and DMA
values. Fdisk complained that no disks were present.
I tried various settings in the Adaptec BIOS config. I managed to
get the disk recognized in the boot messages, but fdisk still could
not find it. Checking the manual revealed that one of the onboard dip
switches toggles plug-and-play operation. After flipping this switch,
installation went forward with no hitches.
Try installing 5.x on a 1542-CP with PNP disabled via dip switches.
Set dip switches on the 1542-CP for PNP.
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