Hi!...
I have a serious problem with 3 of my harddrives, the fail to enter DMA mode on boot, I can force them into udma5 using atacontrol but after a few reads I will get the same error and they will fall back into PIO4 mode.
The 3 disks are in a Vinum array consisting of 6 drives, the other 3 are working fine.
....
Sometimes when I try to boot I get this error:
Fatal trap 12: page fault while in kernel mode
fault code = supervisor read, page not present
...
DMESG:
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.9-RELEASE #1: Thu Oct 30 19:09:30 CET 2003
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/SOPP
.....
atapci1: <Promise TX2 ATA100 controller> port 0xa400-0xa40f,0xa000-0xa003,0x9c00-0x9c07,0x9800-0x9803,0x9400-0x9407 mem 0xdb000000-0xdb003fff irq 7 at device 11.0 on pci0
ata2: at 0x9400 on atapci1
ata3: at 0x9c00 on atapci1
....
ad6: 194481MB <Maxtor 6Y200P0> [395136/16/63] at ata3-master UDMA100
ad7: 194481MB <Maxtor 6Y200P0> [395136/16/63] at ata3-slave UDMA100
Maybe this is related with http://www.freebsd.org/cgi/query-pr.cgi?pr=35461. Although I answered that the problem still exists the PR gets closed. Probably because others were not able to reproduce this or were not affected.
Another disk related trap 12 problem is:
http://www.freebsd.org/cgi/query-pr.cgi?pr=58391
Can you reproduce this?
Does the problem still occur if you remove one of the two Promise controllers?
Probably you should reopen the PR 35461.
Sorry, no real answers...
Alexander
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