Boot locking on ATA setup

[Ryan Poole]

I figure I should mention this now that floppy installation of DFBSD is no
longer available. This is a problem I've had for quite some time now with
both FreeBSD 4.x and 5.x and now also with DFBSD. The FreeBSD mailing lists
have a few instances of the problem but no solutions. Here the excerpt of a
'boot -v':

---
ad0: success setting UDMA6 on VIA chip
Creating DISK ad0
ar: FreeBSD check1 failed
ad0: <Maxtor 6Y060L0/YAR41VW0> ATA-7 disk at ata0-master
ad0: 58644MB (120103200 sectors), 119150 C, 16 H, 63 S, 512 B
ad0: 16 secs/int, 1 depth queue, UDMA133
ad0: piomode=4 dmamode=2 udmamode=6 cblid=1
ad1: success setting UDMA4 on VIA chip
WARNING: "ad" is usurping "ad"'s cdevsw[]
Creating DISK ad1
ar: FreeBSD check1 failed
ad1: <WDC WD205BA/16.13M16> ATA-4 disk at ata0-slave
ad1: 19574MB (40088160 sectors), 39770 C, 16 H, 63 S, 512 B
ad1: 16 secs/int, 1 depth queue, UDMA66
ad1: piomode=4 dmamode=2 udmamode=4 cblid=1
ata1-master: piomode=4 dmamode=2 udmamode=2 cblid=1
ata1-master: success setting PIO4 on generic chip
acd0: MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices ..
---

At this point the system hangs. The system producing this message is running
on an ASUS A7V333 board with a VT8233A IDE chipset with a harddrive on
primary master and primary slave and a cddrive on secondary master and dvd
drive on secondary slave. I get the same error though on a system with an
ASUS P2L97/440LX board with a harddrive on primary master and a cddrive on
primary slave. The only way I've gotten past this is to completely remove
the cd drives from the systems, then bootup goes through without any errors

-- Ryan Poole <ryan at xxxxxxxxx>