Adaptec AIC-7901 (ahd) broken with 6.0-BETA2

Hi All,

I believe the support for Adaptec's AIC7901 is broken in 6-BETA2.
I had a Dell running with this Controller in RELENG_5 and in Current 
from June 7th.
Some detailed information:
ahd0_at_pci2:14:0: class=0x010400 card=0x01681028 chip=0x808f9005 rev=0x10 
hdr=0x00
     vendor   = 'Adaptec Inc'
     device   = 'AIC-7901 Ultra320 HostRAID Controller'
     class    = mass storage
     subclass = RAID

uname as of my last running 6-CURRENT Kernel:
([mhettwer_at_siteop-8] <~>)$ uname -a
FreeBSD siteop-8.mobile.rz 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Tue Jun 
7 15:30:11 CEST 2005 
root_at_siteop-8.mobile.rz:/usr/obj/usr/src/sys/GENERIC  i386

The "boot -v" of 6-BETA2 bootonly stops with the following messages 
(written down by hand, since I had no serial access):

(probe20:sbp0:0:5:0): error 22
(probe20:sbp0:0:5:0): Unretryable Error
(probe21:sbp0:0:6:0): error 22
(probe21:sbp0:0:7:0): Unretryable Error
ahd0: Selection Timeout on A:4. 0 SCBs aborted
ahd0: Selection Timeout on A:8. 0 SCBs aborted
ahd0: Selection Timeout on A:11. 0 SCBs aborted
ahd0: Selection Timeout on A:13. 0 SCBs aborted
ahd0: Selection Timeout on A:2. 0 SCBs aborted
ahd0: Selection Timeout on A:3. 0 SCBs aborted
ahd0: Selection Timeout on A:5. 0 SCBs aborted
ahd0: Selection Timeout on A:6. 0 SCBs aborted
ahd0: Selection Timeout on A:9. 0 SCBs aborted
ahd0: Selection Timeout on A:10. 0 SCBs aborted
ahd0: Selection Timeout on A:12. 0 SCBs aborted
ahd0: Selection Timeout on A:14. 0 SCBs aborted
ahd0: Selection Timeout on A:15. 0 SCBs aborted
(probe1:ahd0:0:1:0): Retrying Command
(probe0:ahd0:0:0:0): Retrying Command
(ahd0:A:0:0): Sending PPR bus_width 1, period 8, offset fe, ppr_options fb
(ahd0:A:0:0): Received PPR width 1, period 8, offset 7f, options c3
     Filtered to width 1, period 8, offset 7f, options c3
ahd0: target 0 using 16 bit
ahd0 target 0 synchronous with period = 0x8, offset = 0x7f(DT IU RTI)


I'd really like continue testing FreeBSD 6 on this Dell Machine... but I 
have no IDE disks to boot from, and besides, FreeBSD was running before 
with the very same controller on this box ...

Is there any more information I could provide ?

best regards,
Marian