Hi,

Just tried the 2.6.9 kernel (applied ac6 on it) and it wont boot. It hangs
after outputting (from 2.6.8.1 logging):
SCSI subsystem initialized
ahc_pci:0:10:0: Host Adapter Bios disabled.  Using default SCSI device
parameters
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
        <Adaptec 2902/04/10/15/20C/30C SCSI adapter>
        aic7850: Single Channel A, SCSI Id=7,3/253 SCBs

whereas the 2.6.8.1 continues here and outputs:

SCSI subsystem initialized
ahc_pci:0:10:0: Host Adapter Bios disabled.  Using default SCSI device
parameters
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
        <Adaptec 2902/04/10/15/20C/30C SCSI adapter>
        aic7850: Single Channel A, SCSI Id=7,3/253 SCBs

(scsi0:A:3): 10.000MB/s transfers (10.000MHz,offset 15)
  Vendor: HP        Model: C1537A            Rev: L708
  Type:   Sequential-Access                  ANSI SCSI revision: 02
st: Version 20040403, fixed bufsize 32768, s/g segs 256
 Attached scsi tape st0 at scsi0, channel 0, id 3, lun 0
st0: try direct i/o: yes (alignment 512 B), max page reachable by HBA 104857

and works fine afterwards.
Host is a Dual PIII, running Debian/testing (gcc-3.3.4)

Regards,

Koos