I've compiled with PIIX4 on and off, as well as tagged queueing on/off, and
there's no difference.
I'm using the aic7xxx driver. From my /proc/pci:
Bus 0, device 9, function 0:
SCSI storage controller: Adaptec AIC-7881U (rev 0).
Medium devsel. Fast back-to-back capable. IRQ 10. Master Capable.
Late
ncy=64. Min Gnt=8.Max Lat=8.
I/O at 0xe400 [0xe401].
Non-prefetchable 32 bit memory at 0xed000000 [0xed000000].
>From /proc/scsi/scsi:
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IBM Model: DCAS-34330W Rev: S65A
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: SEAGATE Model: ST39173LW Rev: 6246
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: iomega Model: jaz 1GB Rev: J.83
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: HP Model: CD-Writer 6020 Rev: 1.07
Type: CD-ROM ANSI SCSI revision: 02
deathstar.pclark.com:/proc/scsi {36}
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