[snip]
FWIW, a possible data point:
430FX mobo, P120
Adaptec 3940W (Twin wide)
2.0.31-pre9
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: IBMRISC Model: DFHSS2W Rev: 4242
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: IBMRISC Model: DFHSS2W Rev: 4242
Type: Direct-Access ANSI SCSI revision: 02
This is the 2.1 gig variety of the drive you mention. Write caching
is enabled on both of them. Other SCSI devices (Tape, CD-ROM, another
disk) are on scsi0 -- so the DFHS drives are each on their own bus.
They work 100% with tagged queuing enabled. I'm using them with md0
in a raid0.
Jeff