Hmmm...

You mean this? (note error: "transfer error, downgrading to Ultra-DMA mode 2")

Aug 21 07:37:06 grace /netbsd: tlp0 at pci0 dev 14 function 0: DECchip 21140A Ethernet, pass 2.2
Aug 21 07:37:06 grace /netbsd: tlp0: interrupting at irq 24
Aug 21 07:37:06 grace /netbsd: tlp0: Ethernet address 00:00:94:a0:bd:93
Aug 21 07:37:06 grace /netbsd: tlp0: 10baseT, 100baseTX, 10baseT-FDX, 100baseTX-FDX
Aug 21 07:37:06 grace /netbsd: pciide0 at pci0 dev 15 function 0: Promise Ultra133/ATA Bus Master IDE Accelerator (rev. 0x02)
Aug 21 07:37:06 grace /netbsd: pciide0: bus-master DMA support present
Aug 21 07:37:06 grace /netbsd: pciide0: primary channel configured to native-PCI mode
Aug 21 07:37:06 grace /netbsd: pciide0: using irq 25 for native-PCI interrupt
Aug 21 07:37:06 grace /netbsd: wd1 at pciide0 channel 0 drive 0: <ST380011A>
Aug 21 07:37:06 grace /netbsd: wd1: drive supports 16-sector PIO transfers, LBA48 addressing
Aug 21 07:37:06 grace /netbsd: wd1: 76319 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
Aug 21 07:37:06 grace /netbsd: wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
Aug 21 07:37:06 grace /netbsd: wd1(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)
Aug 21 07:37:06 grace /netbsd: pciide0: secondary channel configured to native-PCI mode
Aug 21 07:37:06 grace /netbsd: obio0 at pci0 dev 16 function 0: addr 0xf3000000
Aug 21 07:37:06 grace /netbsd: mesh0 at obio0 offset 0x10000 irq 12: 50MHz, SCSI ID 7
Aug 21 07:37:06 grace /netbsd: scsibus0 at mesh0: 8 targets, 8 luns per target
Aug 21 07:37:06 grace /netbsd: bm0 at obio0 offset 0x11000 irq 42,33: address 00:05:02:cd:62:78
[stuff deleted....]
Aug 21 07:37:06 grace /netbsd: wdc0 at obio0 offset 0x20000 irq 13: DMA transfer
Aug 21 07:37:06 grace /netbsd: wd0 at wdc0 channel 0 drive 0: <ST380023A>
Aug 21 07:37:06 grace /netbsd: wd0: drive supports 16-sector PIO transfers, LBA addressing
Aug 21 07:37:06 grace /netbsd: wd0: 76319 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
Aug 21 07:37:06 grace /netbsd: wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
Aug 21 07:37:06 grace /netbsd: wd0(wdc0:0:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)
Aug 21 07:37:06 grace /netbsd: wdc1 at obio0 offset 0x21000 irq 14: DMA transfer
Aug 21 07:37:06 grace /netbsd: atapibus0 at wdc1 channel 0: 2 targets
Aug 21 07:37:06 grace /netbsd: cd0 at atapibus0 drive 0: <MATSHITA CR-587, , 7S14> type 5 cdrom removable
[stuff deleted....]
Aug 21 07:37:06 grace /netbsd: root file system type: ffs
Aug 21 07:37:06 grace /netbsd: wd1: transfer error, downgrading to Ultra-DMA mode 2
Aug 21 07:37:06 grace /netbsd: wd1(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA data transfers)
Aug 21 07:37:06 grace /netbsd: wd1c: error reading fsbn 0 (wd1 bn 0; cn 0 tn 0 sn 0), retrying
Aug 21 07:37:06 grace /netbsd: wd1: (aborted command, interface CRC error)
Aug 21 07:37:07 grace /netbsd: wd1: soft error (corrected)
Aug 21 07:37:06 grace savecore: no core dump

Is this something to be concerned about?  So far, I've seen no ill effects, and
have assumed that it would only affect performance.  In fact, I
presumed that it was part of the "negotiation" sequence
with a drive that does not actually support ATA/133 (It's
an ATA/100 drive)

-dgl-

At 10:46 PM +0200 9/20/03, Manuel Bouyer wrote:
>On Fri, Sep 19, 2003 at 01:00:50PM -0500, Joe Laffey wrote:
>> Anyone know if a Promise U100 ATA card would work in a PowerTower Mac
>> running NetBSD? I would love some more drive space, and don't wat to
>> spring for SCSI drives on this old hardware.
>
>Various promise adapters have show strange behaviors when not used in
>i386 hosts. I would use something else if possible
>
>-- 
>Manuel Bouyer <bouyer@antioche.eu.org>
>     NetBSD: 24 ans d'experience feront toujours la difference
>--