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Hello,

On Jan 31, 2007, at 17:43, Nuno Teixeira wrote:

> Well, I got 2 macs (PMG4 400 and a  mini G4 1.4 both running MacosX 
> and I'd like to run NetBSD in one of them. I don't have a PC.
> (I'm running NetBSD on 2 SE/30s about 2 years but I need more power:)
>
> I'm getting some problem with PMG4 with a Promise Ultra133/ATA:
>
> ---------
> pdcide0: Promise Ultra133/ATA Bus Master IDE Accelerator (rev. 0x02)
> pdcide0: bus-master DMA support present
>
> wd0 at atabus0 drive 0: <ST3250823A>
> wd0: drive supports 16-sector PIO transfers, LBA48 addressing
> wd0: 232 GB, 484521 cyl, 16 head, 63 sec, 512 bytes/sect x 488397168 
> sectors
>
> ==>  wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 
> (Ultra/100)
>
> wd0(pdcide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) 
> (using DMA)
> wd1 at atabus2 drive 0: <WDC AC26400R>
> wd1: drive supports 16-sector PIO transfers, LBA addressing
> wd1: 6149 MB, 13328 cyl, 15 head, 63 sec, 512 bytes/sect x 12594960 
> sectors
> wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
> wd2 at atabus2 drive 1: <Maxtor 90432D2>
> wd2: drive supports 16-sector PIO transfers, LBA addressing
> wd2: 4121 MB, 8374 cyl, 16 head, 63 sec, 512 bytes/sect x 8440992 
> sectors
> wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
> wd1(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4 
> (Ultra/66) (using DMA)
> wd2(wdc0:0:1): using PIO mode 4, DMA mode 2, Ultra-DMA mode 2 
> (Ultra/33) (using DMA)
>
> ==> wd0: transfer error, downgrading to Ultra-DMA mode 4

Sounds like a cable problem. On the other hand ATA66 vs. ATA100 is 
hardly a loss, I doubt that any of the other drives could even come 
close to saturating an ATA33 channel.

> wd0(pdcide0:0:0): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using 
> DMA)
> wd0c: error reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
> wd0: (aborted command, interface CRC error)
> wd0: soft error (corrected)
> boot device: wd1
> --------

Ok, this likely IS a cable problem. Other operating systems probably 
wouldn't complain here and just silently downgrade transfer speed.

> Anyway, my PMG4 is very slow compared to mac mini. I will compile and 
> use KDE, etc. Maybe I get better results with mini.

I'm using KDE 3.5.whatever on a 333MHz G3 - compiling is slow but using 
it is fine. If you have a Radeon and enable XRENDER acceleration it 
should be fairly snappy on the G4.

So, what's the matter with the Mini?

have fun
Michael
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