Well I've just tried an ATA100 on an ata33 board and it hung in the
BIOS. No
ways could I get it to boot.
Very odd .... I'm using a toshiba UDMA100 on DMA(33) machine just fine.
Have a look at the manufacturers' websites for info on the drives and possible utilities to set the bus speed.
I had some fun with a couple of different UDMA100 drives last year. The first one I bought would not work on DMA33 (even with the 80 pin cable - that is another thing to get right but you probably know that although I mention it just in case). Exchanged it for a different make which worked fine.
Digging around on manufacturers' web sites revealed the reason for this odd behaviour. The drive may be set to UDMA100 by default - in which case it is unlikely to work out of the box on DMA33. A DOS utility is used to configure it. Alternatively, a drive may be set to DMA33 at source and possibly not be running at optimum speed when used on a UDMA100 bus unless configured.
HTH Syd
On 15-Jul-2002 Syd Hancock wrote:
Well I've just tried an ATA100 on an ata33 board and it hung in the
BIOS. No
ways could I get it to boot.
Very odd .... I'm using a toshiba UDMA100 on DMA(33) machine just fine.
[snip] Digging around on manufacturers' web sites revealed the reason for this odd behaviour. The drive may be set to UDMA100 by default - in which case it is unlikely to work out of the box on DMA33. A DOS utility is used to configure it. Alternatively, a drive may be set to DMA33 at source and possibly not be running at optimum speed when used on a UDMA100 bus unless configured.
But how do I run the utility if the thing won't boot? I have to be able to do that first ;-(
Have a look at the manufacturers' websites for info on the drives and possible utilities to set the bus speed.
Apologies. In case it was not clear, that should of course read 'transfer rate' (of the drive) not 'bus rate' (on the m/board)
Syd
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Raphael Mankin -
Syd Hancock