Brian Arsenault wrote:
Sounds a bit like interference etc is causing the shift to a slower speed. I assume you are using an 80 wire cable rather than a 40 wire one? Any kinks or folds in it? Another cable you can try?
I can enable it - be it briefly - by passing the -X69 switch to hdparm:
[root@squirt root]# hdparm -X69 /dev/hda /dev/hda: setting xfermode to 69 (UltraDMA mode5)
Yet no matter what, a few seconds later it will reset to UDMA4.
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