[lug] hdparm and udma (fixed)

[Ben]

On Fri, 2007-01-05 at 22:55 -0700, Ben wrote:
> I just bought a new hard drive (EIDE) and installed it as the secondary
> master. I compared original EIDE hard drive with 'hdparm -t /dev/hd[ac]'
> and both got ~60MB/s. Great. Then when I copied my data between the
> drives, I switched the new hard drive to be my primary (master), and the
> old to be my secondary (master). I then ran the same speed test on both
> drives, and my old drive (now hdc) is getting 30MB/s. The commands are
> shown below, but when I run hdparm -i /dev/hdc it is set to udma2 mode,
> but supports up to udma6. When I set it to udma5 or 6 (hdparm -X udma6)
> it says it has set the drive to udma5, but hdparm -i shows that nothing
> has changed (udma2). Now my hda drive is using udma5, so my kernel and
> motherboard support the higher speed. And since I was getting 60MB/s on
> both drives I don't think it is primary vs secondary issue, but I don't
> know. Any ideas? 
> 

Sorry to bother everybody. Turns out it was a loose cable and the
computer thought I had a 40, not 80 pin connector.


Thanks,

Ben