Re: Best USB2 to Ultra ATA 100 adapter card or external HDD?

Healthnut wrote:
> "Knack" <zymatikNOSPAM@yahoo.com> wrote in message
> news:77w9f.4161$yX2.1070@newsread2.news.pas.earthl ink.net...
> >I just set up what I thought was the mostly robustly constructed portable
> >3.5" HDD external enclosure for USB 2.0. The case has an extruded aluminum
> >shell with cooling ribs on two faces and vented openings on the ends for
> >air circulation. It also has an external power adapter for converting 120
> >VAC to the required DC voltages. It is a KingWin KM-H31-U2-01 (sometimes
> >called a MAP-H31 by other brands).
> >
> > Last night I used it for the first time and did a backup with it. But
> > today it won't spin up either of two brand new Ultra ATA HDDs that I've
> > tried in it.
> >
> > BTW, the transfer rate last night was terrible: averaged only 3.17 MB/sec
> > over a period of 24 mins.
> >
> Solved. I had the HDD jumpered incorrectly. Master is the correct jumpering
> for this particular enclosure. Couple nights ago I did a successful backup
> to that external HDD when it was
> configured as Cable Select. I jumpered it that way because the HDD was
> labeled with an instruction to do it that way if it is to be connected with
> an Ultra ATA cable. Unfortunately since then I couldn't get reliable spin-up
> of the HDD. I guess I was just lucky that night. I was beginning to think
> the enclosure's adapter circuitry had somehow failed since then because the
> HDD is very new, and I also tested another identicle HDD in the same
> enclosure and it also was not spinning up. So since rejumpering the HDD as
> Master I can now switch it off/on repeatedly and it spins up, and with OK
> partition detection by the laptop's WinXP.
<snip>

That's weird. My experience has been that any jumper position works.
And others too have found that. Maybe you have a slightly funny HDD or
funny adaptor.
Try other HDDs as an experiment.