CompuServe Drives: Custom firmware?

Cory Smelosky b4 at
Sat Apr 18 02:21:11 CDT 2015

The manual did confirm WD is definitely HVD which explains my issues. 

I recall some sort of Ultra bit in it as well.

Sent from my iPhone

> On Apr 18, 2015, at 02:55, Eric Smith <spacewar at> wrote:
> My memory is probably faulty about exactly what the WD suffix means. I
> still think it's 16-bit "ultra" (1), but Wikipedia says that ultra (1)
> is single-ended or HVD, ultra 2 is LVD or HVD, and ultra 3, 320, and
> 640 are LVD only.

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