NOVA4 6070 disk booboo

From: Tom Jennings <>
Date: Wed Feb 2 20:57:07 2005

>> Not gonna do that for this machine. Not all machines deserve that
>> sort of attention; this one doesn't. There's only so many
>> mountains I can move with a spoon in one lifetime; currently, that
>> will be the LGP-21.

On Wed, 2 Feb 2005, Jay West wrote:

> I only have one drive for my DG's, and I've never been fortunate enough to
> get another one so it will get the full-treatment :) Don't worry, you'll get
> a chance to laugh at me when I crash it even after being so careful *GRIN*

I'll never laugh, it's too depressing.

But you might get to -- see my next post!!

>> No servo track, reticule. I will remove the fixed platter's heads,
>> clean out the cavity and run the removable cartridge only, at
>> Bruce Ray's suggestion.

> Ok, that would be a new trick to me, but then, I have HP blinders on as I
> haven't refurbed any non-HP drives yet. But on those at least, and I would
> think the same for other fixed/removable combo drives... there is only one
> voicecoil, moving one head assembly that holds all four heads. As a result,
> you definitely can NOT run the drive with just the fixed platter. You have to
> have a working removeable pack as well. But again, perhaps the DG drive has
> independent head actuators for fixed and removable platters. Oh wait... you
> said remove the heads! Hummm I wonder if that would work on a 7900A, ala
> 7901.

There's one linear motor, with 4 heads attached. It's got a
diffraction grating on the motor; there's no servo tracks.

Bruce told me (reminded me? I think I knew once, but it was 29
years ago...) that the boot is on the *removable pack* not dp0f. F
(fixed) is generally workspace. That 10mb would be nice, but it's
not critical for operation. Removing the F heads would stop
producing FeO dust, but of course it would umm generate read
errors on the F platter seeing how there'd be no heads.
Received on Wed Feb 02 2005 - 20:57:07 GMT

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