14" disc media problem?

From: Joe <rigdonj_at_intellistar.net>
Date: Tue Apr 11 09:55:36 2000

Jay,

   Is that a single platter drive? Can you give me the part number for the
media? I may be able to find some. I run across HP media occasionly.

    Joe


At 09:09 PM 4/10/00 -0500, you wrote:
>I'm hoping someone can tell me something I'm missing here, cause I just
>can't believe what I'm seeing....
>
>HP7900A disc drive, using the standard media for it. The media for this
>drive is virtually identical to an RK05 cartridge. I have 4 pieces of media.
>I pulled a cartridge from the stack and tried to spin up the drive. Blowers
>come on, but when you hit the load switch the spindle just sits there. After
>three days of checking all the sensors, tracing the wires, pouring over the
>schematics, still no go.
>
>So finally on a whim (yeah, it's the first thing I should have tried) I
>pulled out the cartridge, popped the cover on the drive and defeated all the
>sensors. The drive spindle motor started like a champ. Put the cartridge
>back in - no spindle motor. However, I noticed that when the cartridge is
>in, the relay that gives AC to the spindle motor does engage correctly, but
>no spindle movement. So to make a long story short, I tried the other three
>pieces of media I have. I put in each piece of media at least 20 times -
>every time the spindle starts up fine. But, put in that first piece of
>media, the relay engages, but the spindle sits still.
>
>What gives here? What on earth could be wrong with a media cartridge that
>would cause the spindle not to move? I tried lifting up the platter slightly
>and turning it, it seems to turn just as freely in the "bad" cartridge as in
>the other three. I'm just really confused - is there something I'm missing
>here???
>
>Dazed and confused....
>
>Jay West
>
>
Received on Tue Apr 11 2000 - 09:55:36 BST