Quantum 2080 and 540 service manuals
dkelvey at hotmail.com
Fri Nov 15 16:21:22 CST 2019
Heads getting stuck on the ramp?
Maybe it has warn a groove in the plastic. It could be the bearings on the head assembly as well.
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Chuck Guzis via cctalk <cctalk at classiccmp.org>
Sent: Friday, November 15, 2019 12:29 PM
To: allison via cctalk <cctalk at classiccmp.org>
Subject: Re: Quantum 2080 and 540 service manuals
On 11/15/19 10:51 AM, allison via cctalk wrote:
> I must have about 15 maybe more of the D540s and have found them
> to be the fastest seeking of the MFM drives and also near unbreakable.
> The oldest is about 36 years old. Use them in CP/M crates, DOS boxen,
> PDP-11s (with RQDX2/3 controllers) and Local swap for net booted
> uVAX2000 and swap file disks on uVAXII (61K blocks is more than
> enough swap space) for VMS5.44.
> I've not had stiction problems... likely because I have spares!
> Its a Murphy's law thing.
The Q540 that gets used is mounted on its side in an old Mad Intelligent
Systems box with an XT clone inside. I don't think it's stiction; the
drive spins up fine, but the initial seek fails until I cycle power a
couple of times or tap the side of the drive with a screwdriver handle.
It's of no real consequence; the contents are backed up and I have a
spare XT-IDE drive if needed. The FH MFM drives that I've owned have
slowly failed; the FH ESDI and SCSI drives have, interestingly all
continued to work.
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