On Fri, 6 Jan 2017, David Gesswein wrote:
On Fri, Jan 06, 2017 at 08:50:09PM -0500, Mike Loewen via vcf-midatlantic wrote:
Look what showed up in my driveway:
All I ever get is the neighbors newspaper.
To be fair, it took three of us to get it out of the van. :-)
HP 7935 drive, 404MB removable pack, HP-IB interface.
Do you know how touchy the higher capacity drives like this are? I've only worked with the low capacity single platter which are pretty tolerant.
This model was probably one of the last of the large capacity pack drives. As I recall from working on them in the late '80s, they were pretty solid. The media module has 7 platters: 13 data and 1 servo. According to the service manual, the drive has an automatic head alignment feature, which provides "...the capability to measure and correct for dynamic head misalignment in radial position (offset) and circumferential position (skew)."
Was the HP-IB fast enough to not limit drive performance?
Can't answer that one. I can't seem to find data transfer rates in the manuals. Mike Loewen mloewen@cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/