1 Feb
2011
1 Feb
'11
4:44 p.m.
Anyone have a
manual for this drive or know how to get it work without
connecting an OCP?
How complex is the OCP? Is it possible to fake it?
-tony Browsing the link you attached reminds me of one
problem I came across
some time ago...
The drive seems to complain about the missing speed signal.
How is the speed signal generated?
Is there still an opto coupler under the drive assembly detecting the
sector impulses from a crown like mechanic coupled with the spindle?
It is perhaps worth to check the LED / photo transistor for dust.
When done verify that a proper signal is generated and transmitted to
the disk controller assembly.
Hope it will help, please keep us updated about your progress.
Bernhard Wulf
I will pull the HDA and look at the encoder next weekend.
I pulled two
RA70 disks from a pair of VAX-3500s that I have. By some
miracle both drives spin up and go ready when the Operator Control
Panel is connected. I was thinking that one of these drives would work
nicely with the UDA50 disk controller in the 11/44 until I can get the
RA81s sorted out.
These drives are supposed to work with the Operator Control Panel.
There is a button on the back of the drive that says Unit Number
Accept. I pushed the button both before and after power up, but the
RA70 does not spin up.
Anyone have a manual for this drive or know how to get it work without
connecting an OCP?
I have used RA7x drives with a KDA50 (M7164 / M7165) without an OCP
attached to the drives. ?It has been a while now. ?I don't remember
there being anything tricky about getting it to work. ?I was probably
using either an RA72 or RA73. ?I'll have to look and see if I have an
RA70 to try.
I don't remember if I ever found any RA7x drive manuals other than
this one on the net, which doesn't have all that much useful
information:
RA7x/SA7x Pocket Reference Guide, Order Number EK-RSA7X-PG-002
-Glen