10 Jun
1999
10 Jun
'99
12:51 a.m.
John wrote:
I have two RL11 cards, one RL11 -> RL02 cable and
connectors, and
nine (9) RL02 drives.
You should also have at least one RL cable terminator, too!
Small hint for those needing more RL11-ribbon-cable-to-RL02-round cable
adapters: you can make two of these from each busted RL02 drive you have!
Bill suggested:
Been a long time, but it sounds to me like the cable on
the RL11
may be reversed at the transition block.
I, too, suspect a possible cabling problem.
I'd flip it. I don't think it does any harm.
I can guarantee that it won't do any harm. Indeed, I do my RL cabling
by such trial-and-error. (Same goes for Pertec formatted tape drive
cables... many edge connectors have a polarizing slot in them, but there
are several different standards for where the slot goes, making it
useless for folks like me with so many different makes and models of
Pertec formatted drives!)
One other issue... check the round cable for bent pins.
Another question that comes to mind, which may have been answered before:
there is a terminator on the back of the RL02 drive, right? It doesn't
hurt to open up the terminator and make sure that it really is one! A
real RL terminator has a many-legged resistor pack inside it.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
10 Jun
10 Jun
2:58 a.m.
Thanks for the replies so far: I have condensed my responses thus:
On Thu, 10 Jun 1999 CLASSICCMP(a)trailing-edge.com wrote:
Done that. All fine.
I still think I'm at the point where I would like to speak with
someone who really knows these devices from having worked with/on
them... I can do just so much with installation manuals and printsets.
Cheers
John
John wrote:
Ah, yes. For once, I have tried to do all the obvious (to me)
things before asking for help... it was late last night when I
posted... I neglected to add:
The drive is terminated with a valid RL02 terminator.. I have
checked and rechecked the cable, and run it reversed (on both ends)
just for grins, and I have verified that the 'door closed' switch
mechanism is in fact sensing top down and pack cover installed on
top of the pack.
I have two RL11 cards, one RL11 -> RL02 cable
and connectors, and
nine (9) RL02 drives.
You should also have at least one RL cable terminator, too!
Small hint for those needing more RL11-ribbon-cable-to-RL02-round cable
adapters: you can make two of these from each busted RL02 drive you have!
Cool! Cue Johnny Carson Imitation: "I didn't know that...."
Bill suggested:
Other possibility is that the cable is open somewhere...
Been a long time, but it sounds to me like the
cable on the RL11
may be reversed at the transition block.
I, too, suspect a possible cabling problem.
I'd flip it. I don't think it does any
harm.
I can guarantee that it won't do any harm.
Indeed, I do my RL cabling
by such trial-and-error. (Same goes for Pertec formatted tape drive
cables... many edge connectors have a polarizing slot in them, but there
are several different standards for where the slot goes, making it
useless for folks like me with so many different makes and models of
Pertec formatted drives!)
And I would like to *personally* thank each and every individual who
specified key-less ambiguous connectors for thier design. Too bad
you can't be made to compensate for lost time/headaches/fireworks.
One other issue... check the round cable for bent
pins.
6:41 a.m.
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