21 Mar
2002
21 Mar
'02
7:08 p.m.
On Fri, 22 Mar 2002, Gunther Schadow wrote:
Whatever. Who can tell me where this power sequencing
jumper
is so that I can set it to being the first to spin up?
You have two small round connectors on the back of the drive. Those are
the power sequence in and out. You usually hooked all (or groups) of RA81
together with the power sequence cables, and the drives started in
sequence. About 10 seconds between each drive. The first drive have a
special plug in the in-socket.
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
22 Mar
22 Mar
12:52 a.m.
Johnny Billquist wrote:
You have two small round connectors on the back of the
drive. Those are
the power sequence in and out. You usually hooked all (or groups) of RA81
together with the power sequence cables, and the drives started in
sequence. About 10 seconds between each drive. The first drive have a
special plug in the in-socket.
Ahhrgh! Well, thanks for letting me know. I knew about the power
sequencing chain and the cables and stuff, but where the heck should
one get those jumpers from? I was hoping there was some jumper of
dip-switch on the inside that would let me override this. May be
I should cut one of the cable that I do have and just cut the two
wires short? Would that make a functional jumper? Or has anyone
gotten a box of those and could give me one?
thanks,
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
3:22 a.m.
On Fri, 22 Mar 2002, Gunther Schadow wrote:
Ahhrgh! Well, thanks for letting me know. I knew about
the power
sequencing chain and the cables and stuff, but where the heck should
one get those jumpers from? I was hoping there was some jumper of
dip-switch on the inside that would let me override this. May be
I should cut one of the cable that I do have and just cut the two
wires short? Would that make a functional jumper? Or has anyone
gotten a box of those and could give me one?
I haven't really looked inside one of those, so I have no idea how it
looks like, but I cannot imagine it being any more complicated than just
shorting two pins...
I might have one or two somewhere, if I look hard enough. But I'm in
Sweden, so you'd probably prefer to get them from someone closer...
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
23 Mar
23 Mar
4:01 p.m.
Gunther Schadow <gunther(a)aurora.regenstrief.org> wrote:
Johnny Billquist wrote:
Ahhrgh! Well, thanks for letting me know. I knew about
the power
sequencing chain and the cables and stuff, but where the heck should
one get those jumpers from? I was hoping there was some jumper of
dip-switch on the inside that would let me override this. May be
I should cut one of the cable that I do have and just cut the two
wires short?
My RA81 stopped working a while ago... Reading this I wondered if I had
the sequencing jumper in wrong (until now I didn't know what they did). It
turns out that mine wasn't plugged all the way in. Now I can try and get it
recognised by NetBSD :-)
Anyway, the "start jumper" just shorts two of the 4 pins together, so I
imagine you could do something with a bit of wire in the socket.
- one notch on it's own
.
. .
| . | two notches close together
\ /
The dots represent the pins, the lines represent notches cut into the inside
diamater of the plug body, corresponding to ridges on the plastic inner
part of the socket on the drive.
On my drive the socket has the single notch on it's own at the top and the
plug joins the pin at 9pm to the one at 6pm as viewed looking into the socket
from behind the drive.
--
Tom Parker - tom(a)carrott.org
- http://www.carrott.org
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