[SunRescue] SPARC mp3 player revisited...

[Mike Hebel]

Ummm...unless you manually forwarded this to the list I don't think it got
there.

As for trimming the plugs I'm going to see about that (I have a Dremel :-).
I may be able to seal the plug end with the plastic potting compound that we
have at work.

Since I work for an aerospace manufacturing company I think I may avoid the
whole case issue by designing a "rack" style case to fit the LX components.
(It's nice having sheet-metal people in-house. ;-)  Since this is hopefully
going in the car I might even be able to do away with the power supply if I
can find a good explanation of how the "power OK" signal works.  Then I can
probably just make up a DC - DC converter with regulated voltage circuits
for the +5 and +-12.  But that's further down the road. (2.0 version) *grin*

Neither of my drives is differential but I don't see that as much of a
problem.  I think that as long as my log files aren't filling up with errors
I'll just sit back and wait to see if it's even an issue.

Thanks for the help!

Sincerely,

Mike Hebel

-----Original Message-----
From: root at glitch.crosswinds.net [mailto:root at glitch.crosswinds.net]On
Behalf Of Tim Brown
Sent: Friday, November 10, 2000 11:41 AM
To: drone8of9 at crosswinds.net
Subject: Re: [SunRescue] SPARC mp3 player revisited...


Mike Hebel wrote:

> I'll try it when I get home tonight but I don't see how it'll close.  The
> Barracuda is pretty big and the plug is in _just_ the wrong place.
>
> To be honest I didn't even really try it.
>
> Question - did you have to terminate the internal bus with two drives
> plugged in?  I didn't and it seems to work fine but since you've done the
> same setup I thought I'd ask.

Well its funny you should ask that :) Because I'm running 2 SCSI busses
inside
my LX :) the SCSI 2 Bus and an a Wide Differential Bus My Drive 1 gig I'm
running is an IBM the drive has termination built on board so that bus is
terminated and the 9.1 gig Baricuda Differential bus is not terminated I
went
around Toronto for a whole saturday and was unable to find a Wide internal
Differential SCSI terminator. So I run that bus unterminated and it seem to
be
fine no SCSI timeout or SCSI errors. I think as long as the cable is kept
short it seems to be fine. The differential controller I had to get
'creative'
as one would say because the scsi connector is on the outside of the case
with
a 10baseT ethernet I basically plugged on the cable pulled it into a tight
loop and ran it right back through the same SBUS hole it was tight but it
worked... :)  BTW now that I think about one one of the systems either my
IPX
or my LX can't remember I did an ever so SLIGHT trim job on the power
connector closest to the lip of the case. Utility knives and Dremels(tm) are
the KEY to every good computer technicians tool box. Unfortunatley I don't
have a Dremel(tm) I always have to borrow one but my brother and I have
decided to give each other Dremels(tm) for xmas :) Nothing say brotherly
love
like power tools :)

Hope that helps Mike if not sorry for making you even more confused :)

Actually while I'm writing does anyone know the maximum lenth for a SCSI 2
bus
I do have one box giving me some SCSI timeouts on start up once it reduces
sync transfer rate the drive is fine  I guesstimate on the lenth of the bus
is
probably 10-11feet (6 foot external SCSI 2 Cable) to a large SCSI Chassis
(About another 4 or 5 feet of scsi bus. the drive thats timing out is on the
very end of the chain and is the terminating device should I be moving this
to
else where in the chassis and making something else a terminating device?

This is no big deal but I never like seeing errors especially when they
involve my scsi bus :)