[rescue] Old sparcstations & overheating

Sandwich Maker adh at an.bradford.ma.us
Tue Feb 22 18:05:45 CST 2005

this is all very apropos for me, since i've just scored a sparcengine
ultra 20.

for those of you who don't know, it was made by sun microelectronics
for the industrial mkt, to replace the sparcengine 5 and 20  cpu
boards in embedded apps.  it appears to be essentially a u1e chipset
on an aurora-size board - but with a u2-style socketed cpu; mine's 300
MHz.  otoh uname -i says it's an ultra-2, but iirc a couple of years
ago someone [on this list?] tried to flash his seu20 obp with a u2
update and turned it into a doorstop...

fas scsi, hme ethernet...  no upa slot though, but i have a tx4.

i put mine into a ss4 case [yes with the 'server', aka ss5/20, ps],
with 8 32M sticks and two 39103 drives.  these spec ~7.6w idle, less
than the ~8.8w of the 34371s below.  took s8 2/02 off the cd just

" From: "Janet L. Campbell" <janet at foonly.com>
" On Thu, 17 Feb 2005, John Redmond wrote:
" > I am (still) planning to put a couple of old sparcs in a
" > co-lo. One would be ss10 with dual sm81s the other ss20 with dual HS
" > 133s. Both would have 2 smallish seagate 4.2 gig drives ST34371W in the
" > SS20, not sure yet about the SS10. Is it just the bigger, newer drives
" > that pose the overheating problems?
" Since the drives and the mainboard are located in different air paths in
" the SS20, hot drives are unlikely to kill the processors.  However, with
" hot drives, the failure rate of the upper drive seems to be noticably
" higher.  Make sure you have the hard drive fan FCO installed (looks like a
" mini fan between the CDROM/floppy and hard drive bays).

i recall that fco...  where would one find one these days?

another weakness with the upper drive is that the sca paddleboard
doesn't have a slot in the middle so that air can flow between the
drives and out the side.

" Removing the side panels is easy and gives you a little extra airflow, 
" late-model SS20s (and SS4/SS5s) had side panels with a more open flow 
" design.  I seem to remember them being mandated with certain high-heat 
" cards, like the TZX.

was this the chassis that took a normal-size cdrom?
i'd like to get one of those hd fans, late-model chassis [i have a 12x
cdrom to put in it], and a type-4 kbd.  i used a very wonky type-4 to
do the install, but the shift keys don't work...  what was the
resolution of the recent cleaning thread?  not dishwasher safe,

i'm also looking for a sparc-5 cdda cd-motherboard digital audio cable.
this thing has the header for it just like a ss5, same place even,
though the docs say -unsupported-...

for the future, i want a faster cpu.  400 was never offered but is
known to work; my question is whether it can handle the heat of a
400/4M [~70w] or should i stick to a 400/2M [~59w, same as the 300]?
anyone know a place that'll do -really-small- pcb runs?  i might have
a go at that sca paddleboard, and give it wide scsi into the bargain.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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