Dual Athlon MP 1U units - rack save

[alvin at Maggie.Linux-Consulting.com]

hi all

i like these discussions/feedbacks of 1U chassis issues.. :-)

i've heard of problems woth the appro dual-amd chasiss tooo
and yes... its not trivial to solve
	- notice they have tons of air flow too with them
	large 4" blowers..

i'd be curious to see/update status of the racksaver 
1U tests...

airflow outside the case might not help... since the CPU
might not have access to the outside air flow, when its
butting up against the hot power supply
	- its better to expose the cpu to the outside 
	by leave it close to the chassis edge rather
	than up against the power supply

	- when the cpu is breathing air from the otuside
	than the ambient temperature does help in cooling
	the cpu core too

also with one side fan on the cpu for cooling, if that fan dies...
that cpu will get too hot especially when the cpu is covered
with those plastic air-flow housing

we've just gotten our protootype P4/AMD 1U-capable chassis
and ready for some heat/airflow/power supply testing
	- fun stuff ??

one of my simple 1U tests - is an infinite kernel compile
and simulataneously creating 2GB-sized files  and also exercising
the disks with  "tree /" and see how hot it gets ...
if it passes the onboard cpu temp tests... than we're happy


thanx
alvin
http://www.Linux-1U.net ... P4 and AMD - based 1Us...


On Fri, 25 Jan 2002, R C wrote:

> On Fri, Jan 25, 2002 at 11:54:37AM -0600, Steven Timm wrote:
> > 
> > I am just wondering how many people have managed to get a
> > cluster of dual Athlon-MP nodes up and running.  If so,
> > which motherboards and chipsets are you using, and has anyone
> > safely done this in a 1U form factor?
> 
> We're in the process of testing our 1U dual athalon nodes from Racksaver.
> 
> Configuration:
> 16 nodes
> Dual Athalon 1.53 (1800+)
> 512 MB PC2100 Reg/ECC (Crucial / Corsair) (We ordered Crucial ram modules 
> before the price hike)
> 20 GB IDE HDs (IBM)
> S2462NG (non-scsi version)
> 
> The units themselves are solid, and hefty (roughly 30 lbs). They do draw
> quite a bit of power (we are waiting for a 2nd 30 amp drop).  No
> problems with them so far (24 hour burnin, room temperature approx 75-80
> deg F, above recommended temperature).  They are noisy, as one would
> expect from 1U units with these processors.  Don't put them in an office. 
> CPU temperatures after 24 hour runs were in the 49-55 C range.
> 
> We haven't gotten our software on all the units yet, but they seem
> stable.  Once our school actually cut the PO, the order went through 
> quickly.
> 
> Robert Cicconetti
> 
> PS. Has anyone gotten Wake-on-Lan working on this motherboard?