Re: Trouble with new poweredge 2950 - solved

When I disabled hyperthreading (labelled "logical processors" in BIOS),
the system started booting. Strange that HT would cause the system to
hang at boot. The correct number of processors shows and the amount of
CPU time being used is properly represented.

Jerry

I just got a PE 2950 and I'm having some problems.

I installed 6.2PRE and it went well. The first thing I noticed is that
immediate as BSD start to load, a bold/highlighted message says "768xxx
bytes above 4G ignore" or something like that (don't recall what xxx was.

Next thing I noticed whilest trying a buildworld against the latest stable
sources. My system detects 8 cpus. It actually only has 4 - 2 dual core
xeons. I'm guessing that the others are from hyperthreading, but I'm not
certain. Hyperthreading is disabled by default, I believe. So, in the
process of make buildworld -j 32, I noticed that only even numbered CPUs
are being used (0,2,4,6). Is that because BSD is ignoring the HT CPUs,
which would be 1,3,5,7? top and iostat both show that I was never able to
exceed 50% overall CPU usage. Is that because even though I have the HT
representations disabled, the OS is using their availabilty in calculating
% idle time? Is there any way to get an accurate number? The PE doesn't
let me disable HT, I don't believe.

Finally, after the upgrade, I'm having a problem with the system hanging
on startup right after the firewall message, and sometimes right after the
CD ROM detection message. I believe that the SAS controller is supposed
to be detected next, and I'm assuming that's the problem. When I first
tried to install, I used 6.1, and it completely didn't recognize my SAS
controller. I found a message in the archives that suggested trying the
latest stable source, so I tried 6.2 and it worked. Any ideas what could
be causing the problem? When I was using the 6.2PRE ISO, I had to restart
a few times before it got past that stage also.

Thanks much!

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