From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <13426df11002181031g5ce06000vab68f13461880eef@mail.gmail.com> References: <769b58f43b908586ca581d2bfd2fcccd@ladd.quanstro.net> <4B7D8650.6030409@maht0x0r.net> <13426df11002181031g5ce06000vab68f13461880eef@mail.gmail.com> Date: Thu, 18 Feb 2010 12:04:45 -0800 Message-ID: <3e1162e61002181204w3b3c5aacuc4225d2963fb1b88@mail.gmail.com> From: David Leimbach To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=000e0cd573d271c3f2047fe57a01 Subject: Re: [9fans] pineview atom Topicbox-Message-UUID: d6ac939c-ead5-11e9-9d60-3106f5b1d025 --000e0cd573d271c3f2047fe57a01 Content-Type: text/plain; charset=ISO-8859-1 On Thu, Feb 18, 2010 at 10:31 AM, ron minnich wrote: > On Thu, Feb 18, 2010 at 10:26 AM, matt wrote: > > > > > >> it supports 4gb of memory. > > > > of non-ECC memory, so nice terminal, bad server > > > > > > "the probability of having at least one bit error in 4 gigabyes of memory > at > > sea level on planet Earth in 72 hours is over 95%." > > > humorous and true story. The Big Mac system at Virginia Tech could > tell you if it was day or night. There was a dramatic increase in > memory error rates during the day. I saw a very nice graph showing the > effect. > > Seems the earth is a pretty good shield for nasty high energy > particles from our local light source :-) > > So just run it as a server at night and you may be fine! > > ron > I had a little interaction with that setup myself. Didn't they move to Xserves ultimately so they could have ECC RAM? I think it was all PowerMac G5s to start. I know of a larger cluster of Xserves too that was in Huntsville AL that I physically visited and worked with that was all Xserves (2500 of them I believe at the time). --000e0cd573d271c3f2047fe57a01 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Thu, Feb 18, 2010 at 10:31 AM, ron mi= nnich <rminnich@= gmail.com> wrote:
On Thu, Feb 18, 2010 at 10:26 AM, matt <maht-9fans@maht0x0r.net> wrote:
>
>
>> =A0it supports 4gb of memory.
>
> of non-ECC memory, so nice terminal, bad server
>
>
> "the probability of having at least one bit error in 4 gigabyes o= f memory at
> sea level on planet Earth in 72 hours is over 95%."


humorous and true story. The Big Mac system at Virginia Tech could tell you if it was day or night. There was a dramatic increase in
memory error rates during the day. I saw a very nice graph showing the
effect.

Seems the earth is a pretty good shield for nasty high energy
particles from our local light source :-)

So just run it as a server at night and you may be fine!

ron

I had a little interaction w= ith that setup myself. =A0Didn't they move to Xserves ultimately so the= y could have ECC RAM? =A0I think it was all PowerMac G5s to start.

I know of a larger cluster of Xserves too that was in Huntsv= ille AL that I physically visited and worked with that was all Xserves (250= 0 of them I believe at the time).

--000e0cd573d271c3f2047fe57a01--