Date: Mon, 14 Jun 2004 11:23:53 -0700 From: Derrick MacPherson <dmacpherson@mainframe.ca> To: Charles Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD 4-10 install, RAM parity errors that don't seem to happen inLinux. Message-ID: <1087237433.17427.133.camel@Mandarin> In-Reply-To: <6C183DA4-BE2F-11D8-BD27-003065ABFD92@mac.com> References: <1086992110.17427.117.camel@Mandarin> <loom.20040614T193645-364@post.gmane.org> <6C183DA4-BE2F-11D8-BD27-003065ABFD92@mac.com>
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On Mon, 2004-06-14 at 11:19, Charles Swiger wrote: > On Jun 14, 2004, at 1:38 PM, Derrick MacPherson wrote: > > Derrick MacPherson <dmacpherson <at> mainframe.ca> writes: > >> I am trying to move as much of our servers as I can to FreeBSD, and > >> there's a few boxes that they have here that the RAM is a about 2 mm > >> high and requires the case (1U machines) to press on the RAM when > >> closed. These machines run RH Linux for months without a problem, yet > >> 3 > >> out of 4 I just pulled are giving RAM parity problems during FreeBSD > >> instalation. > >> > >> Does FreeBSD not allow/recover from those types of errors the same way > >> Linux does? Any solutions? > > > > I posted this last week and hadn't seen a repsonse to it, is there > > someone that > > cares to take a poke at this? > > Well, if you are using ECC, normally they will correct all single-bit > errors and notice but not correct larger multibit errors. This is done > at a fairly low level in the hardware (which is why the BIOS typically > controls the use of ECC), and is not something that is supposed to vary > depending on which OS you are using. > > That being said, Linux and FreeBSD might be using different portions of > memory which hit different RAM chips, and so you see the errors for one > and not the other, but if you've got failing RAM, your systems are not > going to be stable under heavy load regardless of what OS you use. I > would expect you to see signs of problems under Linux, too, but > consider running memtest86 for a day or so and see what you see: > > http://www.memtest86.com/ Thanks Chuck I will look into running those tests. The machines have had heavy loads for a couple years now, they have served as rendering machines for our animators. They are now being put to pasture, and I was hoping to run FreeBSD, :), and not Linux, :(
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