Gentoo Archives: gentoo-dev

From: Kevin <gentoo-dev@××××××.biz>
To: Gentoo Dev <gentoo-dev@l.g.o>
Subject: [gentoo-dev] memtest86 fails? (was Re: [gentoo-dev] Major MCE problem with SMP on Gentoo kernels)
Date: Wed, 12 May 2004 16:22:45
Message-Id: 200405121222.15491.gentoo-dev@gnosys.biz
1 Thank you Chris, Bret, and Heiko for your replies, both on- and off-list.
2
3 Your replies all look like good suggestions and I'm going to try them, but
4 first, I have to ask one other thing.
5
6 As I said earlier in this thread, I found zero errors in an 8 hour
7 exhaustive memory test (using the Dell-provided Utility Partition tests)
8 running 15-16 loops, 4 different tests, and found zero errors from a
9 complete hardware test (also from the Utility Partition).
10
11 But just on a lark, I decided to try memtest86 3.0 and 3.1a as well, and
12 both are turning up errors all over the place. I'm skeptical that
13 memtest86 is giving me accurate information because (a) it's finding so
14 many, (b) I can't seem to get it to turn on ECC mode (yet the Dell
15 utilities did test this, and the CMOS reports that it is ECC memory), (c)
16 it runs for only 10 seconds or so and begins finding errors, and (d) it
17 locks up after about 2-5 minutes. Last time I ran it, the error count
18 was up to 109 after 5 minutes and then it locked up.
19
20 Any thoughts on this?
21
22 Is this bad memory (in spite of the Dell tests all turning up flawless) or
23 is memtest86 getting something wrong (like amount of installed memory to
24 test)? Any way to tell for sure? I've looked at the docs for memtest86
25 and they talk about the possibility of memtest86 incorrectly determining
26 the amount of memory to test and that seems likely in my case. The first
27 10 or so errors are all at the same address (0003fffdc80) 1023.8MB, then
28 there are 4 or so at 64.0MB, then 1 or 2 at 0.6MB, then it locks up.
29
30 The Dell utilities report testing only up to 1022MB of memory.
31
32 Is this a case of memtest86 getting the installed memory count wrong?
33 When I look at the CMOS/BIOS settings, the System memory is 1024MB, and
34 that's what the Dell utilities also report initially, but the tests
35 themselves are only being run on the first 1022MB, according to the test
36 reports.
37
38 Thanks.
39
40 -Kevin
41
42 --
43 gentoo-dev@g.o mailing list

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