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Kim Stacks
Asked: 2013-08-19 17:22:32 +0800 CST

typed `apt-get update` now showing a long list of EDAC errors. Is there anything wrong?

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I typed apt-get update and then I saw a long list of

EDAC i7Core: Lost 127 memory errors

Please help me understand what has happened.

I am using ubuntu server edition 12.04 LTS

UPDATE:

I followed Gilles answer. I got the following when I do a dmesg

[113893.215234] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215237] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215240] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215243] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215246] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215248] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
[113893.215251] EDAC MC0: CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 page:0x0 offset:0x0 grain:8 syndrome:0x0)
hardware

1 Answers

  1. Best Answer

    EDAC is the kernel component that watches for memory errors. You get a message about lost memory errors when so many errors occurred in a short interval that the kernel was unable to log them all.

    A memory error is a bad thing. Check your kernel logs (/var/log/kern.log) for messages like this:

    EDAC MC0: CE page 0x283, offset 0xce0, grain 8, syndrome 0x6ec3, row 0, channel 1 "DIMM_B1": amd76x_edac

    CE indicates an error that was corrected. If your RAM has error correction, it's ok to have a corrected error now and then. But when you get to the point where memory errors get lost due to their number, it's high time to replace your RAM. The message indicates which RAM module (DIMM) is faulty.

    If you see UE instead of CE, it means that an error was detected but not corrected. You may have corrupt data.

    If your RAM and CPU don't support error correction, then the first sign you'll get that your RAM is defective is when you realize that your data is corrupted.

    This is completely unrelated to apt-get update, that's just the command you happened to be executing when the errors happened.

    Replace your RAM yesterday.

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