Exclude bad ram bytes

Question

I have 5 bytes (or bits, don't know) of bad Ram. How can I exclude these bytes so my Ubuntu 11.10 don't use them. My PC randomly freez, and when I ran memtest it reported 5 errors.

Zuul · Accepted Answer · 2012-06-16T20:15:51.660

4

The only solution that I know of is BadMem (by Rick van Rein), who is able to block bad memory sectors in Linux.

It works by instructing the kernel to lock those memory addresses you specified. This effectively stops Linux from ever addressing those addresses when allocating (and deallocating) memory.

You can read all about at the BadMEM-HOWTO page!

Possible auxiliary documentation can be found at:

BadRAM - Community Ubuntu Documentation.

Linux Journal - Running Linux with Broken Memory By Rick van Rein

edited Jun 16 '12 at 20:15

answered Jun 16 '12 at 18:52

Zuul

1,974

Wow, I didn't even know this was possible. – RobinJ Jun 16 '12 at 18:57
1

@RobinJ, found it some time ago, when dealing with this problem on an old computer, where memory modules are very pricey :) – Zuul Jun 16 '12 at 19:08
How to install it. Documentation is not complete – Alen Jun 16 '12 at 19:12
@Alen, you can check BadRAM - Community Ubuntu Documentation for more instructions. – Zuul Jun 16 '12 at 19:15
I excluded bad adresses using instructions on link that @Zuul provided. and I will report you tomorrow if it is successuful – Alen Jun 16 '12 at 20:07
this is what I get: http://imageshack.us/photo/my-images/685/p3067632.jpg – Alen Jun 17 '12 at 11:40
http://imageshack.us/photo/my-images/62/p3067631.jpg
can you tell me how to exclude this in GRUB. I tried using BADRAM option in memtest but no luck
– Alen Jun 17 '12 at 11:41
@Alen, have you read the links that I've posted? You need to patch the kernel with BadRAM, it has nothing to do with GRUB or memtest! You seem to have misunderstood the BadRAM usage. – Zuul Jun 17 '12 at 11:51

Exclude bad ram bytes

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