[Discuss] memtest86+ oddities

[Bill Bogstad]

On Thu, Dec 27, 2012 at 9:50 PM, Tom Metro <tmetro+blu at gmail.com> wrote:
>...  It was looking like the motherboard had a fault, but I happened to try
> an Ubuntu 12.04 CD I had handy. Magically that fixed it. It ran
> overnight testing the original 2 modules without error.
>
> Both CDs uses the same version of memtest86+, 4.20.
>
> I wonder what the difference is? Corrupt CD? (Both are official, mass
> produced Canonical CDs.)

Sounds possible.   You could try doing a checksum (md5sum perhaps?) of
the memtest86 binary from both CDs to see if they differ.  If might
also be interesting to boot both CDs and run the CD integrity check
that is typically available on Ubuntu CDs:

https://help.ubuntu.com/community/Installation/CDIntegrityCheck

and see if it complains.   Manufacturing errors certainly can happen.

Bill Bogstad