Corrupted MAC on input. Disconnecting: Packet corrupt

[Mehmet Erol Sanliturk]

On Tue, Jan 11, 2011 at 9:11 AM, Julien Cigar <jcigar at ulb.ac.be> wrote:

> On 01/11/2011 10:43, Julien Cigar wrote:
>
>> Hello,
>>
>> I'm facing a very strange problem on a machine: When I unzip a file (I'm
>> 100% sure the file is not corrupted) and I get the following:
>>
>> jcigar at frodon ~ % ssh 10.0.0.225
>> Password:
>> jcigar at dev ~ % unzip elgg-1.7.6.zip
>> Archive: elgg-1.7.6.zip
>> creating: elgg-1.7.6/
>> creating: elgg-1.7.6/engine/
>> inflating: elgg-1.7.6/engine/settings.example.php
>> creating: elgg-1.7.6/engine/handlers/
>> creating:
>> elgg-1.7.6/mod/tinymce/tinymce/jscripts/tiny_mce/plugins/emotions/langs/
>> inflating:
>>
>> elgg-1.7.6/mod/tinymce/tinymce/jscripts/tiny_mce/plugins/emotions/langs/en_dlg.js
>>
>> inflating:
>>
>> elgg-1.7.6/mod/tinymce/tinymce/jscripts/tiny_mce/plugins/emotions/editor_plugin.js
>>
>> inflating:
>>
>> elgg-1.7.6/mod/tinymce/tinymce/jscripts/tiny_mce/plugins/emotions/emotions.htm
>>
>> Corrupted MAC on input.
>> Disconnecting: Packet corrupt
>> jcigar at frodon ~ %
>>
>> The system is running 8.2-RC1 (amd64). I had the same problem under
>> 8.1-RELEASE (I thought it was a bug in the Ethernet driver, so I
>> upgraded to 8.2-RC1)
>>
>> The card is:
>> age0 at pci0:2:0:0: class=0x020000 card=0x82261043 chip=0x10481969 rev=0xb0
>> hdr=0x00
>> vendor = 'Attansic (Now owned by Atheros)'
>> device = 'Gigabit Ethernet 10/100/1000 Base-T Controller (Atheros L1)'
>> class = network
>> subclass = ethernet
>>
>> Any idea what could be the problem ?
>>
>> Thanks,
>> Julien
>>
>
> OK, I dug a bit and found the problem ...
>
> I have 4 memory slots on the motherboard : D C  B A
> When I put a memory stick in A _or_ C it works
> When I put memory sticks in A _and_ C it works too
> However, when I put memory sticks in A _and_ B or A _and_ B _and_ C it
> fails ... (dual channel)
>
> Could it be a bug... or a broken Bios ?
>
>
>>
>>

In main boards , memory channels mainly are colored pair-wise , for example
Red-Blue , Red-Blue . One of the colors is Zero channel , the other 1
channel .
For Intel 1366 pin sockets , there are 3 pairs : for example , Red-Blue ,
Red-Blue , Red-Blue .

When memory chips are installed , first zero channels should be filled ,
then one channels , as in increasing order . Placing memory chips
arbitrarily will get a non-working main board , which is NOT a bug , but
production principle .
Another principle is when more than one chip is installed , they should be
the SAME in pair-wise , for example Red channels having the same size , Blue
channels having the same size as Mega or Giga bytes , and they should have
same Mega-Hertz speed .

The more complete and correct information may be obtained from your main
board manual . Another point is ´Supported memory´ chips list . When you
want to use memory chips , it is necessary to study main board supported
chips list and select among them .

It seems that your memory chips are correctly selected , but please insert
them as instructed by the main board manual . In other combinations ,
working is accidental and I do not know there may be other problems
associated incorrect placement .

Personally I never insert chips in a way other than defined in manual .

Some main boards may check correctness of insertions and it my give failure
indicator beeps , but some main boards may not check , but will not work as
you expected : Everything is working as single ones , but they are not
working in combination .

Thank you very much .


Mehmet Erol Sanliturk