carlopmart wrote:
> carlopmart wrote:
>> Luke S Crawford wrote:
>>> carlopmart <carlopmart@(protected):
>>>>>> When I try to copy a 465MB's or 650MB's file to domU, md5sum is
>>>>>> ok. But when I try to copy a 1GB file or more, md5sums are
>>>>>> wrong. Same result if I try to copy from domU. for example:
>>> ...
>>>> Please any hints?? I need to deploy this system on a production
>>>> environment with xen or with vmware server ...
>>>
>>> I can't reproduce the problem; several things to check:
>>>
>>> 1. ram. your problem could be caused by funky ram. run memtest86.
>>>
>>> 2. funky swap. run dmesg in the dom0. do you see funky problems
>>> related
>>> to disk? run smartctl and see if your disks are dying.
>>>
>>> Of course both of those things should also cause periodic swaps, but
>>> especially
>>> if you don't use ECC ram, and you normally use less ram than you are
>>> using
>>> with virtualization, setting up virtualization could cause to to use
>>> funky ram
>>> that would otherwise be idle. another thing to look at is dmesg in
>>> the DomU and see if there are any interesting messages.
>>> Also, The md5sum is wrong,but is the file size about right?
>>>
>>>
>>
>> Thanks Luke for your responses. My answers:
>>
>> 1) memtest86 doesn't reports any error with ram.
>> 2) when I try to start smartd i see these errors:
>>
>> SCSI device sda: drive cache: write back
>> ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
>> ata1.00: cmd b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 0
>>       res 51/04:00:80:00:00/00:00:00:00:00/00 Emask 0x1 (device error)
>> ata1.00: Host Protected Area detected:
>>      current size: 312579695 sectors
>>      native size: 312581808 sectors
>> ata1.00: Host Protected Area detected:
>>      current size: 312579695 sectors
>>      native size: 312581808 sectors
>> ata1.00: configured for UDMA/133
>> ata1: EH complete
>>
>> 3) file size are ok, only md5sums are wrong. But If I try to execute,
>> decompress, mount or I will try another operation to any file, all
>> fails ...
>>
>> I have attached dmesg from dom0 and domU
>>
>
> Ok, it seems the problem isn't hardware related, I am not 100% sure but
> it seems. I have installed vmware server beta2 on this rhel5.1 host.
> Afterwards I have setup a rhel5.1 guest (without installing vmware
> tools) and all md5sums are ok now (on guest and on host).
>
> Any ideas why under vmware all works ok (an it is a beta product) and on
> rhel5.1 xen not???
>
>
>
>
Please, can somebody helps me??

--
CL Martinez
carlopmart {at} gmail {d0t} com

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