Vista - Data corruption while using shared folders

09-23-2008

I look through this discussion and did not find such question (but find
question, that arise because this problem: MDB corruption).
So, anybody expirience this?
For now I found, that this it's not important, what guest and host os, but
is important what processor host OS using. On my notebook Centrino Duo - with
2 cores - installed. On my test machine - TX300 server - one Xeon CPU
installed (with HyperThreading support). Also I test it on some other
desctops and notebooks. I found, that problem persists on some system with
more than one processor (I can test only up to two) and on systems with
HyperThreading enabled - when HD disabled and one CPU - no problem.
Now guest os running with latest VM additions (for vpc 2007 sp1): 13.820
with this version I can see only file data corruption. Earlier I expirience
more generic errors - e.g. explorer or cmd.exe crush while directory
exploring (listing).

For illustration of data corruption I use simple test sequence: calculate
MD5 for a large file (e.g. film 700MB) on host os, and then a few times on
guest OS. On guest os on affected hardware the hashes is different every time:
hash on host os:
6facaf561ff4bcd7aa1440989cef519c *CD1.avi
hash on guest os:
706b35db57ab3ab9412fae7d594fab42 *CD1.avi
and more:
abf97dc1d02054ef6721418ac1fd6324 *CD1.avi

Please, don't post replies like "use network, use SMB etc." - it's complex
and unjustified setting up network on, e.g. FreeDOS booted from recovery CD!

Maybe, anybody knows, is it possible to solve this? how to tell this to
developers? I'm ready to be tester for this situation - my notebook ready for
you!

Thanks

09-25-2008

"hex_messer" <hexmesser@xxxxxx> wrote in message
news:8138AF54-B9CE-411F-BD96-5E22B5897441@xxxxxx

Quote:

> For illustration of data corruption I use simple test sequence: calculate
> MD5 for a large file (e.g. film 700MB) on host os, and then a few times on
> guest OS. On guest os on affected hardware the hashes is different every
> time:
> hash on host os:
> 6facaf561ff4bcd7aa1440989cef519c *CD1.avi
> hash on guest os:
> 706b35db57ab3ab9412fae7d594fab42 *CD1.avi
> and more:
> abf97dc1d02054ef6721418ac1fd6324 *CD1.avi
>
> Please, don't post replies like "use network, use SMB etc." - it's complex
> and unjustified setting up network on, e.g. FreeDOS booted from recovery
> CD!

The answer is to use regular networking. Forget "shared folders". It is
NOT "complex and unjustified". The biggest problem is that you can not
copy a file larger than 4 GB using "shared folders". I found this bug the
hard way. You HAVE to use regular networking if you want reliable access.

09-23-2008	#1 (permalink)
hex_messer n/a posts	Data corruption while using shared folders I look through this discussion and did not find such question (but find question, that arise because this problem: MDB corruption). So, anybody expirience this? For now I found, that this it's not important, what guest and host os, but is important what processor host OS using. On my notebook Centrino Duo - with 2 cores - installed. On my test machine - TX300 server - one Xeon CPU installed (with HyperThreading support). Also I test it on some other desctops and notebooks. I found, that problem persists on some system with more than one processor (I can test only up to two) and on systems with HyperThreading enabled - when HD disabled and one CPU - no problem. Now guest os running with latest VM additions (for vpc 2007 sp1): 13.820 with this version I can see only file data corruption. Earlier I expirience more generic errors - e.g. explorer or cmd.exe crush while directory exploring (listing). For illustration of data corruption I use simple test sequence: calculate MD5 for a large file (e.g. film 700MB) on host os, and then a few times on guest OS. On guest os on affected hardware the hashes is different every time: hash on host os: 6facaf561ff4bcd7aa1440989cef519c CD1.avi hash on guest os: 706b35db57ab3ab9412fae7d594fab42 CD1.avi and more: abf97dc1d02054ef6721418ac1fd6324 *CD1.avi Please, don't post replies like "use network, use SMB etc." - it's complex and unjustified setting up network on, e.g. FreeDOS booted from recovery CD! Maybe, anybody knows, is it possible to solve this? how to tell this to developers? I'm ready to be tester for this situation - my notebook ready for you! Thanks
My System Specs

09-25-2008	#2 (permalink)
Bob Campbell n/a posts	Re: Data corruption while using shared folders "hex_messer" <hexmesser@xxxxxx> wrote in message news:8138AF54-B9CE-411F-BD96-5E22B5897441@xxxxxx Quote: > For illustration of data corruption I use simple test sequence: calculate > MD5 for a large file (e.g. film 700MB) on host os, and then a few times on > guest OS. On guest os on affected hardware the hashes is different every > time: > hash on host os: > 6facaf561ff4bcd7aa1440989cef519c CD1.avi > hash on guest os: > 706b35db57ab3ab9412fae7d594fab42 CD1.avi > and more: > abf97dc1d02054ef6721418ac1fd6324 *CD1.avi > > Please, don't post replies like "use network, use SMB etc." - it's complex > and unjustified setting up network on, e.g. FreeDOS booted from recovery > CD! The answer is to use regular networking. Forget "shared folders". It is NOT "complex and unjustified". The biggest problem is that you can not copy a file larger than 4 GB using "shared folders". I found this bug the hard way. You HAVE to use regular networking if you want reliable access.
My System Specs

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