Re: Data corruption when transfering across network?

In article <gn4fg1lftiejfh7l965ndvdfiosjfdhdvg@xxxxxxx>,
cquirkenews@xxxxxxxxxxxxxxx, cquirke (MVP Windows shell/user) says...

> On Sat, 20 Aug 2005 09:48:05 -0400, ByTor <ByTor@xxxxxxxxxxx> wrote:
> >cquirkenews@xxxxxxxxxxxxxxx, cquirke (MVP Windows shell/user) says...
> >> On Thu, 18 Aug 2005 10:10:15 -0400, ByTor wrote:
>
> >> >I have 6 computers networked in my home, no domain just plain ole'
> >> >sharing basically..........
>
> >> >I'm using a 4-port router uplinked to a 8-port workstation.......
>
> >> >Bottom line, no matter if they are connected to either devices one
> >> >particular machine recieves tranfered data corrupted......It appears to
> >> >only happen with larger files.......I've yet to actually isolate at what
> >> >size the file is when it corrupts but I can say this, I transfer 350mb
> >> >ea. avi files and all are corrupted on the recieving end, maybe a few
> >> >blocks short to repair. Smaller files appear to be no problem.........A
> >> >few smaller exe installs though were corrupted a few times but were
> >> >easily repaired from the original.
>
> >> I'd be thinking in terms of Ethernet rules, such as maximum cable
> >> lengths or number of connections between systems, etc. A too-long
> >> (either length, or hops) linkage might cause propagation delays to the
> >> point that Ethernet collision detection may fail - i.e. the test for
> >> this sees no collision, data transmit begins, but meantine something
> >> else "too far away" has also started transmission.
>
> >Strange how my other 3 OS's on the same machine recieve data
> >perfectly...Thank you for taking the time to suggest an issue, I will
> >furthur research what you are pointing out......Thank You.
>
> If the same hardware gives different results with different OSs, then
> one of a few issues suggest themselves...
> - flaky drivers for that particular OS
> - hardware is "driven harder" within that particular OS
> - that particular OS is infected
> - the loading differs with the test (e.g. testing with fewer PCs)

As far as this particular Win2K install, yes, it is definately driven
harder than the remaining 3 OS's........More installs, etc.
I have 4 OS's on one drive......Win2K-WinXP-WinXP-Win2K....All in that
order on all hidden primary partitions using a boot manager.....The
first Win2K is the problematic one......The remaining three accept
transfers perfectly......Maybe a particular software I'm using? That
would be hard to isolate.
All drivers are the same in the case of the 2K's.........The XP's were a
little stupid with a few but not a major issue.

>
> The problem may also not be within the networking kit, e.g. if a
> motherboard's hardware is corrupting IDE traffic, etc. I recall there
> was an issue with some VIA chipsets corrupting the tail end of bulk
> IDE transfers, and there can also be load-sensitive issues related to
> things like failing mobo caps.

This particular board is a ASUS A7V8X-LA with VIA KM400A Chipset....It's
a Hewlett Packard A720n.........Still interesting though how the other 3
OS's are perfect...........but ya may be on to something. ;0)

>
> Also, check that the LAN cables aren't running next to noisy mains
> leads etc. though that I would erxpect to affect all OSs equally.

Agreed.........Really nothing majorily disruptive near the
cable/s....Most cable lines are also very short....One in question is
only 3ft from the router.

>
> >> If it were only .EXE that were affected, I'd suspect a generic code
> >> infector such as CIH that's invalidating contents of self-extractors.
>
> >Possible...........Thanks again.
>
> I wouldn't expect a code infector corrupt big .AVI files, though.

Makes sense.............

>
> Are all the PCs the same hardware?
> Are they stable otherwise, e.g. on local HD-to-HD or CD-to-HD copies?

No to first.....Some vary drastically but all NIC cards are 10/100's.
Way yes to second.......I don't fool around... He, He... ;0)

> What motherboard chipsets?
> Is it a hub, switch or router?
> Does it help to take some PCs off the LAN at the hub/switch/router?
> ( I see you say "4-port router", but what is "8-port workstatrion"? )
>
> Switches isolate packet traffic to just the lines that are relevant,
> e.g. if PC1 talks to PC6, the traffic is only on lines 1 and 6. I
> presume routers do the same thing for internal traffic.
>
> In contrast, hubs just tie everything together, so that if PC1 talks
> to PC6, the packet traffic is on all lines 1 - 8.

I have a Linksys BEFSR41 Router(brand new) and a Linksys EZXS88W 10/100
8-port Workgroup Switch..........My main machine here & the HP are
connected to the router ports 1 & 2.....port 4 is the uplink port to my
workstation to feed the remaining 4 machines.......
I've tried switching/removing/replacing wires in various different
configurations to no avail(and removing some puters to answer above
question).....Still boils down to the same issue....I even connected all
machines to the 8-port and still same corruption on said OS..........
I mean I can do a clean install and I'm sure it won't happen, but than
again it may and I'll just delay the inevitable with a clean
install......My main machine is an ASUS A7M266 AMD761 chipset and had
quadruple the amount of software & hardware on it and it never gave me
this kind of issue.......I wonder if it's as simple as increasing a
number in the registry as I have had an issue once long while back with
IRPStacksize being to low and giving a tranfer error, but I made sure
the numbers match a non-problematic machine............

Hey, BTW, thanks for taking the time with me on this I really appreciate
it.........Amazing that I've tackled much heavier issues than this and
can't yet figure this one.............

Thanks again...........

.

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