Re: Files copied to external hard drive are corrupted
- From: Arno Wagner <me@xxxxxxxxxxx>
- Date: 28 Jun 2006 17:13:51 GMT
Previously DJ Kazuya <djkazuya@xxxxxxxxxxxxx> wrote:
I recently bought a Maxtor external hard drive for use to transfer
files from an older, space-challenged computer. I had no need for the
backup software, so I just plugged it in (USB 2.0) and Windows XP
recognized it as an empty NTFS drive. So I did a drag and drop of
around 75GB of files onto the new drive. The files are almost all RAR
archives ranging from 5MB to 50MB (the vast majority are around 10MB).
So we're talking about a few thousand files. The copying was fast and
went smoothly. Out of the 1000 or so of the copied archives I've
tested so far on the new drive about 9 or 10 of the archives were
corrupted. I checked the originals and they were fine, and when I
individually re-copied those archives on the new drive they ended up
fine... but it seems that invariably about 1 out of every 100 of the
archives copied during the "mass copying" is turning up bad. Is this
just a consequence of doing such a massive amount of copying at once,
especially over USB instead of a more proven interface like IDE? Or
Not really.
could there be something more at work here, such as a bad external
drive or Windows screwing up? I've only had the drive for a few days
but all seems well with it; it's very quiet and runs cool.
I would suspect that this is actually a problem with defective
hardware in your PC. A very good candidate is defective RAM.
On bulk copies a larger portion of the main meory is used for
buffering. It may be that the defective bit(s) are only used
then.
Advice: Run memtest86+ from http://www.memtest.org/ for some
time. Usually a few hours are enough for reliable diagnosis,
although I had one Infinion RAM that exhibited one error in
about 30 hours of testing. Still cirrupted data.
Arno
.
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