I'm not sure what you mean when you say your files are not copying
correctly. How exactly are they corrupt? What convinces you of this?
Bob
On 06/27/2009 08:21 AM, Andy Campbell wrote:
I'm having an issue where when I copy files, they are not copying
correctly - they are corrupt, I've checked using cmp, and generating
md5sum There are no errors I can see from cp, rsync.
Initially I though it was a problem with an external USB drives now
after some testing it seem to be normal SATA drives as well. I've got
a few drives in the box and they all have the same issue.
I thought it might be memory - but memtest runs fine, and I
tried taking out a couple of the sticks - I have 4x2Gb no difference.
I've written a little rsync script to copy some files around, rsync
once, then rsync again, using checksum - in theory the second run
should have nothing to do, but will randomly have to re-copy files.
Strangely I tried booting off of a live distro ( System Rescue 32bit )
and didn't get any errors.
The system seem to run fine generally - but I started noticing some of
the big files I was syncing to external drives where erroring. Just
repeatedly running md5sum on a file gives consistent results - I would
have though if was a memory problem that would have give different
results.
I've turned AHCI on in BIOS recently as I've install a WD Raptor,
and re-installed F10 - would that affect filesystems on other
drives - is AHCI buggy ?
I'm using Fedora 10 64bit, Asus P5Q-E Motherboard,
Q9950 ( stock speed ), 8Gb Corsair memory
Any guesses, Kernel bug ? Hardware ? Hopefully not hardware as its
a fairly recent build.
My Test some runs are better some are worse ....
(1) [trantor] ..scratch/tmp $cat do_test.bash
#/bin/bash
echo === Copying test files to /tmp
mkdir -p src tgt
for i in 1 2 3 4 5 6 7 8 9
do
echo "================================== test $i"
rm -f tgt/*zip
echo Initial Copy from src to tgt
rsync -a src/*zip tgt/
echo
echo Second Copy with checksum - should be no files to copy
echo
rsync -a -v --checksum src/*zip tgt/
done
[trantor] ..scratch/tmp $./do_test.bash
=== Copying test files to /tmp
================================== test 1
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file6.zip
sent 278691256 bytes received 31 bytes 8319142.90 bytes/sec
total size is 1422447131 speedup is 5.10
================================== test 2
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file1.zip
file3.zip
file6.zip
file7.zip
file8.zip
sent 1121629814 bytes received 107 bytes 21364379.45 bytes/sec
total size is 1422447131 speedup is 1.27
================================== test 3
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file3.zip
file4.zip
file5.zip
file7.zip
sent 803961910 bytes received 88 bytes 16925515.75 bytes/sec
total size is 1422447131 speedup is 1.77
================================== test 4
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file1.zip
file3.zip
file7.zip
sent 726571560 bytes received 69 bytes 15625196.32 bytes/sec
total size is 1422447131 speedup is 1.96
================================== test 5
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file1.zip
file4.zip
file7.zip
sent 642641285 bytes received 69 bytes 11791584.48 bytes/sec
total size is 1422447131 speedup is 2.21
================================== test 6
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file1.zip
file2.zip
file3.zip
file4.zip
file6.zip
file8.zip
sent 916463546 bytes received 126 bytes 17795411.11 bytes/sec
total size is 1422447131 speedup is 1.55
================================== test 7
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file3.zip
file5.zip
file6.zip
file7.zip
sent 975716123 bytes received 88 bytes 18585070.69 bytes/sec
total size is 1422447131 speedup is 1.46
================================== test 8
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
file3.zip
file4.zip
file6.zip
sent 576495041 bytes received 69 bytes 13891448.43 bytes/sec
total size is 1422447131 speedup is 2.47
================================== test 9
Initial Copy from src to tgt
Second Copy with checksum - should be no files to copy
sending incremental file list
sent 288 bytes received 12 bytes 10.17 bytes/sec
total size is 1422447131 speedup is 4741490.44
Thanks
Andy
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