Multiple messages "FATAL: Failed to read file! file: 128 pos: 2588672 errno = 0 ()" when testing industrial Compact Flash

Not sure if this is a bug, or a legit. problem found by sysbench.

I am testing a new industrial rated compact flash memory on an embedded Atom system. We are using Debian Squeeze. I ran a test of tests with this command:

while true; do sysbench --num-threads=16 --test=fileio --file-total-size=3500M --file-test-mode=rndrw prepare; sysbench --num-threads=16 --test=fileio --file-total-size=500M --file-test-mode=rndrw run; sync; sysbench --num-threads=16 --test=fileio --file-total-size=3500M --file-test-mode=rndrw cleanup; done

and let it run for about 3 weeks.

When I returned I saw a lot of messages like these on the console output

FATAL: Failed to read file! file: 127 pos: 2965504 errno = 0 ()
FATAL: Failed to read file! file: 127 pos: 540672 errno = 0 ()
FATAL: Failed to read file! file: 130 pos: 655360 errno = 0 ()
FATAL: Failed to read file! file: 129 pos: 2441216 errno = 0 ()
FATAL: Failed to read file! file: 129 pos: 475136 errno = 0 ()
FATAL: Failed to read file! file: 128 pos: 2588672 errno = 0 ()
FATAL: Failed to read file! file: 126 pos: 2588672 errno = 0 ()
FATAL: Failed to read file! file: 127 pos: 2899968 errno = 0 ()
FATAL: Failed to read file! file: 125 pos: 3309568 errno = 0 (T¦v¦)
FATAL: Failed to read file! file: 126 pos: 49152 errno = 0 (¦v¦0R0¦¦¦v¦R0¦¦u¦¦Q0¦T¦Q0¦T¦v¦)

Does this indicate an actual problem found with the Compact Flash hardware, or could it be a bug in sysbench? This answer is very important as we will need to deploy 1000s of these parts and they need to be reliable.