While testing a problem LUN for read errors, I encountered the following problem:
find /mnt/problem_lun/ -type f -print -exec dd if={} of=/dev/null bs=8k \;
...
/mnt/problem_lun/a_file
dd: writing `/dev/null': File too large
33619977+0 records in
33619976+0 records out
275414843392 bytes (275 GB) copied, 804.171 s, 342 MB/s
IBM hardware, RHEL 6.6
Who's the culprit, provided this particular file could be read without any errors?