Hi Bill,
I just discovered that I had written this Wiki article in 2009; to my surprise, the information is still largely up-to-date.
We went the pragmatic way here in our lab and are using CentOS 7 with XFS (the default). We setup all system disks as RAID1; the (synchrotron) data disks are RAID6 (48TB I think). We regularly (once/month) "scrub" the disks and document all findings in an internal wiki. Disks die from time to time and get replaced; we have never lost any data. The synchrotron files are bzip2-ed to save space; bzip2 has a testing option which checks the checksums and we've never seen bitrot. I believe that bitrot is not a real problem (because this is what Neil Brown, the md developer, says); the biggest problem is that the death of disks in a RAID goes un-noticed until finally real data are lost. Be sure to have backups because user errors happen.
Concerning your Mac problems, I found my following note:
"if some files in NTFS folder greyed out in Finder, cannot be read on Windows PC: ls -l@ (in a terminal) shows extended attributes, xattr -d com.apple.FinderInfo <filename> removes attribute."
Don't know if this helps.
HTH,
Kay
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