hi, guys:
when I read the filestore.cc, I find the ceph use crc the check the data. Why
should check the data?
In my knowledge, the disk has error-correcting code (ECC) for each sector.
Looking at wiki: http://en.wikipedia.org/wiki/Disk_sector, "In disk drives,
each physical sector is made up of three basic parts, the sector header, the
data area and the error-correcting code (ECC)". So if the data is not correct.
the disk can recovery it or return i/o error.
Does anyone can explain it?
Thanks
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