File system notes

From raju

zfs

Unlike most filesystems, ZFS and btrfs write a checksum with every block of data (both data and metadata) written to the drive, and the checksum is verified at read time. Most filesystems don’t do this, because theoretically the hardware should detect all errors. But in practice, it doesn’t always, which can lead to silent data corruption. This is one reason to use zfs.

Ref:- http://changelog.complete.org/archives/9769-silent-data-corruption-is-real