complicated. In this section, we describe how the recovery
process can be simplified in the proposed method. As explained
in Section III-A, the deduplication is applied before the parity
calculation so that the parity does not contain eliminated data.
The exclusion of duplicated data for parity enables the simple
data recovery process. For a deduplicated stripe, if we apply the
deduplication after the parity calculation, we need to recover
the original data first. If this procedure is repeated for multiple
times, called chained recovery, the recovery time would be
significantly increased.