SSD Endurance

Matthew Dillon dillon at
Thu Mar 12 13:42:57 PDT 2015

    Yes, with the last two writing well over 2 peta-bytes (2000 TB) before
    giving up the ghost.  Quite impressive.

    One word of warning, one thing that authors did not test well here
    was unpowered data retention.  As flash cells wear out, the data
    retention tends to head downward.  A brand new flash cell can retain
    data for around 10 years unpowered but that drops to a year or less for
    a cell getting near its wear limit.

    When left powered, SSDs do internal scans and will slowly fix up cells
    before the data becomes unrecoverable.


More information about the Users mailing list