Appendix L: Solid State Discs Set Off Flash Flood
A Solid State Disc (SSD) mimics a HDD but with non-volatile flash memory replacing rotating platters. Will SSD replace HDD anytime soon? For some applications, it’s happening now; for others, it may never happen. Comparing the two technologies is partially an “apples to oranges” scenario. True, they are both fruit—but the differences are significant even with identical I/O ports (SATA or SAS) and slot form factor.
The key SSD advantages over HDD are as follows: nearly instantaneous R/W access; lower active power consumption by 3–5× and ~40× for inactive state; no moving parts; robust, longer MTBF by a factor of ~3×; no noise; no file fragmentation. Surprisingly, SSD is not far behind HDD in terms ...
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