Flash
Technology Trends
Transitioning from SLC
to MLC
•Significant challenge to flash reliability
Media Wearout
•Reads and writes have degrading effect
on flash data retention
-P/E
cycle
•Data retention reduces over time – from 10 yrs to 1 yr.
•SSDs wear
out
-SLC 100,000
P/E Cycles
-MLC 10,000
P/E Cycles
Slide Source - EC MD
MLC
SLC
HDD
# of writes allowed per LBA
10K Writes
100K Writes
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