Bernie Rub - Flash Memory Summit

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EARLY ADOPTION OF SLC MAKES SENSE • SLC has been the media of choice for write intensive applications • SLC spec advantages appear compelling: – x33 Endurance: 100K vs. 3K – x3 Program Speed: Tprog = 0.5ms vs. 1.5ms • But history suggests that the denser solution will prevail • How? SMART STORAGE SYSTEMS Company Confidential
ANALYSIS OF WRITE CAPABILITY • Drive Writes Per Day (DWPD) – Amount of writing that can be sustained over the entire product life – Normalized to Drive Capacity – Assume random writes uniformly distributed over entire logical address space. This is much more stringent than sequential writing • Typical SSD specs: – SLC: 25 DPWD – MLC:
Page 1 and 2: SMART STORAGE SYSTEMS Company Confi
Page 3 and 4: IT’S ALL ABOUT DENSITY! •It’s
Page 5 and 6: HISTORICAL PERSPECTIVE (2) 1,7 RLL
Page 7: LESSONS LEARNED • Not surprisingl
Page 11 and 12: WRITE AMPLIFICATION • Write Ampli
Page 13 and 14: WRITE AMPLIFICATION VS. OP Write Am
Page 15 and 16: MLC ENDURANCE ENHANCEMENTS • The
Page 17 and 18: CHANGING LANDSCAPE MLC-EE 28%OP exc
Page 19 and 20: MLC DELIVERS ONE-TWO PUNCH Density
Page 21 and 22: EVOLUTION OF ENTRY LEVEL SSDS Endur
Page 23 and 24: CONSUMPTION MODEL TIME TO REPLACE S
Page 25: SMART STORAGE SYSTEMS Company Confi

Bernie Rub - Flash Memory Summit

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