JEDEC SSD Specifications Explained

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Extrapolation methods ‣ Extrapolation methods may be used if the direct method would require more than 1000 hours of endurance stress. ‣ Most of these methods require special access to SSD internal operations or to NVM component information which make these methods possible only for the manufacturer of the SSD.
General requirements for extrapolation methods 1. The SSD must meet the requirements for FFR and UBER for the temperatures and times stated in the table. 2. The FFR and UBER requirements must be met for both lowtemperature and high-temperature endurance stressing. 3. Data retention is to be verified under the assumption that the endurance stressing in use takes place over no longer than 1 year at the endurance use temperature and hours per day of use are as specified per application class. 4. Data retention is to be verified both for a temperatureaccelerated mechanism (1.1eV) and a non-temperatureaccelerated mechanism. 5. All requirements are to be established at 60% statistical confidence.
Page 1 and 2: JEDEC SSD Specifications Explained
Page 3 and 4: What do these standards include?
Page 5 and 6: Reference Documents ‣ JESD22-A117
Page 7 and 8: Key Definitions ‣ Erase block - T
Page 9 and 10: Key Definitions ‣ Solid state dri
Page 11 and 12: Key Definitions ‣ Write amplifica
Page 13 and 14: # corrupt sectors per drive UBER eq
Page 15 and 16: UBER determination ‣ Although the
Page 17 and 18: WAF ‣ Factors that impact WAF: -
Page 19 and 20: WAF example The figure shows one NA
Page 21 and 22: WAF example Note that had the examp
Page 23 and 24: Application classes ‣ Current app
Page 25 and 26: Endurance rating The SSD manufactur
Page 27 and 28: Temperatures and data retention ‣
Page 29 and 30: Endurance rating example The estima
Page 31 and 32: Endurance rating example The NAND c
Page 33 and 34: Verification goals ‣ Reasonable t
Page 35 and 36: Direct versus extrapolation ‣ Bot
Page 39: Direct method ‣ Best method but n
Page 43 and 44: Accelerated write rate through modi
Page 45 and 46: Extrapolation of FFR and bad- locat
Page 47 and 48: Reduced-capacity SSD ‣ Qualificat
Page 49 and 50: FFR and UBER estimation from compon
Page 51 and 52: Endurance workloads ‣ Client work
Page 53 and 54: Enterprise workload ‣ Several wor
Page 55 and 56: Questions

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