SQFlash

mSATA 630

Specifications subject to change without notice, contact your sales representatives for the most update information.

REV 0.5

Page 7 of 25

Jun. 8, 2015

 Endurance

According to JEDEC subcommittee JC-64.8, the actual endurance of flash storage can be presented by

Terabyte Write (TBW), which is measured by NAND Flash physical endurance, Wear-leveling Efficiency

(WLE) and Write Amplification Factor (WAF) of specific capacities with following formula.

TBW = [(NAND Flash Physical Endurance) x Capacity x WLE] / WAF



TBW of sequential writing

WLE

WAF

TBW

SLC

Ultra MLC

MLC

1 GB

0.9130

1.1013

80

--

--

2 GB

0.9130

1.1017

161

32

--

4 GB

0.9130

1.1025

323

64

9

8 GB

0.9120

1.1026

646

129

19

16 GB

0.9120

1.1031

1291

258

38

32 GB

0.9120

1.1029

2584

516

77

64 GB

0.9110

1.1039

5157

1031

154

128 GB

0.9110

1.1039

--

2603

309

256 GB

0.9100

1.1041

--

--

618



TBW of random writing

WLE

WAF

TBW

SLC

Ultra MLC

MLC

1 GB

0.9130

1.2176

73

--

--

2 GB

0.9130

1.2837

138

27

--

4 GB

0.9130

1.3034

273

54

8

8 GB

0.9120

1.3278

536

107

16

16 GB

0.9120

2.2323

638

127

19

32 GB

0.9120

2.3535

1210

242

36

64 GB

0.9110

2.4396

2333

466

70

128 GB

0.9110

2.3141

--

984

147

256 GB

0.9100

2.2614

--

--

301