PC-SDD32V3-SC, PC-SDD64V3-SC, PC-SDD320V3-SC
CONTEC CO., LTD.
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Example 2:
All 40MB of a 40MB file is overwritten once every 5 minutes
This corresponds to case (ii)
Average number of writes before failure [No. of accesses]
= 4,325,538
Number of writes per hour [No. of accesses/Hour]
= 12 (Once every 5 minutes)
Mean time before failure for write access [Hours] = 4,325,538/12
= 360,461 (= 41 years approx.)
Example 3:
Number of swaps per hour and swap interval that will give a mean time before
failure of 10 years (87,600 hours), when the swap size is 32MB or more
This corresponds to case (ii)
Number of swaps per hour [No. of accesses/Hour]
= 4,325,538/87,600 = 49.3
Swap interval [Minutes/Swap] = 60/49.3 = 1.21
Accordingly, if the measured swap interval is 1.21 minutes or more, the
mean time before failure will be 10 years or longer.