Datasheet

MemoRight NAND Flash-based Solid State Drive
MemoRight Confidential Page 14 3/6/2009
8 KBytes 45.97 5,884
64KBytes 97.19 1,555
128 KBytes 101.34 811
0.5KBytes 8.42 17,238
4 KBytes 52.09 13,336
8 KBytes 75.35 9,645
64KBytes 104.04 1,665
Consecutive
write(typical)
128 KBytes 104.01 832
0.5KBytes 4.72 9,675
4 KBytes 20.80 5,325
8 KBytes 33.10 4,236
64KBytes 83.73 1,340
Random
read(typical)
128 KBytes 93.40 747
0.5KBytes 0.30 605
4 KBytes 1.33 341
8 KBytes 1.78 228
64KBytes 9.77 156
Random
write(typical)
128 KBytes 17.60 141
3.9 Start/stop time
Table 9:Start/stop time
Time to ready Typical(sec) Max(sec)
Power-on to ready
1 10
Warm-up time
5 10
Standby to ready
0.1 0.1
Power-off to power-on
1 /
Power-off to cache flush
done
0.1 1
The MemoRight’s NSSD have an on-drive backup power system. It saves energy when the power
supply is applied to drive. When power-off occurring, the saved energy will be released to keep the
drive working for a while. The saved energy ensures the data in the cache can be flushed to the
nonvolatile flash media,
which prevents the data loss to happen.
It will take about 5 seconds to save enough energy for discharge at lease 1 second. The write cache
will be disabled automatically before the backup power system saved enough energy.
The cycle number of the backup power system is at lease 300,000 to ensure covering the lifespan of
the drive.
3.10 Write endurance
The write endurance is mostly depending on the write model since each write to flash will cause an
erase operation of the data block. Consecutive write will be better than random write, and large date
block will be better than small data block.
Table 10:Write endurance
Request size TBytes/GBytes IO/GBytes
2 KBytes >100 >5×10
10
16 KBytes >100 >6.3×10
9
Consecutive write
128 KBytes >100 >7.8×10
8
Random
2 KBytes >1.6 >8×10
8