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Re: SanDisk Enters SSD High-Speed Field - Extreme 240GB with PC/NB Test
HD Tune Pro 5.00 set Black Size as 1MB can have the best performance.
64K - Write - Average 282.9 MB/s Access Time 0.099ms
1MB - Write - Average 335.2 MB/s Access Time 0.177ms
Read - Random Access & Extra tests
Write - Random Access & Extra tests
File Benchmark
Sequential Read - 60431 IOPS / Write - 911977 IOPS
ATTO DISK Benchmark over 512k test, max Read is 559.2 Mb/s and Write is 535.6 MB/s
HD Tune Pro 5.00 revises File Benchmark to be more detail. There are more paramaters for reference.
ATTO DISK Benchmark test result is over official Read 550 and Write 520 MB/s.
CrystalDiskMark
Seq Read - 524.6 MB/s Write - 298.3 MB/s
<All 0xFF, 0Fill> Read - 530.0 MB/s Write - 525.7 MB/s
<All 0x00, 1Fill> Read - 529.6 MB/s Write - 525.7 MB/s
CrystalDiskMark default test is random, As right-hand picture, the Write performance is lower.
This part is caused by SandForce controller structure. The performance will be lower as algorithm.
Left side CrystalDiskMark test changes to two pure sequential mode. The Write is close to official spec.
SandForce has special algorithm in Sequential Write. The speed starts from 280MB/s and ramp to 500 MB/s slowly.
This is also a weakness of SandForce controller.
AS SSD Benchmark - 824
Seq Read - 519.10 MB/s Write - 280.41 MB/s
4K - 64Thrd Read - 227.01 MB/s Write - 222.52 MB/s
SandForce structure will be changed by SSD capacity.
AS SSD Benchmark with 120GB is only 500, but it improves to 700~800 with 240GB.
You can see 240GB Write Seq/4K-64Thrd is much better than 120GB.
AS SSD Benchmark in personal experience, the ratio is more on 4K and 4K-64Thrd.
In these 2 items, if the transfer rate is higher, the total will be higher as well.
PCMark Vantage - HDD Score : 85720
CrystalMark Sequential Read 505.88 MB/s Sequential Write 501.55 MB/s
IOMETER 2008
1 minute - 100% Read / 100% Random 4KB
Total I/Os per Second 57420.61
3 minutes - 100% Read / 100% Random 4KB
Total I/Os per Second 56000.22
1 minute - 100% Write / 100% Random 4KB
Total I/Os per Second 91930.96
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