I’m collecting some disk speed tests on hardware (mostly SD cards), to truly understand the real speed Vs the advertised speed.
For testing I’ll use CrystalDiskMark (you can download it here: http://crystalmark.info/software/CrystalDiskMark/index-e.html). The portable version is fine.
Under Mac, I’ll use AmorphousDiskMark: it’s a “clone” of CrystalDiskMark.
For reference, this is the speed test on my SSD
Samsung SSD 840 EVO 250GB
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s] * KB = 1000 bytes, KiB = 1024 bytes Sequential Read (Q= 32,T= 1) : 540.695 MB/s Sequential Write (Q= 32,T= 1) : 508.687 MB/s Random Read 4KiB (Q= 32,T= 1) : 215.583 MB/s [ 52632.6 IOPS] Random Write 4KiB (Q= 32,T= 1) : 180.954 MB/s [ 44178.2 IOPS] Sequential Read (T= 1) : 505.612 MB/s Sequential Write (T= 1) : 489.657 MB/s Random Read 4KiB (Q= 1,T= 1) : 26.878 MB/s [ 6562.0 IOPS] Random Write 4KiB (Q= 1,T= 1) : 60.125 MB/s [ 14679.0 IOPS] Test : 1024 MiB [C: 59.6% (40.5/67.9 GiB)] (x5) [Interval=5 sec] Date : 2016/03/20 12:00:46 OS : Windows 10 [10.0 Build 10586] (x64)
Qumox 32GB MICRO SD CLASS 10 UHS-I
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 20.497 MB/s
Sequential Write (Q= 32,T= 1) : 16.488 MB/s
Random Read 4KiB (Q= 32,T= 1) : 2.697 MB/s [ 658.4 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 0.454 MB/s [ 110.8 IOPS]
Sequential Read (T= 1) : 22.230 MB/s
Sequential Write (T= 1) : 17.408 MB/s
Random Read 4KiB (Q= 1,T= 1) : 2.903 MB/s [ 708.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 0.498 MB/s [ 121.6 IOPS]
Test : 1024 MiB [E: 0.0% (0.0/29.5 GiB)] (x5) [Interval=5 sec]
Date : 2016/03/20 11:35:47
OS : Windows 10 [10.0 Build 10586] (x64)
Sandisk Ultra MicroSDXC 128 GB – SDSQUNC-128G-GN6MA
