The performance is excellent!
Since some of my internal 3.5 "branded plates (approx 1-2 years old) are more slowly!
USB 3.0 is also useful, because even when random access (512KB)
creates the plate even more than with USB 3.0 is theoretically possible.
All in all, the external disk a success for my use as a backup medium.
As USB 2.0 it works for me only with a cable,
but you should pay attention to sufficient current values of the USB ports when using the laptop.
So it may be necessary an optional cable.
Benchmarks:
with USB 3.0
CrystalDiskMark 3.0.2 x64 (C) 2007-2012 hiyohiyo
Crystal Dew World: [... 9
-------------------------------------------------- ---------------------
* MB / s = 1,000,000 bytes / sec [SATA / 300 = 300,000,000 bytes / s]
Sequential Read: 108 971 MB / s
Sequential Write: 108.151 MB / s
Random Read 512KB: 36,152 MB / s
512KB Random Write: 43,611 MB / s
4KB Random Read (QD = 1): 0.419 MB / s [102.3 IOPS]
Random Write 4KB (QD = 1): 0.868 MB / s [211.9 IOPS]
4KB Random Read (QD = 32): 0.493 MB / s [120.2 IOPS]
Random Write 4KB (QD = 32): 0.853 MB / s [208.2 IOPS]
Test: 4000 MB [G: 0.0% (0.0 / 931.3 GB)] (x3)
Date: 04/12/2013 15:39:49
OS: Windows 8 [6.2 Build 9200] (x64)
______________________
as USB 2.0:
-------------------------------------------------- ---------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2012 hiyohiyo
Crystal Dew World: [... 9
-------------------------------------------------- ---------------------
* MB / s = 1,000,000 bytes / sec [SATA / 300 = 300,000,000 bytes / s]
Sequential Read: 31 848 MB / s
Sequential Write: 31 387 MB / s
Random Read 512KB: 19,920 MB / s
512KB Random Write: 30,600 MB / s
4KB Random Read (QD = 1): 0.381 MB / s [93.0 IOPS]
Random Write 4KB (QD = 1): 0.832 MB / s [203.2 IOPS]
4KB Random Read (QD = 32): 0.478 MB / s [116.7 IOPS]
Random Write 4KB (QD = 32): 0.829 MB / s [202.4 IOPS]
Test: 4000 MB [G: 0.0% (0.0 / 931.3 GB)] (x3)
Date: 04/12/2013 16:41:33
OS: Windows 8 [6.2 Build 9200] (x64)
