Let’s see what we have at multithreaded writing now.
The two drives from Samsung and Seagate tested on the new testbed are in the lead at processing one thread. The leaders are followed by the two drives from Seagate tested on the old platform. The HDD from Western Digital is at the bottom of the diagram again.
The Samsung on the new platform is faster than when writing one thread! The same Samsung takes second place too, but it is over 18MBps slower than on the new testbed.
The HDDs from Hitachi have identical results although they differed at reading. Surprisingly, the Seagate HDDs are at the bottom of the diagram – they have been so good at multithreaded reading but fail here.
The speeds are lower when the HDDs are writing three threads, but the standings do not change. The Samsung is on top, the Seagate HDDs are at the bottom.
We’ve got the same picture at four threads. So, the HDDs from Samsung and Hitachi are the best at multithreaded writing whereas the Seagate HDDs are somewhat worse at writing than their opponents.
Comparing the absolute speeds, it turns out that the Seagate HDDs are indifferent to the type of multithreaded load. At multithreaded reading and writing they slow down by a half relative to their speed at one thread.
There are three points you can make from this test:
- Seagate’s HDDs are not as hopeless under multithreaded load as they used to be and are even very good at multithreaded reading.
- The Samsung SpinPoint F1 is superb at multithreaded writing. Besides that, it likes to work with a fast controller under this type of load.
- The HDD from Western Digital boasts optimized processor algorithms for multithreaded load. It is only slow due to the low initial (raw) speed of reading and writing.