Western Digital

Western Digital is the last manufacturer on our list.

The request queue contains only one request at a time:

Unlike hard disk drives from other makers, the WD team forms a dense group. The WD1600JB rises above the crowd somewhat, and the WD1600JD/60 worked well at high writes percentages. On the contrary, the WD1600JD/80 is rather poor at writing.

The positions of the drives haven’t changed under this higher load, only their read speeds increased from 75 to 100 IOps. Now we push the load up to 256 requests:

The speeds of the drives grew up and that’s about all to that. We can only single out the 1600LB that worked well in modes with a high writes percentage.