I bought a couple of 1TB WD Blue drives for backup purposes (WD10EZEX) and a 1TB WD Black for boot drive purposes (WD1002FAEX) and before putting them into service I ran Diglloyd DiskTester on them (primarily to see if they were duds or good).
Much to my surprise, both the read and write speeds on the Blues were significantly faster than on the Black (read = 185 Blue on outer tracks vs read = 128 Black on outer tracks). Both Blues tested the same.
I also have a slightly older 1TB WD Black (WD1001FALS) whose performance is essentially identical to the newer Black.
The Diglloyd test writes (and then reads back) 1000 files of approximately 1GB each, and, of course, the read/write speeds slow down as the drive gets to the inner tracks.
I then ran BlackMagicDesign DiskSpeedTest on the drives, and had essentially the same results: the WD Blacks had read/write speeds of approx 125MB/sec and the Blues 175MB/sec.
Finally, I ran AJA System Test on the drives, and again, exactly the same results (~175MB/sec Blue vs ~125MB/sec Black).
This makes no sense to me. I can't see why/how the new Blues should be faster than the (new and older) Blacks.
Am I missing something obvious?
(I should mention that prior to running the tests I erased the drives so all the writes were being done on a completely blank drive)
Much to my surprise, both the read and write speeds on the Blues were significantly faster than on the Black (read = 185 Blue on outer tracks vs read = 128 Black on outer tracks). Both Blues tested the same.
I also have a slightly older 1TB WD Black (WD1001FALS) whose performance is essentially identical to the newer Black.
The Diglloyd test writes (and then reads back) 1000 files of approximately 1GB each, and, of course, the read/write speeds slow down as the drive gets to the inner tracks.
I then ran BlackMagicDesign DiskSpeedTest on the drives, and had essentially the same results: the WD Blacks had read/write speeds of approx 125MB/sec and the Blues 175MB/sec.
Finally, I ran AJA System Test on the drives, and again, exactly the same results (~175MB/sec Blue vs ~125MB/sec Black).
This makes no sense to me. I can't see why/how the new Blues should be faster than the (new and older) Blacks.
Am I missing something obvious?
(I should mention that prior to running the tests I erased the drives so all the writes were being done on a completely blank drive)
