Pathetic DWPD? No dual-port SAS?
These aren't so much read-centric as "they don't fit anywhere we would stick a 10K drive, and is generally stupid if we did"-centric.
With a workload of 4K random writes (worst-case), DWPD is between 0.2 and 0.05. Best-case scenario (100% 128K sequential writes) the DWPD is 0.8.