Raw-disk-throughput

gistfile1.txt

hdparm -tT --direct /dev/<DEVICE>

AIO NVMe Intel Optane 990P
Timing O_DIRECT cached reads: 2423 MB/sec
Timing O_DIRECT disk reads: 2415 MB/sec

SSD SATA SAMSUNG PM863a 960GB
AVG Timing O_DIRECT cached reads: 472 MB/s
AVG Timing O_DIRECT disk reads:  507 MB/s

SSD SATA INTEL 3500 800GB
AVG Timing O_DIRECT cached reads: 350 MB/s
AVG Timing O_DIRECT disk reads:  431 MB/s

HDD SATA HUS726060ALA640 HGST Ultrastar 6TB
AVG Timing O_DIRECT cached reads: 274 MB/s
AVG Timing O_DIRECT disk reads: 180 MB/s

HDD SAS HUS726040ALS214 HGST Ultrastar 4TB
AVG Timing O_DIRECT cached reads:  852 MB/s
AVG Timing O_DIRECT disk reads: 200? MB/s