Drive Samsung SSD 850 EVO 250GB diskinfo -c /dev/ada0 /dev/ada0 I/O command overhead: time to read 10MB block 0.023609 sec = 0.001 msec/sector time to read 20480 sectors 1.838536 sec = 0.090 msec/sector calculated command overhead = 0.089 msec/sector Drive Samsung SSD 850 EVO 250GB diskinfo -c /dev/ada1 /dev/ada1 I/O command overhead: time to read 10MB block 0.025898 sec = 0.001 msec/sector time to read 20480 sectors 2.162736 sec = 0.106 msec/sector calculated command overhead = 0.104 msec/sector Drive Samsung SSD 850 EVO 250GB diskinfo -c /dev/ada2 /dev/ada2 I/O command overhead: time to read 10MB block 0.022440 sec = 0.001 msec/sector time to read 20480 sectors 1.959554 sec = 0.096 msec/sector calculated command overhead = 0.095 msec/sector Drive Samsung SSD 850 EVO 250GB diskinfo -c /dev/ada3 /dev/ada3 I/O command overhead: time to read 10MB block 0.023476 sec = 0.001 msec/sector time to read 20480 sectors 2.169363 sec = 0.106 msec/sector calculated command overhead = 0.105 msec/sector Drive WDC WD2003FZEX-00SRLA0 2TB diskinfo -c /dev/ada4 /dev/ada4 I/O command overhead: time to read 10MB block 0.054429 sec = 0.003 msec/sector time to read 20480 sectors 0.538953 sec = 0.026 msec/sector calculated command overhead = 0.024 msec/sector Drive WDC WD2003FZEX-00SRLA0 2TB diskinfo -c /dev/ada5 /dev/ada5 I/O command overhead: time to read 10MB block 0.059648 sec = 0.003 msec/sector time to read 20480 sectors 0.543571 sec = 0.027 msec/sector calculated command overhead = 0.024 msec/sector Drive WDC WD40EFRX-68N32N0 4TB diskinfo -c /dev/da0 /dev/da0 I/O command overhead: time to read 10MB block 0.068958 sec = 0.003 msec/sector time to read 20480 sectors 7.710479 sec = 0.376 msec/sector calculated command overhead = 0.373 msec/sector Drive Kindle Internal Storage 0100 diskinfo -c /dev/da1