列出硬盘
# egrep 'ad[0-9]|cd[0-9]' /var/run/dmesg.boot
or
# geom disk list
or
# camcontrol devlist
查看cache 命中率
sset_tool -T ".foreach(REPO/LOCALHOST/vfs.zfs.pz.cache.hit_rate.series).range(-1h,-1,0).print(default,1)"
Ref:
https://www.cyberciti.biz/faq/freebsd-hard-disk-information/
https://unix.stackexchange.com/questions/175814/list-all-connected-devices-in-freebsd