А где искать пропавшие ~ 2Гб?
USEDSNAP = 4,27G, но сумма всех снапшотов не больше 2Гб. Куда остальное ушло:
$ sudo zfs list -t all -ro space tank/opt
NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD
tank/opt 1,08T 7,44G 4,27G 3,17G 0 0
tank/opt@zfs-auto-snap_monthly-2017-04-23-0503 - 1,25G - - - -
tank/opt@zfs-auto-snap_monthly-2017-05-23-0457 - 8,27M - - - -
tank/opt@zfs-auto-snap_monthly-2017-06-22-0445 - 8,27M - - - -
tank/opt@zfs-auto-snap_monthly-2017-07-22-0459 - 8,24M - - - -
tank/opt@zfs-auto-snap_monthly-2017-08-22-0446 - 8,24M - - - -
tank/opt@zfs-auto-snap_monthly-2017-09-21-0458 - 39,4M - - - -
tank/opt@zfs-auto-snap_monthly-2017-10-22-0854 - 8,63M - - - -
tank/opt@zfs-auto-snap_monthly-2017-11-20-0501 - 8,65M - - - -
tank/opt@zfs-auto-snap_monthly-2017-12-20-0506 - 40,2M - - - -
tank/opt@zfs-auto-snap_monthly-2018-01-20-0502 - 38,7M - - - -
tank/opt@zfs-auto-snap_weekly-2018-02-01-0453 - 8,42M - - - -
tank/opt@zfs-auto-snap_weekly-2018-02-08-0500 - 8,43M - - - -
tank/opt@zfs-auto-snap_weekly-2018-02-15-0452 - 8,43M - - - -
tank/opt@zfs-auto-snap_monthly-2018-02-17-0445 - 8,43M - - - -
tank/opt@zfs-auto-snap_weekly-2018-02-22-0443 - 8,43M - - - -
tank/opt@zfs-auto-snap_daily-2018-02-23-0456 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-02-24-0440 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-02-25-0504 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-02-26-0449 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-02-27-0506 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-02-28-0503 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-01-0502 - 0 - - - -
tank/opt@zfs-auto-snap_weekly-2018-03-01-0502 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-02-0459 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-03-0448 - 8,42M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-04-0501 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-05-0441 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-06-0447 - 8,43M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-07-0449 - 8,43M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-08-0450 - 0 - - - -
tank/opt@zfs-auto-snap_weekly-2018-03-08-0450 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-09-0446 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-10-0458 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-11-0451 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-12-0505 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-13-0459 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-14-0501 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-15-0445 - 0 - - - -
tank/opt@zfs-auto-snap_weekly-2018-03-15-0446 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-16-0453 - 8,43M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-17-0504 - 0 - - - -
tank/opt@zfs-auto-snap_monthly-2018-03-17-0504 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-18-0437 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-19-0505 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-20-0436 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-21-0440 - 8,43M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-22-0442 - 0 - - - -
tank/opt@zfs-auto-snap_weekly-2018-03-22-0442 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-23-0458 - 8,42M - - - -
tank/opt@zfs-auto-snap_daily-2018-03-24-0500 - 0 - - - -
tank/opt@zfs-auto-snap_daily-2018-03-25-0454 - 0 - - - -
