Incorrect reported free space after deletion of large file

[golfing22]

Hi,

Thanks in advance for any help.

I'm using FreeNAS with 4x2TB hard drives with ZFS to host iSCSI volumes. Recently I deleted a large file (~2TB) from my zfs drive but the free space did not increase at all. I'm currently running a scrub but it will take a few days to complete. I believe that there are no snapshots on the disk either.

Any ideas?

Code:

[root@freenas] ~# df -h
Filesystem             Size    Used   Avail Capacity  Mounted on
/dev/ufs/FreeNASs1a    927M    379M    474M    44%    /
devfs                  1.0K    1.0K      0B   100%    /dev
/dev/md0               4.6M    1.9M    2.3M    44%    /etc
/dev/md1               824K    2.0K    756K     0%    /mnt
/dev/md2               149M     14M    124M    10%    /var
/dev/ufs/FreeNASs4      20M    363K     18M     2%    /data
storage                5.3T    4.7T    669G    88%    /mnt/storage

Code:

[root@freenas] ~# du -ah /mnt/storage
 66G    /mnt/storage/vm
 68G    /mnt/storage/exchange
663G    /mnt/storage/asigra
797G    /mnt/storage

Code:

[root@freenas] ~# zfs list -t all
NAME      USED  AVAIL  REFER  MOUNTPOINT
storage  4.68T   669G  4.68T  /mnt/storage

Code:

[root@freenas] ~# zfs list -t snapshot
no datasets available