topic Volume size not correct with contents - reclaim in ONTAP Discussions

Volume size not correct with contents - reclaim

dirkslechten — Thu, 05 Jun 2025 05:33:51 GMT

hello,

I have a thin provisioned volume of 5TB. There is only a CIFS share on this volume.

When I select all the files in my browser it says it has 2.5TB of files

But the system says it has 3.6TB in use

Filesystem total used avail capacity Mounted on

/vol/CIFS_BACKUP2/ 5120GB 3643GB 1476GB 71% /vol/CIFS_BACKUP2/

These are the options of the volume

vol options CIFS_BACKUP2

nosnap=on, nosnapdir=on, minra=off, no_atime_update=off, nvfail=off,

ignore_inconsistent=off, snapmirrored=off, create_ucode=on,

convert_ucode=on, maxdirsize=45875, schedsnapname=ordinal,

fs_size_fixed=off, guarantee=none, svo_enable=off, svo_checksum=off,

svo_allow_rman=off, svo_reject_errors=off, no_i2p=off,

fractional_reserve=0, extent=off, try_first=volume_grow,

read_realloc=off, snapshot_clone_dependency=off, dlog_hole_reserve=off,

nbu_archival_snap=off

There are no snapshots on the volume

snap list CIFS_BACKUP2

Volume CIFS_BACKUP2

working...

No snapshots exist.

I know that the Volume is thin provisioned, but how can you reclaim space from this?

Thank you in advance

aborzenkov — Wed, 25 Jun 2014 16:02:02 GMT

Do you have large number of small files (less than 4K)?

dirkslechten — Fri, 27 Jun 2014 10:45:47 GMT

there are 125 files and 5 folders.

It is a B2D folder where large images are saved such as acronis etc

SNAPCLONE — Thu, 14 Aug 2014 19:28:57 GMT

I had a very similar problem. A few questions: What version of ONTAP are you running? And, is Storage Efficiency enabled on this volume?

I'm on 8.1, and was able to reclaim the missing space by running the following two commands:

sis start -s <volume_name>

When it completes (mine took over 12 hours):

sis off <volume_name>