Reclaim Deleted Space

There is a bug in the ReadyNAS software. I deleted more files, roughly 30GB. Using Frontview:

Volume Settings, Volume C:
3674 GB (99%) of 3701 GB used

I deleted 31GB of space:

3644 GB (98%) of 3701 GB used

I'm losing 1 GB of space somewhere. I'll have to reformat and just copy everything back. Not happy but there is nothing left to do here.

Not sure you need to reformat myself. There are some small discrepancies between SAMBA/EXT and NTFS, and also you need to be cautious on the units (GiB, not GB) and rounding.

The main thing you want to do is delete a bunch more stuff (getting you down to 80-85% of total capacity)

Thanks for all the help and the advice - I already deleted it all and reformatted. I'm going to upload the media using TeraCopy, which is much more reliable than using Windows Explorer so perhaps there is something good here in the end. I believe that you are right with the discrepancies between NTFS and EXT, as well as having the overhead from the operating system on the disk. And yes, the rounding would probably be GiB or fractions of a GB.

I have two Ultra 2s. I figure that they are more than good enough to act as fileservers and stream media to Plex or a device like the WD Play. I'm going to refill them with media again, leaving some extra space. Is there any reason why I'd want to use only 80-85% rather than something like 95-97% capacity? 3% is actually quite large. Even 1% comes out to around a 36GB buffer.

The general rule of thumb for ext (and really most file systems) is that fragmentation begins to hurt performance when you exceed 90%. There are posts here from folks (with v2 systems, not ultra) who reported significant performance issues at somewhat lower values - approx. 85% if I recall correctly.

Though there are likely different opinions on this particular subject, my personal advice is to try to stay under 85% if you can.

Ah yes, good point. But fragmentation shouldn't be an issue in this instance. I have a group of files that will rarely be removed and were all copied in one large block. I should account for damaged sectors, however, which can happen over the course of time.

What's odd is that I did another copy. This time I ended up being able to copy a few less files. I'm glad because I hit the 98% mark and stopped the copies, without clearly hitting the barrier. I have no idea how the software may have copied those extra files and into what space. HD space on an NFS drive contains more information than on the share so a 4TB to 4TB plan isn't going to happen. I'll probably take just a couple of files off for buffer but what you've said is good advice for my main NAS, which will constantly have copying back and forth and a variable number. Many thanks and at least I've got this interesting issue solved.

I am also having the same issue. I have deleted multiple Snapshot but my free space stays the same. Any more ideas anybody? I also can't connect to \\READYNAS\admin\.purge -- so no luck there.

Help would be appreciated. Please and thank you.