Synology NAS - move files from Shared Folder to iSCSI LUN then delete Shared Folder

Have a Synology DS1815 with (4) 10TB Disks and 1 Volume as shown:
SynologyVolume
I currently have a Shared Folder setup to store backups of some Server data as shown:
SynologyShare
What I'd like to do is:
> Create an iSCSI LUN, thin-provisioned, that would have a maximum size of all available space (about 26TB)
> Copy all the files from the Shared Folder to the new LUN
> Delete the Shared Folder

Since Volume 1 is currently using 8.8TB and has 17.38TB free, it seems like this should work fine. But, since I'm not all that familiar with how NAS storage works just want to make sure I'm not missing something...
Sal SoricePresidentAsked:
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ArneLoviusCommented:
That should work without any issues.
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Sal SoricePresidentAuthor Commented:
Thanks ArneLovius.

Curious... Once I remove the Shared Folder, does that make the entire Volume 1 available to the LUN?
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ArneLoviusCommented:
If the iSCSI LUN is thin provisioned, it will only take up space that is written to it, deleting data from the iSCSI LUN will usually NOT shrink the space used by the iSCSI LUN.

If there are no shares on the underlying volume, then there is nothing else taking up space on the underlying storage.

Different "NAS" devices handle iSCSI LUNS differently, some create a LVM/ZFS volume on the underlying disk/array, others create a file in the filesystem.
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Sal SoricePresidentAuthor Commented:
Thanks Arne.

Please advise if I'm understanding how this will work:
> I have 26TB of disk space on Volume 1
> There is a Shared Folder with 8TB of Data and 18TB of free space on Volume 1
> I create a thin-provisioned iSCSI LUN with a max size 26TB on Volume 1
> I copy the 8TB of data from the Shared Folder to the new LUN
> I delete the Shared Folder
> Now the iSCSI LUN on Volume 1can grow to the full 26TB maximum

Correct?
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ArneLoviusCommented:
to prevent over provisioning being an issue, I would create the iSCSI LUN to be smaller than your total storage, but apart from that I see no issues.
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Sal SoricePresidentAuthor Commented:
Thanks Arne! I selected my overview comment (no points) so anyone who reads the post can see what I will do along with your advice about my plan.
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