Error running a command to remove snapshots (issue resolved

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Brief description of the problem###

I went to delete my snapshot but am unable to

Detailed step by step instructions to reproduce the problem

[write here]

Web-UI screenshot

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Error Traceback provided on the Web-UI

Traceback (most recent call last): File "/opt/rockstor/src/rockstor/rest_framework_custom/generic_view.py", line 41, in _handle_exception yield File "/opt/rockstor/src/rockstor/storageadmin/views/snapshot.py", line 223, in delete self._delete_snapshot(request, sname, snap_name=snap_name) File "/opt/rockstor/eggs/Django-1.8.16-py2.7.egg/django/utils/decorators.py", line 145, in inner return func(*args, **kwargs) File "/opt/rockstor/src/rockstor/storageadmin/views/snapshot.py", line 208, in _delete_snapshot remove_snap(share.pool, sname, snapshot.name) File "/opt/rockstor/src/rockstor/fs/btrfs.py", line 589, in remove_snap log=True) File "/opt/rockstor/src/rockstor/system/osi.py", line 115, in run_command raise CommandException(cmd, out, err, rc) CommandException: Error running a command. cmd = /sbin/btrfs subvolume delete /mnt2/BlackfangNas/Rockons/btrfs/subvolumes/a50da6009cbe49a8eb22a029b1072c5fffb593ebed6a18d8f755242102f2e982. rc = 1. stdout = ["Delete subvolume (no-commit): '/mnt2/BlackfangNas/Rockons/btrfs/subvolumes/a50da6009cbe49a8eb22a029b1072c5fffb593ebed6a18d8f755242102f2e982'", '']. stderr = ["ERROR: cannot delete '/mnt2/BlackfangNas/Rockons/btrfs/subvolumes/a50da6009cbe49a8eb22a029b1072c5fffb593ebed6a18d8f755242102f2e982': Read-only file system", '']

###UPDATE###
I did a hardware power down and reboot and it looks like that this fixed the issue.

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