REFS, lost hard disk space after Windows defragmentation

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hi,

first short information server.

windows server 2012 datacenter

os disk = 60 gb ssd

physical raid controller: areca arc-1261
raid  = level 6
used disks = 11 x 2tb + 1 hot spare
file system = refs

usable space = 16,3 tb
real used space (what tools , folder properties counted) = 14,0 tb
used space (what see in computer overview) = 15,4 tb
unknown space see disk scan tool (or tools calculated) = 1,4 tb

so here see i've got "little" problem wasted/unknown space....


how problem originated:

the system drive ssd, after running server 150 days , unnecessary little windows problems remembered garbage collector ssd (trim).
wanted schedule "defragment , optimize drives" automatic job cleaning drive.
problem was, couldn't deselect big raid volume, gave try scheduled weekly optimization.
next day got alerts "low disk space warnings", i've lost 1 tb of disk space not explain how lost amount of space.
after starting resizing of raid, counted file property real used space , not explain shown size in overview.

what i've tried fix problem:
first of all, lot of google....

shadow copy: checked, cleaned, disabled = nothing few gb.
backup: checked, cleaned, disabled = nothing, ran under disk but... never know what's wrong
folder options: enabled far see system protected files , default hidden
safe boot = tried safe boot (some solutions different user in web) = nothing not see more or less
o & o defrag (latest server edition) = didn't support refs

last of it, new clean installation of windows

my questions:

is defragmentation on refs possible/useful or bug  "defragment , optimize drives" tool?

information's fixing troubles on refs or commands on ps oder cmd? (could not find on google)
i've got books ws2012 , e-books there no helpful information's refs.

i know big text block, wanted show detailed problem , attempts solve problem. 

 i hope me or show me new ways solve problem.

tanks in future....!



 

hi,

please perform chkdsk in cmd see used disk space. i'm thinking if tool display correct used disk space default part of folders not counted not have permission to.

for example folder system volume information (a hidden folder) not counted. volume shadow copy stored in folder grow up. not able displayed in used space when choose properties of drive. 

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Windows Server  >  Windows Server 2012 General



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