file system structure excessively large and fragmented

hello

we're getting issues creating files , setting security on 1 of our servers, getting error "the requested operation not completed due file system limitation"

in event viewer>applications , services logs>microsoft>windows>ntfs>operational, have error:

log name:      microsoft-windows-ntfs/operational
source:        microsoft-windows-ntfs
date:          01/04/2015 23:01:48
event id:      139
task category: none
level:         warning
keywords:      (4)
user:          system
computer:      jps-sr-fs-02.jps.internal
description:
file system structure maintains security information on volume d: (\device\harddiskvolume4) has grown excessively large , fragmented.  the structure has reached 100%% of maximum fragmentation limit.  if structure continues grow , reaches limit, may not possible create new files on volume.  it recommended volume taken offline preventative maintenance.
event xml:
<event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <system>
    <provider name="microsoft-windows-ntfs" guid="{3ff37a1c-a68d-4d6e-8c9b-f79e8b16c482}" />
    <eventid>139</eventid>
    <version>0</version>
    <level>3</level>
    <task>0</task>
    <opcode>0</opcode>
    <keywords>0x4000000000000004</keywords>
    <timecreated systemtime="2015-04-01t22:01:48.784234400z" />
    <eventrecordid>12</eventrecordid>
    <correlation />
    <execution processid="4" threadid="6740" />
    <channel>microsoft-windows-ntfs/operational</channel>
    <computer>jps-sr-fs-02.jps.internal</computer>
    <security userid="s-1-5-18" />
  </system>
  <eventdata>
    <data name="drivename">d:</data>
    <data name="devicename">\device\harddiskvolume4</data>
    <data name="fragmentationlevel">100</data>
  </eventdata>
</event>

which assume why we're having issues.

however, can't find reference error on internet.

the drive in question fragmented , i'm running defrag suspect that's not going help. 'preventative maintenance' refers to? file needs defragging? can point contig defrag it?

thanks in advance

hello

sorry not replying sooner shortly after post disaster struck , lost security database, losing access drive completely. since we've been recovering it. think because tried various ways try defrag it, no avail. advice else error - don't try fix it. copy data off new volume. 

no idea why error cropped noone else seems have ever been affected - 1.5tb drive 2 million files on it. user areas 2000 odd kids, each area own security settings. volume had been in use 5 years - it's on san , it's been moved old server @ point. deduplication enabled on it.

anyway, say, we're recovering data on drive should solve initial problem.

Windows Server  >  Windows Server 2012 General