wrong information from host_diskpool_get_info

This is my EXTENT CONTROL:
00038 :REGIONS.
00039 *RegionId VolSer RegStart RegEnd Dev-Type Comments
00040 VM7926 VM7926 0001 END 3390-09
00041 VL7927 VL7927 0001 END 3390-09
00042 VL7928 VL7928 0001 END 3390-09
00043 VL7929 VL7929 0001 END 3390-09
00044 VL7908 VL7908 0001 END 3390-09
00045 VL7909 VL7909 0001 END 3390-09
00046 VL7910 VL7910 0001 END 3390-09
00047 VL7911 VL7911 0001 END 3390-09
00048 VL7912 VL7912 0001 END 3390-09
00049 VL7913 VL7913 0001 END 3390-09
00050 VL7914 VL7914 0001 END 3390-09
00051 VL7915 VL7915 0001 END 3390-09
00052 VL7916 VL7916 0001 END 3390-09
00053 VL7917 VL7917 0001 END 3390-09
00054 VL7918 VL7918 0001 END 3390-09
00055 :END.
00056 :GROUPS.
00057 *GroupName RegionList
00058 CLOUD VL7915 VL7916 VL7917
00059 CLOUD VL7927 VL7928 VL7929 VL7908 VL7909 VL7910 VL7911
00060 POOL1 VL7912 VL7913 VL7914
00061 VMPOOL VL7918

This is the result of "host_diskpool_get_info":

>>> sdk_client.send_request('host_diskpool_get_info')
{u'rs': 0, u'overallRC': 0, u'modID': None, u'rc': 0, u'output': {u'disk_available': 64, u'disk_total': 69, u'disk_used': 5}, u'errmsg': u''}

What does mean "disk_available' 64, disk_total 69 and disk_used 5?

Is there any function that would bring me the max_gap available and pool total size?

Thanks!