Disk Overview shows incorrect value

Install couchbase server 2.0.0r-388 on windows server 2008 R2 64bit
After the installation is completed, "Disk Overview" in Cluster Overview page shows negative number

http://10.1.1.170:8091/nodes/self

{

"availableStorage": {
"hdd": [

{ "path": "C:\\", "sizeKBytes": 62810108, "usagePercent": 24 }

]
},
"memoryQuota": 3276,
"storageTotals": {
"ram":

{ "usedByData": 6722200, "total": 4294500352, "quotaTotal": 3435134976, "used": 992399360 }

,
"hdd":

{ "usedByData": 3166287, "total": 0, "quotaTotal": 0, "used": 3166287, "free": 0 }

},
"storage": {
"ssd": [ ],
"hdd": [

{ "path": "../var/lib/couchdb", "index_path": "../var/lib/couchdb", "quotaMb": "none", "state": "ok" }

]
},
"systemStats":

{ "cpu_utilization_rate": 3.15, "swap_total": 8587059200, "swap_used": 878030848 }

,
"interestingStats":

{ "curr_items": 0, "curr_items_tot": 0, "vb_replica_curr_items": 0 }

,
"uptime": "6314",
"memoryTotal": 4294500352,
"memoryFree": 3302100992,
"mcdMemoryReserved": 3276,
"mcdMemoryAllocated": 3276,
"couchApiBase": "http://10.1.1.170:8092/",
"otpNode": "ns_1@10.1.1.170",
"otpCookie": "qdbckexcnoeyzujw",
"clusterMembership": "active",
"status": "healthy",
"thisNode": true,
"hostname": "10.1.1.170:8091",
"clusterCompatibility": 1,
"version": "2.0.0r-388-gf35126e-enterprise",
"os": "windows",
"ports":

{ "proxy": 11211, "direct": 11210 }

}