diff --git a/azurelinuxagent/common/osutil/freebsd.py b/azurelinuxagent/common/osutil/freebsd.py
index ddf8db6..b4bbd28 100644
--- a/azurelinuxagent/common/osutil/freebsd.py
+++ b/azurelinuxagent/common/osutil/freebsd.py
@@ -22,7 +22,7 @@ import azurelinuxagent.common.utils.textutil as textutil
 import azurelinuxagent.common.logger as logger
 from azurelinuxagent.common.exception import OSUtilError
 from azurelinuxagent.common.osutil.default import DefaultOSUtil
-
+from azurelinuxagent.common.future import ustr
 
 class FreeBSDOSUtil(DefaultOSUtil):
     def __init__(self):
@@ -196,3 +196,50 @@ class FreeBSDOSUtil(DefaultOSUtil):
         logger.verbose("Interface info: ({0},{1},{2})", iface, inet, mac)
 
         return iface, inet, mac
+
+    def device_for_ide_port(self, port_id):
+        """
+        Return device name attached to ide port 'n'.
+        """
+        if port_id > 3:
+            return None
+        g0 = "00000000"
+        if port_id > 1:
+            g0 = "00000001"
+            port_id = port_id - 2
+        err, output = shellutil.run_get_output('sysctl dev.storvsc | grep pnpinfo | grep deviceid=')
+        if err:
+            return None
+        g1 = "000" + ustr(port_id)
+        g0g1 = "{0}-{1}".format(g0, g1)
+        """
+        search 'X' from 'dev.storvsc.X.%pnpinfo: classid=32412632-86cb-44a2-9b5c-50d1417354f5 deviceid=00000000-0001-8899-0000-000000000000'
+        """
+        cmd_search_ide = "sysctl dev.storvsc | grep pnpinfo | grep deviceid={0}".format(g0g1)
+        err, output = shellutil.run_get_output(cmd_search_ide)
+        if err:
+            return None
+        cmd_extract_id = cmd_search_ide + "|awk -F . '{print $3}'"
+        err, output = shellutil.run_get_output(cmd_extract_id)
+        """
+        try to search 'blkvscX' and 'storvscX' to find device name
+        """
+        output = output.rstrip()
+        cmd_search_blkvsc = "camcontrol devlist -b | grep blkvsc{0} | awk '{{print $1}}'".format(output)
+        err, output = shellutil.run_get_output(cmd_search_blkvsc)
+        if err == 0:
+            output = output.rstrip()
+            cmd_search_dev="camcontrol devlist | grep {0} | awk -F \( '{{print $2}}'|awk -F , '{{print $1}}'".format(output)
+            err, output = shellutil.run_get_output(cmd_search_dev)
+            if err == 0:
+                return output.rstrip()
+
+        cmd_search_storvsc = "camcontrol devlist -b | grep storvsc{0} | awk '{{print $1}}'".format(output)
+        err, output = shellutil.run_get_output(cmd_search_storvsc)
+        if err == 0:
+            output = output.rstrip()
+            cmd_search_dev="camcontrol devlist | grep {0} | awk -F \( '{{print $2}}'|awk -F , '{{print $1}}'".format(output)
+            err, output = shellutil.run_get_output(cmd_search_dev)
+            if err == 0:
+                return output.rstrip()
+        return None
diff --git a/azurelinuxagent/daemon/resourcedisk/freebsd.py b/azurelinuxagent/daemon/resourcedisk/freebsd.py
index 36a3ac9..4ca0058 100644
--- a/azurelinuxagent/daemon/resourcedisk/freebsd.py
+++ b/azurelinuxagent/daemon/resourcedisk/freebsd.py
@@ -57,19 +57,24 @@ class FreeBSDResourceDiskHandler(ResourceDiskHandler):
             raise ResourceDiskError("Unable to detect resource disk device:{0}".format(output))
         disks = self.parse_gpart_list(output)
 
-        err, output = shellutil.run_get_output('camcontrol periphlist 2:1:0')
-        if err:
-            raise ResourceDiskError("Unable to detect resource disk device:{0}".format(output))
+        device = self.osutil.device_for_ide_port(1)
+        if device is None:
+        # fallback logic to find device
+            err, output = shellutil.run_get_output('camcontrol periphlist 2:1:0')
+            if err:
+                # try again on "3:1:0"
+                err, output = shellutil.run_get_output('camcontrol periphlist 3:1:0')
+                if err:
+                    raise ResourceDiskError("Unable to detect resource disk device:{0}".format(output))
 
         # 'da1:  generation: 4 index: 1 status: MORE\npass2:  generation: 4 index: 2 status: LAST\n'
-        device = None
-        for line in output.split('\n'):
-            index = line.find(':')
-            if index > 0:
-                geom_name = line[:index]
-                if geom_name in disks:
-                    device = geom_name
-                    break
+            for line in output.split('\n'):
+                index = line.find(':')
+                if index > 0:
+                    geom_name = line[:index]
+                    if geom_name in disks:
+                        device = geom_name
+                        break
 
         if not device:
             raise ResourceDiskError("Unable to detect resource disk device.")