diff --git a/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Drive.json b/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Drive.json
index 08cb5519a49d..66248bd6bff5 100644
--- a/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Drive.json
+++ b/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Drive.json
@@ -140,64 +140,79 @@
       "properties": {
         "storageNode": {
           "description": "Node that the drive is physically connected.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "serialNumber": {
           "description": "Serial number of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "healthStatus": {
           "description": "Health status of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "operationalStatus": {
           "description": "Operational status of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "usage": {
           "description": "Intended usage of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "physicalLocation": {
           "description": "Indicate where the hardware is located.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "model": {
           "description": "Model of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "firmwareVersion": {
           "description": "The firmware version of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "isIndicationEnabled": {
           "description": "Indicate whether the drive's identification LEDs are active or not.",
-          "type": "boolean"
+          "type": "boolean",
+          "readOnly": true
         },
         "manufacturer": {
           "description": "The name of the drive's manufacturer.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "storagePool": {
           "description": "The storage pool where the drive is located.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "mediaType": {
           "description": "Media type of the drive.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "capacityGB": {
           "description": "Total capacity in GB of the drive.",
           "format": "int32",
-          "type": "integer"
+          "type": "integer",
+          "readOnly": true
         },
         "description": {
           "description": "Detailed description for HealthStatus/OperationalStatus. Empty if HealthStatus/OperationalStatus is Healthy/Ok.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "action": {
           "description": "Detailed recommended action for HealthStatus/OperationalStatus. Empty if HealthStatus/OperationalStatus is Healthy/Ok.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         }
       }
     },
diff --git a/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Volume.json b/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Volume.json
index 7e7e26561036..5b9034456929 100644
--- a/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Volume.json
+++ b/specification/azsadmin/resource-manager/fabric/Microsoft.Fabric.Admin/preview/2019-05-01/Volume.json
@@ -141,36 +141,44 @@
         "totalCapacityGB": {
           "description": "Total capacity in GB of the volume.",
           "format": "int32",
-          "type": "integer"
+          "type": "integer",
+          "readOnly": true
         },
         "remainingCapacityGB": {
           "description": "Remaining capacity in GB of the volume.",
           "format": "int32",
-          "type": "integer"
+          "type": "integer",
+          "readOnly": true
         },
         "healthStatus": {
           "description": "Health status of the volume.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "operationalStatus": {
           "description": "Operational status of the volume.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "repairStatus": {
           "description": "Repair status of the volume. Empty if no repair job running, something like 'Running, 90%' when repairing.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "description": {
           "description": "Detailed description for HealthStatus/OperationalStatus. Empty if HealthStatus/OperationalStatus is Healthy/Ok.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "action": {
           "description": "Detailed recommended action for HealthStatus/OperationalStatus. Empty if HealthStatus/OperationalStatus is Healthy/Ok.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "volumeLabel": {
           "description": "Volume label.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         }
       }
     },