Make the shifted start_sector is the mount partition identifier

app/controllers/disk_wizard_controller.rb

@@ -151,10 +151,10 @@ def process_disk
           # send start sector as to be able to know which partition to mount
           device = Device.find_with_unallocated(user_selections['disk'])
           @selected_disk = (device.partitions.select{|part| part.identifier == user_selections['identifier'] }).first
-          end_sector = @selected_disk.end_sector
+          start_sector = @selected_disk.start_sector
         end
 
-        para = {path: path, label: label, end_sector: end_sector}
+        para = {path: path, label: label, start_sector: start_sector}
         job_name = :mount_job
         jobs_queue.enqueue({job_name: job_name, job_para: para})
       end

app/models/device.rb

@@ -95,7 +95,7 @@ def full_format fstype, label = nil
 
   def create_partition(size = nil, type = Partition.PartitionType[:TYPE_PRIMARY])
     # Shift start sector if it is on the patition table size
-    new_start_sector = [self.megabyte_to_sectors(PARTITION_TABLE_SIZE_MB), size[:start_sector].to_i].max
+    new_start_sector = self.shift_start_sector(size[:start_sector])
     raise "cannot create a partition with negative size" if size[:end_sector].to_i < new_start_sector
 
     old_partitions = Device.find(self.path).partitions
@@ -137,10 +137,11 @@ def mount_job params_hash
     Device.progress = 60
     kname = @kname
     DebugLogger.info "|#{self.class.name}|>|#{__method__}|:New partition Label #{params_hash[:label]}"
-    unless params_hash[:end_sector].blank?
+    unless params_hash[:start_sector].blank?
       # mount new partition
      device =  Device.find_with_unallocated "/dev/#{self.kname}"
-     new_partition = device.partitions.select{|part| part.end_sector.to_i == params_hash[:end_sector].to_i}.first
+     new_start_sector = self.shift_start_sector(params_hash[:start_sector])
+     new_partition = device.partitions.select{|part| part.start_sector.to_i == new_start_sector.to_i}.first
     else
       new_partition = self.partitions.last
     end

lib/modules/operation.rb

@@ -6,10 +6,10 @@ module Operation
   GPT_EDGE = 2 * TERA_BYTE
 
   # Consider this space as small space
-  SMALL_UNALLOCATED_PARTITION = 3 * MEGA_BYTE
+  SMALL_UNALLOCATED_PARTITION = 2 * MEGA_BYTE
 
   # the space in MB that we let it to the partition table
-  PARTITION_TABLE_SIZE_MB = 2
+  PARTITION_TABLE_SIZE_MB = 1
 
   DRIVE_MOUNT_ROOT = "/var/hda/files/drives"
 
@@ -136,6 +136,11 @@ def path
     return DiskUtils.get_path self
   end
 
+  # Shift start sector if it is on the patition table size
+  def shift_start_sector start_sector
+     [self.megabyte_to_sectors(PARTITION_TABLE_SIZE_MB), start_sector.to_i].max
+  end
+
   # Reload the device/partition attribute from system.
   def reload
     dev_path = "/dev/#{self.kname}"
@@ -179,6 +184,5 @@ def find node
     def is_small_unallocated_partition partition
       return (partition.free_space and partition.size < SMALL_UNALLOCATED_PARTITION)
     end
-
   end
 end