asm disk quesiton

1. i use kfod command to find disk

such as

kfod asm_diskstring='/dev/r*' disks=all

--------------------------------------------------------------------------------
 Disk          Size Path                                     User     Group  
================================================================================
   1:      10368 Mb /dev/r11g_asmdisk1                       oracle   oinstall
   2:       1280 Mb /dev/r11g_asmdisk10                      oracle   oinstall
   3:       1280 Mb /dev/r11g_asmdisk11                      oracle   oinstall
   4:      10368 Mb /dev/r11g_asmdisk2                       oracle   oinstall
   5:      10368 Mb /dev/r11g_asmdisk3                       oracle   oinstall
   6:      10368 Mb /dev/r11g_asmdisk4                       oracle   oinstall
   7:       2304 Mb /dev/r11g_asmdisk5                       oracle   oinstall
   8:       2304 Mb /dev/r11g_asmdisk6                       oracle   oinstall
   9:       4224 Mb /dev/r11g_asmdisk7                       oracle   oinstall
  10:       4224 Mb /dev/r11g_asmdisk8                       oracle   oinstall
  11:       1280 Mb /dev/r11g_asmdisk9                       oracle   oinstall