Johnny Zhang
You always want to know more about your servers, your network settings your storage options. "esxcfg-info" is the best place to dig things up. You want to know more about your storage? Type:
"esxcfg-info -s | less -RS"
You can check your VMFS alignment here, when the Starting sector set as 128 you know your VMFS is aligned correctly (VMFS aligned on 64KB boundary)
You can map the LUN back to your service console device. It will also show you the type of the file system on the LUN. In this case fb is VMFS
Johnny Zhang
There are times we want to find out what drivers are configured to load up when VMkernel boots up.
You can find this out by typing:
"esxcfg-modele -q"
You can also check what drivers are currently loaded:
" esxcfg-modele -l"
Johnny Zhang
Every time when you create a VMFS datastore, a copy of VMFS metadata will write to your LUN with following information:
  • Block size
  • Number of extents
  • Volume capacity
  • VMFS version
  • Label
You can use "vmkfstools -P -h /vmfs/volumes/LUN_Lable" to query the file system information

Note: information based on Infrastructure 3 DSA Manual