cancel
Showing results for 
Search instead for 
Did you mean: 

Vdisk and LUN

 
SOLVED
Go to solution
P Arumugavel
Respected Contributor

Vdisk and LUN

Hi Gurus, I m a novice on this topic. Pls help.
What is the difference between Vdisk and LUN? How will come to know that which physical disks are presents in a perticular LUN?
6 REPLIES 6
Suraj K Sankari
Honored Contributor

Re: Vdisk and LUN

SoorajCleris
Honored Contributor
Solution

Re: Vdisk and LUN

Hi ,

vdisk is a term used for LUN in EVA.

LUN - is a storage volume which is presented to any OS from any storage.

LUN = logical unit Number.


When we check from OS side, the assigned LUNS will show as physical volumes connected to the server.

If you want to see which disk is part of which LUN, you need to have storage access. A storage administrator can tell that. Normally the LUN will be a RAID volume which is created with a number of disks.

If you are using EVA, from CM EVA you can see that.

Regards,
Sooraj
"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity" - Dennis Ritchie
P Arumugavel
Respected Contributor

Re: Vdisk and LUN

OK. Thanks... What is wwid?
Suraj K Sankari
Honored Contributor

Re: Vdisk and LUN

Hi,
>>What is wwid?

Is it means WWN no?

Suraj
P Arumugavel
Respected Contributor

Re: Vdisk and LUN

Yes, WWN...
P Muralidhar Kini
Honored Contributor

Re: Vdisk and LUN

Hi,

WWN -> World Wide Name
WWID -> World Wide Identifier

These are nothing but a unique ID's associated with your FC/SAS... targets.

Each WWN is an 8-byte number derived from an IEEE OUI (for the first 3 bytes)
and vendor-supplied information. The 64-bit address assigned to a Host
Adapter Bus (HBA) in a Fibre Channel network. Assigned by the vendor at the
time of manufacture, it is similar to the MAC address in an Ethernet network.

Related Links -
http://en.wikipedia.org/wiki/World_Wide_Name
http://www.topbits.com/world-wide-name-wwn.html

Hope this helps.

Regards,
Murali
Let There Be Rock - AC/DC