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tape drive and WWN

Created: 11 Feb 2013 • Updated: 12 Feb 2013 | 8 comments
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Hi ALL,

Do the tape drives have WWN on them?

My media server has a HBA card.That HBA has a WWN number which is zoned at switch with the cables coming from EACH DRIVE.

On switch media server WWN number is zoned with drives ______?

Drive also have a wwn number?

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mph999's picture

Yes, it is a unique hardware identifier. However, some libraries allocate the WWN to the slot the drives fit into. This is neat, as it means when a drive is replaced, the WWN does not change and therefore no zoning change is required. I guess in this case, the library 'over-rides the WWN on the drive.

Martin

 

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Marianne's picture

Any particular reason why you are repeating the exact same questions?

Please read through this entire discussion:
 https://www-secure.symantec.com/connect/forums/tape-drives-sso

and https://www-secure.symantec.com/connect/forums/robot-parts

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
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Arun K's picture

@ Martin:Then what is the difference between DDrive Serial number and Drive WWN?

Marianne's picture

Answered in your previous post:

https://www-secure.symantec.com/connect/forums/tape-drives-sso#comment-7783491 

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Arun K's picture

 

Difference between serial number and WWN?
NBU uses serial number to determine unique device and map to different media servers. (See SSO manual)
WWN is used by your SAN admin for zoning.

 

Please provide the OS commands to see the WWN of my tape drive?

Marianne's picture

Extract from my answer in your previous post:

What is the WWN here for tape drives?
Device Inquiry string does not display WWN. As you can see - the field is empty.
SAN Administrators will use third-party tools to see WWN.

 

Which part of the above is unclear?

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Arun K's picture

Are there any OS commands to see WWN of tape  drives attached to my media server.?

Marianne's picture

No.

As explained in your previous post - the WWN is part of the interface card, not part of the Device Inquiry string that is reported by OS and NBU commands.

I have suggested on 3 October 2012 that you ask your SAN administrator for quick overview of your environment. Have you done this yet?

We have also pointed you to various resources on the web - have you tried to use any of the links? Or Google? Or Wikipedia?

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

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