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what is a UUID for a lun ..exactly

Regular Advisor

what is a UUID for a lun ..exactly

can someone please explain exactly what a UUID is for a LUN, and is it the same as WWID for a LUN?
thanks

 

hpux 11vi3 patched march 2013- 3par SAN

4 REPLIES
Regular Advisor

Re: what is a UUID for a lun ..exactly

i also should add how do you find a UUID for a lun , and what exactly does UUID stand for or what is its definition.?
Highlighted
Acclaimed Contributor

Re: what is a UUID for a LUN?

>what exactly does UUID stand for or what is its definition?

 

http://en.wikipedia.org/wiki/Universally_unique_identifier

Honored Contributor

Re: what is a UUID for a lun ..exactly

You normally get 3rd party tools from the vendor, that make life easier listing the UIDs of the disks.

 

For example:

 

HP eva: evainfo

HP xp: xpinfo

IBM DS: querysn

EMC: inq

 

You can allways try with scsimgr, for example in a symmetrix you get the lun uid with:

 

# scsimgr get_attr -D /dev/rdisk/disk30 -a serial_number

 

But with and eva or clariion You get the SN of the controller, you need to use the wwid:

 

scsimgr get_attr -D /dev/rdisk/disk10 -a wwid
Windows?, no thanks
Acclaimed Contributor

Re: what is a UUID for a lun ..exactly

>You normally get 3rd party tools from the vendor, that make life easier listing the UIDs of the disks.

 

HP 3PAR: HP3PARInfo