what is a UUID for a lun ..exactly

[marvin51796]

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

[marvin51796]

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.?

[Dennis Handly]

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

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

[likid0]

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

[Dennis Handly]

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

HP 3PAR: HP3PARInfo