I just created a 4 component strippedmetaLUN using LUNs 300, 301, 302 and 303. I expanded using LUN 303. This is the results of the naviseccli metalun -list command (minus extra stuff). It takes the meta base LUN (303) and renumbers the LUN Number to 24530 - the Number is the important part  - LUN Name can be anything. It then takes the next component LUN, re-numbers the Number to 24531 (component 302) and so on (301, then 300). So the lowest "MetaLUN Number" is the metaLUN base LUN.  MetaLUN Number:  303 MetaLUN Name:  LUN 303 Element Size Multiplier:  4 Components: Number of LUNs:  4 LUNs: LUN Number:  24530 LUN Name:  LUN 303  <---- this is the meta base LUN - note that the LUN number above is 24530 - this is the lowest number of the four component LUNs. LUN WWN:  60:06:01:60:8B:C9:22:00:06:D6:89:4D:2D:28:E1:11 RAID Type:  RAID5 LUN Number:  24537 LUN Name:  LUN 300 LUN WWN:  60:06:01:60:8B:C9:22:00:D4:66:8E:E5:2C:28:E1:11 RAID Type:  RAID5 LUN Number:  24535 LUN Name:  LUN 301 LUN WWN:  60:06:01:60:8B:C9:22:00:3A:4B:3E:04:2D:28:E1:11 RAID Type:  RAID5 LUN Number:  24531 LUN Name:  LUN 302 - this is the second component LUN - note that its new LUN Number is 24531 (line above) LUN WWN:  60:06:01:60:8B:C9:22:00:E8:59:57:10:2D:28:E1:11 RAID Type:  RAID5  glen
What is the best way to find the base lun of a meta lun?  I originally thought it was the lun with the lowest id, but migrations screw that theory up.
Metalun base identification