Powerpath pseudo devices question

I am usingPowerpath 5.2 on Solaris 10. After doing 'powermt config' , the pseudo devices for my new luns appear on 'forma't like this:

52. emcpower0g
          /pseudo/emcp@0
53. emcpower 1c
          /pseudo/emcp@1
54. emcpower 2a
          /pseudo/emcp@2

My question is how does powerpath pick which slice to use like 0g, 1c or 2a as above?  I normally put all my clariion luns on slice 7 as below.

partition> p
Current partition table (original):
Total disk cylinders available: 32766 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0 unassigned    wm       0                0         (0/0/0)          0
  1 unassigned    wu       0                0         (0/0/0)          0
  2     backup    wu       0 - 32765      255.98MB    (32766/0/0) 524256
  3 unassigned    wm       0                0         (0/0/0)          0
  4 unassigned    wm       0                0         (0/0/0)          0
  5 unassigned    wm       0                0         (0/0/0)          0
  6 unassigned    wm       0                0         (0/0/0)          0
  7 unassigned    wm       0 - 32764      255.98MB    (32765/0/0) 524240

partition>

BUT on powermt display, they all show as 'a':

Pseudo name=emcpower0a
CLARiiON ID=APM00043600813 [DB01]
Logical device ID=600601609BB81000D526026545EEDE11 [LUN 77]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 1

Pseudo name=emcpower1a
CLARiiON ID=APM00043600813 [DB01]
Logical device ID=600601609BB81000D426026545EEDE11 [LUN 76]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 1

Pseudo name=emcpower2a
CLARiiON ID=APM00043600813 [DB01]
Logical device ID=600601609BB81000D326026545EEDE11 [LUN 73]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A       Array failover mode: 1

is what we see on 'format' just a reference to the disk?  because not all the luns are the same, some are a , c , g...etc. These LUNS will be used for oracle ASM. In the past, I have used this and all showed up as 'a' on 'format' and 'powermt display'. This is the first time I see all of them different on the format output.

Thank you in advance.