Setting Boot and Mirror Disks correctly at the Solaris OBP

I am recovering a domain that was lost due to power outage on an Sun Fire E25K server. I know how to set the appropriate parameters at the openboot prompt using nvalias/devalias, boot etc.

However, I do not understand how one gets from the output of show-disks

{1a0} ok show-disks
a) /pci@1dd,600000/SUNW,qlc@1/fp@0,0/disk
b) /pci@1dd,700000/SUNW,qlc@1/fp@0,0/disk
c) /pci@1dc,700000/pci@1/pci@1/scsi@2,1/disk
d) /pci@1dc,700000/pci@1/pci@1/scsi@2/disk
e) /pci@1bd,600000/SUNW,qlc@1/fp@0,0/disk
f) /pci@1bd,700000/SUNW,qlc@1/fp@0,0/disk
g) /pci@1bc,700000/pci@1/pci@1/scsi@2,1/disk
h) /pci@1bc,700000/pci@1/pci@1/scsi@2/disk
q) NO SELECTION
Enter Selection, q to quit:

to the correct full disk path. I know it is basically one of the pci/scsi paths listed above, but in all instruction or examples a string of additional characters is appended to the path to specify Targets and Units but the explanation of the path construction is never given.

Could someone please explain how to construct this disk path correctly?