Have a similar report running too but havent gone that far. However, you could try using
tpconfig -d
it displays a correlation to the Drive Index number and the robot it resides in.
For example:
# tpconfig -d
Index DriveName DrivePath Type Shared Status
***** ********* ********** **** ****** ******
0 Drive00 /dev/ntape/tape0_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=1
1 Drive01 /dev/ntape/tape1_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=2
2 Drive02 /dev/ntape/tape2_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=3
3 Drive03 /dev/ntape/tape3_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=4
4 Drive04 /dev/ntape/tape4_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=5
5 Drive05 /dev/ntape/tape5_d1 dlt3 Yes UP
TLD(0) Definition DRIVE=6
6 Drive06 /dev/ntape/tape6_d1 dlt3 Yes DOWN
TLD(0) Definition DRIVE=7
7 Drive10 /dev/ntape/tape10_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=1
8 Drive11 /dev/ntape/tape11_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=2
9 Drive12 /dev/ntape/tape12_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=3
10 Drive13 /dev/ntape/tape13_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=4
11 Drive14 /dev/ntape/tape14_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=5
12 Drive15 /dev/ntape/tape15_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=6
13 Drive16 /dev/ntape/tape16_d1 dlt3 Yes UP
TLD(1) Definition DRIVE=7
Currently defined robotics are:
TLD(1) robotic path = /dev/changer/mc1,
volume database host = k8moss
TLD(0) robotic path = /dev/changer/mc0,
volume database host = k8moss
Hope this helps.