To find the installed drivers try:
# lslpp -hac | grep device
This will give you a list of all the device driver filesets installed.

If you need to find the scsi adapter a device is connected to then you can do this with the lscfg command.

# lscfg -vl hdisk0
hdisk0 10-60-00-8,0 16 Bit SCSI Disk Drive (18200 MB)

Manufacturer................IBM
Machine Type and Model......DNES-318350W
FRU Number..................25L3100
ROS Level and ID............53414755
Serial Number...............AKG4H067
EC Level....................F42017
Part Number.................25L1860
Device Specific.(Z0)........000003029F00013A
Device Specific.(Z1)........25L2870
Device Specific.(Z2)........0933
Device Specific.(Z3)........00104
Device Specific.(Z4)........0001
Device Specific.(Z5)........22
Device Specific.(Z6)........F42036

The 10-60-00-8,0 bit is the disk address.

Then again use lscfg and look for the address.
The -00- is always -00- for scsi.
The -8,0 is the scsi address, 8 in this case.
The 10-60 is the scsi adapter.

So:
lscfg -vp |grep -p 10-60
You will get all sorts of output for all the devices on the same scsi bus but the bit I think you are after will look like this:

scsi0 10-60 Wide/Fast-20 SCSI I/O Controller

Device Specific.(YL)........P2/Z1

So the 10-60 adapter is scsi0
So hdisk0 is on scsi0.

HTH