hdindo report - head matching

[drdoc]

which part of this info do I need to match for a good head swap?

Drive Parts Information
Ctrl Chip Vendor........................ : 0000
Ctrl Chip Rev........................... : 63A1
MicroP Vendor........................... : 0000
MicroP Rev.............................. : 63A1
Channel Chip Vendor..................... : 0009
Channel Chip Rev........................ : 0011
Preamp Vendor........................... : 0001
Preamp Rev.............................. : 0003
PowerIC Vendor.......................... : 0000
PowerIC Rev............................. : 001C