How can I test the HBA driver?

Hi. I'm a graduate student majoring in Computer Science.
I'm interested in writing driver drivers, especially SCSI driver driver. I modified HBA driver and compiled. but I don't know how to test it
To my thinking because HBA driver is automatically loaded when boot, I can't replace it with my driver. Is it right?
How can I test it ? Is kenel compiled with new driver???
Thank you in advance.

HBA driver is a loadable module and it is HBA-specific, i.e. it is written for a particular type of the controller hardware. It is not clear, if you have modified a driver for you boot device controller of some other HBA. Do not replace your original driver used for booting - you may not boot you system! You may add to your system the HBA for which your new driver is written and then debug it on a live system.
You will find a lot of information about driver development and debugging in the on-line manual "Writing Device Drivers" posted on http://soldc.sun.com/developer/support/driver/IO_kit/PCI.html web page.

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