Ad-7170s/sf-ds10hg

I harvested an LD from a Sony Optiarc AD-7170S and need some help locating some specs. It was attached to an SF-DS10HG sled which I can find all over the NET for sale through places like Alibaba but no numbers. The existing driver is a 58812 once produced by Intersil and they don't publically publish datasheets. The 58831 is supposedly the replacement and has three write channels (235mA, 170mA, 100mA) but without the datasheet, it's kinda difficult to figure out which one is used.

Is there anyone that can provide some insight?:thinking:

Thanks for the help!