stripping floor to raw 3/4" plywood

current situation:
two story wood frame structure on slab on grade
lower story was garage and is being converted to living quarters
upper story is living quarters floor of upper story is 3/4" plywood with minor water damage near windows; damage will be repaired
floor had 3 different layers of linoleum-type tile on it, most of which is now removed, but some areas still have small pieces of up to all 3 layers of tile, other areas have large areas of glue or layered/split tile of the up to 3 layers
what is the best way to remove the remaining tile and level the floor? a stand up electric sander? if so, what specific kind?
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soften the adhesive and then scrape it off?
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An electric-powered tool can be rented at Home Depot to scrape the remaining tile from the floor. It's not a sander. Sorry, can't remember the name of it.
George Elkins

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