I have the same issue with our HP 500.
If I try to plot rasters at a large scale on large paper size, I will get a crash and lose the job or will only print part of the imagery, I was told highly compressed formats such as ECW jp2k, etc are susceptable to this. Adesk was aware of this issue in 2008. I know cause I spent hours attempting to work this one through.
The only thing you can do is hope for a fix in the next SP or plot to a dwf and then print from the dwf. Note with rasters your DWF files can get large!
All the best
Tim