With the present driver, i don't think there's any way to make it use
the other platters. I've noticed some cd changer commands in v2 of the
atapi spec, but i haven't looked at in in detail. Since i don't have
access to one of these drives myself, i'm not likely to implement this
any time soon; however, i'd be happy to receive changes to support it
from someone who does have such a device.
sss