Looks like a bug in the 7300 disk driver

[Karl Fox]

Come on, folks!  If you provide a 4-byte buffer to read, it is a BUG to
write 512 bytes to it!  Sure, the raw disk device has size limitations,
but it should never round up.  The driver should probably return EINVAL
if the size isn't a multiple of 512.
-- 
Karl Fox, Morning Star Technologies
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Internet: osu-cis!mstar!karl at tut.cis.ohio-state.edu