I'm interested in the answer to this too.
So I found this.
Open:
Sun compatible CD-ROM drives
http://www.ebsinc.com/solaris/suncds.htm
or Open:
FAQ: CD-ROM Drives on Sun Hardware
http://www.aball.de/~wpv/sun/faq/cdrom.html
Then go to:
Q4) What drives have been shown to work?
Doth the people knowest iff a Sun CDROM FAQ
is a sufficient matching list for DEC (it says it's 512
byte block too)? Me gots ta get one a dem.
John A.
excuse my language
Unfortunatly, I don't have a spare, but FYI any
cdrom drive that supports a
512-byte block size (either jumperable or when requested by the host
system)
will boot Suns...