On Monday 07 March 2005 18:53, Rick Stevens wrote: > CD-ROMs also use a 2048-byte sector size. AFAIK, only disks actually > use 512-byte sector sizes. Well, way back when, Sun used a 512-byte > sector size on CDs, too (Sun SPARC SLC, etc.). I never did figure out > why. Fortunately, I had some old NEC Multispin CD drives that could be > jumpered either way, so I put on a switch. 512 was needed for booting only - otherwise a regular CD drive would work as well.. That way they didn't have to mock around with the OBP and extending the firmware of a cdrom is quite easy... Peter.