Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!aplcen!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!mips!excelan!csibtfr!motcsd!hpda!hpcupt1!tsu From: tsu@hpcupt1.HP.COM (Stanley Tsu) Newsgroups: comp.sys.hp Subject: Re: HPUX 7.0: Was Re: HP Optical When??? Message-ID: <-286539972@hpcupt1.HP.COM> Date: 2 Jan 90 20:57:30 GMT References: <13002@cit-vax.Caltech.Edu> Organization: Hewlett Packard, Cupertino Lines: 51 I'd like to point out that there are two products being discussed here: CD-ROM and Magneto-Optical (MO). CD-ROM is, as Joseph Hohl pointed out, is essentially the same as audio CD-ROM. The online HP-UX documentation product is available in CD-ROM format. I believe this is the product that Harold Katz saw a demo of. On the other hand, MO is a removeable, read-write-able optical disk that offers large storage (650Mb). It's a new storage technology that neatly fits between fast but expensive online disks and cheap, large capacity but slow tape drives. HP offers 2 MO drives, Series 6300 Model 650/A and Model 20GB/A. The 650/A is like a floppy disk drive (one mechanism, one removeable disk) except it holds a lot more than a typical floppy. The 20GB/A can hold up to 32 optical disks, yielding 32x625Mb=20Gb capacity. For more information, contact your local sales rep. Wayne Schlitt asks about MO: > 1) do you have to physically remove the disc and flip it over to get, > or does it just act like two different discs? > > 2) how do you know which side is which? You don't have to flip it over and you don't have to know which side is which. You mount each side as a file system. Everything else is functionally transparent to the user. The driver takes care of all the details. > 3) is it possible to read cd-rom discs with the erasable optical > disc? No. > 4) if than answer to 3 is no, can you obtain the documentation > products on the optical discs? Your support personnel should have this information. If they don't, they should contact the Peripherals Sales Center. > 5) i have been considering getting one of these for backup purposes. > are they better than the dat tapes and/or the 8mm exabyte tapes for > this purpose? > > > thanks much for any info... > > -wayne > ---------- #include Stanley Tsu General Systems