Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!amdcad!ames!pasteur!ucbvax!SDS.SDSC.EDU!jordan%lvvb.span From: jordan%lvvb.span@SDS.SDSC.EDU (RICH) Newsgroups: comp.sys.apple Subject: re: Message-ID: <880218180953.21c03755@Sds.Sdsc.Edu> Date: 18 Feb 88 18:09:53 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 48 > Since I'm currently in the market for a hard drive, some questions come up. > How fast, how large, and how much? But, to make this a reasonable question, > I'll narrow the focus somewhat at the moment. Do {any | some | all} of > the hard drives currently available for ProDos allow you to use more than > 32 Megabytes. While that's certainly sufficient for ProDos use, in fact, I'll > probably want to have 20 Megs for my PC Transporter which is stored in a ProDos > file to the rest of the world, though MS-DOS to the card. ... > Todd A. Bakal Todd, I only have immediate info on the CMS drive series. These come in 20, 40, 60 and 80 MBytes. The 60 Mbyte is split into two 32 MByte partitions which are given different volume names and are considered to be drives 1 and 2 in the particular slot. The two device/slot limit is currently inherent in Prodos, and is the reason most Apple ][ hard disks stop at 64 Mbytes. So you could use one partition primarily to hold your Messy-DOS pseudo disk and the other strictly for Prodos. The 80 Mbyte CMS uses two SCSI cards in two slots and provides four volumes (20, 20, 20, and 15Mbytes roughly) with two volumes mapped to each slot that has a card. Access times range from 65ms down to 29ms (I don't have the specific info here), but no transfer rates are given in their literature. The same drives can be used on a Mac, and most of them can be run as shared disks between two Apples, two Macs, or a combo. Note that Prodos-16 v2.0 (the _real_ prodos-16) has been rumored to eliminate both the two device per slot limit and the 32 MByte/volume limit. I don't have specific info on the PC Transporter, but unless AE supplies something that increases Prodos' 16 Mbyte file size limit, wouldn't that be the largest pseudo-disk you could create on a Prodos volume? Newer Siders are supposed to be similar, but I have no data on them. Apple disks have been having intermittent problems running some Prodos-16 applications like the finder. This from GENIE AART. A fix has been promised but apparently not yet delivered. Rich Richard Jordan SAIC Las Vegas DISCLAIMER: The stuff said above is my own stuff, not necessarily SAIC's stuff or the U.S. Government's stuff.