BHUBER@ecla.usc.edu (01/20/89)
Now that GS/OS is out, one of the reported advantages is lifting the 32 MB hard disk limit. Two questions result from this statement: 1. Can a CMS 60 MB hard disk, currently configured as two 30 MB partitions, be reconfigured (with loss of data, of course) as a single 60 MB volume? 2. Can an Apple 20 MB SCSI hard disk and a CMS 60 MB SCSI hard disk both be serviced from a single SCSI controller card? If not, why not? If yes, does it matter which brand controller card (Apple's or CMS's)? Thanks in advance, Bud
gwyn@smoke.BRL.MIL (Doug Gwyn ) (01/21/89)
In article <[ECLA.USC.EDU]19-Jan-89.09:54:54.BHUBER> BHUBER@ecla.usc.edu writes: >Now that GS/OS is out, one of the reported advantages is lifting the 32 MB >hard disk limit. But that advantage won't be realized when you use the existing ProDOS file system, for which the 32MB limit is hard-wired into the format. GS/OS supports multiple file system types; another may well support larger sizes.
asd@mentor.cc.purdue.edu (Kareth) (01/21/89)
In article <9465@smoke.BRL.MIL> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes: >In article <[ECLA.USC.EDU]19-Jan-89.09:54:54.BHUBER> BHUBER@ecla.usc.edu writes: >>Now that GS/OS is out, one of the reported advantages is lifting the 32 MB >>hard disk limit. > >But that advantage won't be realized when you use the existing ProDOS >file system, for which the 32MB limit is hard-wired into the format. >GS/OS supports multiple file system types; another may well support >larger sizes. If a company was really smart they'd make a SCSI/RLL controller that could accept SCSI commands and convert it and use a RLL (IBM style) drive on the apple or maybe just an RLL drive and whip up a the drivers to take full use of GS/OS and then we could run out and buy 110MB drives for $695! (w/o fan, power and cabinent of course) Open-Apple recently had an issue on buying drives sans anything and building them so you could use em. If you try the RLL route tho, it costs as much as pre-built. Now if only somebody would recognize this little market nitch... kareth.
keith@Apple.COM (Keith Rollin) (01/21/89)
In article <[ECLA.USC.EDU]19-Jan-89.09:54:54.BHUBER> BHUBER@ecla.usc.edu writes: >Now that GS/OS is out, one of the reported advantages is lifting the 32 MB >hard disk limit. Two questions result from this statement: Well...yes and no. GS/OS is just the supervising OS, as it were. It relies on the existance of File System Translators to perform the mapping of blocks and files to the way they are laid out on the disk. Two such FSTs are ProDOS and High Sierra (for CD-ROMs). With this distinction in mind, then GS/OS supports up to 4 gigabyte volumes, but is limited by the still existing 32Meg limit of the ProDOS FST. >1. Can a CMS 60 MB hard disk, currently configured as two 30 MB partitions, >be reconfigured (with loss of data, of course) as a single 60 MB volume? Not if you want to use it for ProDOS storage. > >2. Can an Apple 20 MB SCSI hard disk and a CMS 60 MB SCSI hard disk both be >serviced from a single SCSI controller card? If not, why not? If yes, does >it matter which brand controller card (Apple's or CMS's)? > You should be able to if your CMS drive can run off of Apple's SCSI card with the Rev C ROM. I don't have any experience with those drives, and can't remember is they do. Keith Rollin --- Apple Computer, Inc. --- Developer Technical Support INTERNET: keith@apple.com UUCP: {decwrl, hoptoad, nsc, sun, amdahl}!apple!keith "You can do what you want to me, but leave my computer alone!"
STEIN@UCONNVM.BITNET (Alan Stein) (01/21/89)
>Now that GS/OS is out, one of the reported advantages is lifting the 32 MB >hard disk limit. Two questions result from this statement: > >1. Can a CMS 60 MB hard disk, currently configured as two 30 MB partitions, >be reconfigured (with loss of data, of course) as a single 60 MB volume? > Maybe CMS has suitable utilities, but I can't get ADU to use more than 40 Megs of my 46 Meg hard disk. Alan H. Stein Department of Mathematics The University of Connecticut at Waterbury 32 Hillside Avenue, Waterbury, CT 06710 (203) 757-1231 Internet: stein%uconnvm.bitnet@mitvma.mit.edu BITNET: STEIN@UCONNVM UUCP: {rutgers psuvax1 ucbvax & in Europe mcvax} !UCONNVM.BITNET!STEIN Compu$erve: 71545,1500 Genie: ah.stein
kamath@reed.UUCP (Sean Kamath) (01/24/89)
In article <936@mentor.cc.purdue.edu> asd@mentor.cc.purdue.edu (Kareth) writes: >If a company was really smart they'd make a SCSI/RLL controller that could >accept SCSI commands and convert it and use a RLL (IBM style) drive on the >apple or maybe just an RLL drive and whip up a the drivers to take full use of >GS/OS and then we could run out and buy 110MB drives for $695! (w/o fan, >power and cabinent of course) > >kareth. Well, they do, sort of. I think what you mean is a card in the apple that would follow the st506 interface format. Try Perline electronics. I don't recommend them. The best way to go for this stuff is with the Adaptec 4077 controller. It is a SCSI to st506 with RLL encoding converter. There is also the Adaptec 4000A (don't get the 4000, as it has bugs and is slow), which is a straight SCSI to st506 mfm converter. Unfortunately, almost *all* the literature (both electronic and paper) I've seen on this subject mentions that it costs way to much for the effort. However, when you do it right, it's a *lot* cheaper. Fer instance: I picked up a 20 meg st506 drive (cmi whatever, off an AT) for $10. Beat that! Or the 10Megger I got from a friend who got it free. You see, in the "real" world of computer nuts, these things happen. I got mine at a swap meet, I don't know where my friend got his from. It's all legal, the hardward comes out of computers. This same frined bought a tek4044 with *two meg of 120ns RAM in it!* for $80. From the retail store the company runs. Beat that! Undoubtably, if you go buy an st506 drive from a reputable dealer, and do it from scratch, it will end up being about $100 cheaper than just buying a sider or other drive. In any case, the reason I haven't finished with my homebrew is that I just got a 40 meg SCSI drive, which I will recieve as soon as the folks I'm getting it from get uTek with NFS up on their tek4317 and 4417's. Sigh. I still wait. Sean Kamath -- UUCP: {decvax allegra ucbcad ucbvax hplabs}!tektronix!reed!kamath CSNET: reed!kamath@Tektronix.CSNET || BITNET: kamath@reed.BITNET ARPA: kamath%reed.bitnet@cunyvm.cuny.edu US Snail: 3934 SE Boise, Portland, OR 97202-3126 (I hate 4 line .sigs!)