STEIN@UCONNVM.BITNET (Alan Stein) (05/10/89)
Several people have responded to my inquiry about why I haven't been able to use more than 40 megs out of my 45 meg hard drive. Thanks. The answer seems to be that apparently GS/OS insists on a relatively round number of megs when it formats a hard drive. The low level format seems to leave between 41 and 42 megs out of the 45, and then the high level format rounds things off to 40 megs. I guess I can live with that. Someone else had a question about high capacity hard drives under Prodos 8. My understanding was that Prodos 8 will only recognize two SCSI devices per card. At 32 Megs apiece, that would mean that an uncustomized version of Prodos 8 will only use up to 64 Megs. Alan H. Stein | stein@uconnvm.bitnet Department of Mathematics | stein%uconnvm.bitnet@mitvma.mit.edu University of Connecticut | ...psuvax1!UCONNVM.BITNET!STEIN 32 Hillside Avenue | Waterbury, CT 06710 | Compu$erve 71545,1500 (203) 757-1231 | GEnie ah.stein
farrier@Apple.COM (Cary Farrier) (05/10/89)
In article <8905100033.aa06016@SMOKE.BRL.MIL> STEIN@UCONNVM.BITNET (Alan Stein) writes: > > Several people have responded to my inquiry about why I haven't been >able to use more than 40 megs out of my 45 meg hard drive. Thanks. > The answer seems to be that apparently GS/OS insists on a relatively >round number of megs when it formats a hard drive. The low level format >seems to leave between 41 and 42 megs out of the 45, and then the high >level format rounds things off to 40 megs. As I said in my post before, GS/OS is not the limitation. The limitation is inherent in the old ProDOS filing system. ProDOS can only format a volume up to 32Mb. Therefore if you want to use your entire drive, partition it. Cary Farrier
shawn@pnet51.cts.com (Shawn Stanley) (05/11/89)
farrier@Apple.COM (Cary Farrier) writes: >In article <8905100033.aa06016@SMOKE.BRL.MIL> STEIN@UCONNVM.BITNET (Alan Stein) writes: >> >> Several people have responded to my inquiry about why I haven't been >>able to use more than 40 megs out of my 45 meg hard drive. Thanks. >> The answer seems to be that apparently GS/OS insists on a relatively >>round number of megs when it formats a hard drive. The low level format >>seems to leave between 41 and 42 megs out of the 45, and then the high >>level format rounds things off to 40 megs. > > As I said in my post before, GS/OS is not the limitation. The > limitation is inherent in the old ProDOS filing system. ProDOS > can only format a volume up to 32Mb. Therefore if you want to use > your entire drive, partition it. Forgive me, but this just seems a little bizarre. On one hand, Alan says he can format his hard drive to 40 Mb. On the other hand, Cary says that's because ProDOS can only format a volume up to 32 Mb. You guys are 8 Mb apart in your discussion! One valid point is that no matter what ProDOS does with the volume when you go to use it, you should be able to do a low level format to the entire drive. As someone mentioned earlier, the unformatted and formatted drive space can be two totally different numbers, depending a lot on your controller and the formatting method it uses, etc. I rather think that's part of the answer here. UUCP: {uunet!rosevax, amdahl!bungia, chinet, killer}!orbit!pnet51!shawn INET: shawn@pnet51.cts.com