scoile@gmuvax2.gmu.edu (Steve Coile) (02/13/91)
What is the maximum number of hard drives that can be chained together
on a 1040ST (TOS 1.0)? Is there any problem with having different sized
hard drives (e.g. 2 20meg and a 30meg)? Is there a ceiling on the
amount of disk space TOS will recognize? Is the number of partitions
limited only by the number of letters in the alphabet, or is there a TOS
limit on the total number of HD partitions?
Steve "Stevers!" Coile
{scoile|acs075}@gmuvax[{.BITNET|[2].gmu.edu}]|2211c1@gmuvax2.gmu.edu
"Maturity is knowing when and where to act immature"hojo@cbnewsb.cb.att.com (HC Johnson) (02/14/91)
> What is the maximum number of hard drives that can be chained together > on a 1040ST (TOS 1.0)? Is there any problem with having different sized > hard drives (e.g. 2 20meg and a 30meg)? Is there a ceiling on the > amount of disk space TOS will recognize? Is the number of partitions > limited only by the number of letters in the alphabet, or is there a TOS > limit on the total number of HD partitions? > > Steve "Stevers!" Coile > {scoile|acs075}@gmuvax[{.BITNET|[2].gmu.edu}]|2211c1@gmuvax2.gmu.edu > "Maturity is knowing when and where to act immature" > > The TOS limit: 16 devices, of which 2 are the floppy drives. This leaves 14 HD partitions which can be active at one time. The 1040ST limit: At most 7 SCSI devices. Most of these support 2 Hard Drives, some 8. Subtract 1 SCSI device for the (usual) clock, and you get 6, giving 12 to 48 drives maximum. The Atari Hard disk driver, AHDI, only supports 1 HD on each SCSI device. Thus TOS will access disk like devices as letters C thru P. Howard Johnson ATT BELL LABS att!lzsc!hcj hcj@lzsc.att.com
ljdickey@watmath.waterloo.edu (L.J.Dickey) (02/15/91)
In article <1991Feb13.183757.9927@cbfsb.att.com> hojo@cbnewsb.cb.att.com (HC Johnson) writes: >> What is the maximum number of hard drives that can be chained together >> on a 1040ST (TOS 1.0)? Is there any problem with having different sized >> hard drives (e.g. 2 20meg and a 30meg)? Is there a ceiling on the >> amount of disk space TOS will recognize? Is the number of partitions >> limited only by the number of letters in the alphabet, or is there a TOS >> limit on the total number of HD partitions? >> >> Steve "Stevers!" Coile >The TOS limit: 16 devices, of which 2 are the floppy drives. >This leaves 14 HD partitions which can be active at one time. > >The 1040ST limit: At most 7 SCSI devices. Most of these support >2 Hard Drives, some 8. Subtract 1 SCSI device for the (usual) clock, >and you get 6, giving 12 to 48 drives maximum. > >The Atari Hard disk driver, AHDI, only supports 1 HD on each SCSI device. > >Thus TOS will access disk like devices as letters C thru P. Thanks, Howard. I would like to add that there is another limit: the size of each partition. On early systems, 16 Megabytes per partition.