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- .a js=y nm=1 bo=53
- .sf3,11,1 .sh3,11,1 .std3,14,2
- .t35 Dis - .zl
- About The Clarkson Z-248 Computer Disk Drives .jc
- About The Clarkson Z-248 Computer Disk Drives .hc
- .st3,11,2
- A Galahad "How To" Series Article .jc
-
- &dOverview .jc
- .i10 .a ll=68
- This article describes the two different types of disk drives in the
- Clarkson Z-248 computer.
- .i .a ll=d
-
- &dZ-248%Disk%Drives .jc
-
- The Clarkson version of the Z-248 has two different type of disk drives.
- One is the standard 320/360K (kilobyte) drive. This is drive A: in the center
- of the computer, really the left hand drive. The right hand drive is drive B:
- which is a 1.2M (megabyte) drive. It holds four times as much data as the 360K
- drive.
-
- Each drive requires a different type 5 1/4 inch diskette. One is called
- 'double density', used in 360K drives; the other is called 'high density' or
- 'high capacity". You can tell the difference between the two type of diskettes
- by the 'hub ring'. The double density diskette has a hub ring in the center of
- the diskette. It is an extra piece of plastic attached around the center hole.
- The high density diskette does &inot have a hub ring. You should &onever use
- the wrong type diskette in a drive. It will not hurt the drive, but you might
- lose data.
-
- The fact that these drives are different is both good and bad.
-
- &dGood%features:
- .i3
- The 1.2M drive will hold so much data that language processor software and
- libraries, such as Fortran, Pascal, and C can all be placed on one diskette.
- This saves a lot of problems with multiple diskettes when using theses
- processors.
-
- The 1.2M drive is faster, speeding up compiles and linking, and information
- retrieval.
-
- The cost of a 1.2M diskette is less than four times that of a 360K diskette.
-
- If you ever get a hard disk, 1.2M is almost essential to do a backup of the
- hard disk onto floppy diskettes.
-
-
- .u &dBad%features:
-
- You cannot copy an entire 1.2M diskette to another standard diskette. You must
- copy it in parts to four 360K diskettes. You can copy it to another 1.2M
- diskette using the command: DISKCOPY B:*.* B:*.* You will have to exchange
- the diskettes. It is a slow process, but it does copy.
-
- The 1.2M disk drive is very smart (too smart). If you put a diskette formatted
- in drive A: (360K) in it, it will read it. &oAND%it%will%also%write%to%it. If
- you write to a 360K diskette in drive B: you may not be able to read the
- diskette in drive A:. This is because of the physical makeup of the 1.2M
- drive.
- .i
-
- &dGeneral%Rules:
- .i8
- .u3 1.%To copy two 360K diskettes: Copy from B: to A: &dNEVER copy A: to B:.
-
- .u3 2.%Format only Double-Sided Double-Density (360K) diskettes in drive A:
-
- .u3 3.%Format only High Density (1.2M) diskettes in drive B:
-
- .u3 4.%Never save data to a 360K diskette in drive B: - but you may read a 360K
- diskette in drive B:.
- .i