Page 10 - http://www.apple2.org

(C)1991-98 By Tony Diaz

The Apple ][ Information Resource @ http://www.apple2.org

Blank Media 5.25" & 3.5" Disks

The capacities, and usage of each type of disk is outlined below

Disk Size & Type

(Capacity)

Drives That Support this type

Disk ][, DuoDisk, Disk //c, UniDisk 5.25" AppleDisk 5.25",& Other 5.25" Drives

Apple External 400K Drive on UDC / Laser 128 AppleDisk 3.5", UniDisk 3.5", AE 3.5" Drive AMR & Laser 3.5" Drive

Apple FDHDSuperDrive, AE 3.5" HD Drive

Any Apple //e or IIgs with an FDHD attached or older Mac that has been upgraded with a SWIM chip & ROM set.

5.25"SSDD143K DSDD Can be used.

3.5"SSDD 3.5"DSDD

400K 800K

3.5"DSHD

1.44K

Apple Computers use 3 different types of disks. The most common for each machine is:

Computer

Apple ][+
Apple //e
Apple //c
Apple //c+
Apple IIgs
Apple IIgs w/SuperDrive Apple IIgs w/AE HD 3.5"

Disk Type

5.25" DSDD
5.25" or 3.5" DSDD 5.25" or 3.5" DSDD 3.5" or 5.25" DSDD 3.5" DSDD
3.5" DSDD or DSHD 3.5" DSDD or DSHD

(3.5 in some cases) (3.5" 800K)
(3.5" 800K)
(3.5" 800K)
(5.25" for //e Programs) (Apple FDHD)
(1.6 Meg AE format)

DSHD (High Density) Disks SHOULD NOT BE SUBSTITUTED for DSDD (Double Density) Disks. In simple terms, the density (amount of) magnetic particles on the disk per inch is different for the two disks. That means that the disks are not 'optimized' for other than the format they were designed. While they may work, you can loose data, and most likely, WILL loose data over time. The proper disks can be found. You may have to mail order them, but they can be found.

Page 10 - http://www.apple2.org

(C)1991-98 By Tony Diaz