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2 Hard disk drives. 3 Optical drives. 4 Other drives. Toggle the table of contents. ... Apple MacBook Air SuperDrive; Other drives. Apple Tape Backup 40SC; Fusion Drive
The Macintosh Hard Disk 20 is the first hard drive developed by Apple Computer specifically for use with the Macintosh 512K.Introduced on September 17, 1985, it was part of Apple's solution toward completing the Macintosh Office (a suite of integrated business hardware & software) announced in January 1985.
The Macintosh can only support one external drive, limiting the number of floppy disks mounted at once to two, but both Apple and third party manufacturers developed external hard drives that connected to the Mac's floppy disk port, which had pass-through ports to accommodate daisy-chaining the external disk drive. Apple's Hard Disk 20 can ...
A stock Mac 128K with the original 64K ROM is incompatible with either Apple's external 800 KB drive with the Hierarchical File System or Apple's Hard Disk 20. A Mac 128K that has been upgraded with the newer 128 KB ROM (called a Macintosh 128Ke) can use internal and external 800 KB drives with HFS, as well as the HD20.
The 20SC originally contained a half height 5.25" Seagate ST-225N 20MB SCSI hard drive, but was later manufactured with a full-height 3.5" MiniScribe 8425SA 20MB SCSI hard drive. The latter drive was the same size as the drive inside the Macintosh Hard Disk 20, but 10 to 15 MB over what had previously been offered by Apple for the II family.
The $1,500 model had 2 MB of memory and a 40 MB hard disk. The Classic features several improvements over the Macintosh Plus, which it replaced as Apple's low-end Mac computer: it is up to 25 percent faster than the Plus, [1] about as fast as the SE, [5] and includes an Apple SuperDrive 3.5" floppy disk drive as standard. [19]