Tape Backup 40SC


At A Glance

The Apple Tape Backup 40SC was launched in 1987. It was a SCSI based peripheral for Macintosh owners to backup and restore critical data. The unit provided up to 40Mb of storage with a SCSI based interface for improved speed. Read the original specifications of the Apple Tape Backup 40SC at the Apple support site.

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Original Specifications


  • Recording media:
    • 1/4 inch removable mini-cartridge (DC2000) preformatted
  • Capacity:
    • Formatted Capacity: 38.5 megabytes of fully corrected data
    • Block Size: 8,192 bytes
    • Sectors/Tracks: 24; serpentine
  • Characteristics:
    • Data format: Industry-standard QIC-100 1/4-inch cartridge (8 kilobytes of user data, 4 kilobytes of data redundancy)
    • Tape speed: 60 inches per second read or write, 90 inches per second search or rewind
    • Transfer rate: 1.25 megabyts per second
    • Volume backup time: approximately 17 to 18 minutes per 20 megabytes
  • Backup software features:
    • Volume (image) backup: Allows users to back up an entire Heirachical File System (HFS) disk volume
    • Volume (image) restore: Restores an entire HFS disk volume from the tape containing a prior backup
    • File backup: Backs up individual files/folders. Includes option to back up only files that have changes since previous file backup
    • File restore: Restores files that have been backed up in File Backup mode
    • Formatting: Formats unformatted tape (35 minutes)
    • Clear tape: Removes unnecessary files
  • Interface:
    • Connects directly to the Macintosh Plus, Macintosh SE or Macintosh II via a 50-pin SCSI port, or to a compatible hard disk.
  • Electrical requirements:
    • Line voltage: 85 to 270 volts
    • Frequency: 47 to 67 hertz
    • Maximum Power: 15 watts to 60 watts
  • Environmental requirements:
    • Operating temperature: 50 F to 95 F (10 C to 40 C)
    • Storage temperature: -40 F to 122 F (0 C to 50 C)
    • Relative humidity: 20% to 80% noncondensing
    • Altitude: 1,000 to 10,000 ft. (304 to 3048 m)
  • Size and weight:
    • Height: 3.01 inches (78 mm)
    • Width: 9.7 inches (246 mm)
    • Depth: 10.5 inches (266 mm)
    • Weight: 7.3 lbs (3.3 kg)





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