Magnetic media

• magnetic storage device (tapes, floppies) physically transported

• high bandwidth, eg St Bernard with 6250 bpi magnetic tape transported across town

  St Bernard takes one hour, tape holds 180 Megabytes, data rate in bits per second:
  
  = 180,000,000 bytes * 8 bits / 3600 secs
  = 400 000 bits per second!

• good for large data transfers

• "reliable" transport

• poor latency

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