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Technology Stocks : QUANTUM
QNTM 9.380-4.7%Dec 12 9:30 AM EST
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To: Gottfried who wrote (7341)2/16/1998 3:46:00 PM
From: John Biddle  Read Replies (3) of 9124
 
To read from several heads in parallell (i.e. simultaneously) would require a read channel for each head. Again a question of cost. If data is arranged by cylinder (a grouping of tracks on different disks - all accessible without moving the actuator), then one head at a time can be read. While this does not require actuator movement, you still have to wait until the desired data comes by (latency).

I admit to not knowing didley about the cost structure of drives. However, the benefits you speak of by arranging data in cylinders does not minimize the value of parallel reading, it is required by it. By reading from all heads simultaneously, and reassembling the data electronically, you could raise the throughput significantly.
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