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To: John Biddle who wrote (7334)2/16/1998 12:57:00 PM
From: UpwardBound  Respond to of 9124
 
John,

Just add a second head to each arm? Easy for you to say.

It's not done because the data heads are the single most expensive item in a hard drive. 1.6" drives with 10 disks will have 20 heads. It's better to improve performance other ways like increasing spin speed, or reducing seek times.

Take Care,

--UpwardBound



To: John Biddle who wrote (7334)2/16/1998 1:12:00 PM
From: Frodo Baxter  Read Replies (2) | Respond to of 9124
 
>I've wondered for a long time why drive mfgs don't add a second (or more) head to each arm in order to be able to read more without seeking again.

If this was true, an 8 head/4 plate 8.4G hard drive would be much faster than a 2 head/1 plate 2.1G drive. It isn't.


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