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Technology Stocks : Disk Drive Sector Discussion Forum -- Ignore unavailable to you. Want to Upgrade?

To: Mark Oliver who wrote (4793)	10/23/1998 11:27:00 AM
From: Z Analyzer	Read Replies (3) \| Respond to of 9256

<<With JIT seek, the drive's controller determines when the desired bits will spin under the spot on the disk where the head will land. The positioning arm then moves at a rate that assures its arrival in time; in effect, this means the arm can often move at a much slower rate than it did under the previous technique. This change can reduce power for the 10,000-rpm drive by 10-to-15 percent, leading to major savings in both heat and power usage in large server racks that have several drives.>> I find it pretty amazing that a disk drive can know it has time to dawdle to get to a track to catch data coming around at 10,000 rpm. Hard to believe its worthwhile for Fujutsu to go to a 3" high end drive to reduce seek time. You would get the same benefit by not using 1/2 inch of a 3 1/2 inch drve but would have a higher internal data rate if the inside tracks were the ones not used. Seems the only possible advantage is the lower power usage. Hard to believe its worth giving up that much capacity for lower power consumption, especially after adjusting for the larger number of drives needed for the same total capacity. And neither these drives nor the arrays are cheap! Z