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

To: Gottfried who wrote (1574)	11/16/1997 4:53:00 PM
From: Mark Adams	Read Replies (2) \| Respond to of 9256

The spec sheets for the new drives states These drives use IBM's new Giant Magnetoresistive Extended (GMR) advanced head technology which increases areal density. No-ID(TM) sector formatting increases capacity by helping to eliminate the overhead caused by duplicate storage of data sector ID fields. storage.ibm.com refers to use of No-ID, providing the link to the actual description of No-ID and how it makes it possible to increase tracks per inch. Quoting.. IBM's No-ID(TM) sector format allows disk drives to be formatted more efficiently, improving the capacity, reliability and performance. The ID (or header) information is stored in solid state memory instead of on the disk surface. This results in the increased capacity of each track without impacting the linear density. When combined with a magneto-resistive head, the No-ID sector format can be used to dramatically increase the track density as well. Further benefits are increased data throughput, improved access time, defect management and power management. Having now heard of MR 2.8 disk/heads, I now wonder about the requirement of GMR to provide 3.1/platter densitys. Please take the time to read the No-ID link, as it provides a graphic explanation of how not having sector id's on the platter allows the increased TPI, & I can't do it justice here..