Appendix A BREAKING THE 137 GIGABYTE STORAGE BARRIER
This appendix provides information about the 137GB storage barrier. It discusses the history, cause and the solution to overcome this barrier.
A.1 Breaking the 137 Gigabyte Storage Barrier
Capacity barriers have been a fact of the personal computer world since its beginnings in the early 1980’s. At least 10 different capacity barriers have occurred in the storage industry over the last 15 years. The most notable barriers seen previously have been at 528 megabytes and then at 8.4 gigabytes.
The ANSI NCITS T13 Technical Committee (also known as the ANSI ATA committee) has broken this barrier by incorporating a proposal from Maxtor into the
In addition, the proposal from Maxtor that was incorporated into ATA/
The following sections will describe issues surrounding the
A.1.1 History
Many of the “barriers” in the past resulted from BIOS and operating system issues caused by failure to anticipate the remarkable increases in device storage capacity by the people who designed hard disk structures, access routines, and operating systems many years ago. They thought, “Who will ever have xxx much storage?” In some cases, the barriers were caused by hardware or software bugs not found until hard disks had grown in size beyond a certain point where the bugs would occur.
Past barriers often frustrated people trying to add a new hard disk to an older system when they discovered that not all of the designed capacity
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