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Booting a PARTIES Area Without Clipping Drive

IP.com Disclosure Number: IPCOM000019787D
Original Publication Date: 2003-Sep-29
Included in the Prior Art Database: 2003-Sep-29
Document File: 1 page(s) / 40K

Publishing Venue

IBM

Abstract

How to boot an ANSI/ATAPI PARTIES area without having a PARTIES enabled BIOS or Harddisk

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 77% of the total text.

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Booting a PARTIES Area Without Clipping Drive

Today, to install an ATAPI PARTIES area, you must reduce the size of one or more partitions on a disk drive. This can be time consuming and dangerous to perform.

The PARTIES component, called PARTIES boot file (PBF), that supplies the boot code is distributed as a file. Inside that file is a header section that contains the digital signature plus additional data that describes the size plus the attributes of an image, and a body which is an image of either a floppy diskette or a partition.

To create a PARTIES bootable area without a PARTIES compliant drive, or BIOS, the user needs to copy the PBF into a valid partition; then install a custom MBR, along with a windows utility that reports the location of the PARTIES boot file to the custom MBR.

When the customer boots the computer, the MBR would validate the signature of the PBF and start booting from the body of the PBF. This is done by creating a partition table entry for the PBF file, the starting location of the partition would be the start of the image in the PBF, and end with the ending location of the image in the PBF. The start and end locations are documented in the ANSI specification for PARTIES: ANSI+NCITS+346-2001. The calculations involve simply adding the file location LBA offset to the starting and ending locations of the image. These become the LBA offsets for the partition. This would effectively create a partition within a partition.

This saves the ti...