Browse Prior Art Database

Compressed Boot Image

IP.com Disclosure Number: IPCOM000107206D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 1 page(s) / 33K

Publishing Venue

IBM

Related People

Mealey, B: AUTHOR

Abstract

Disclosed is an approach that reduces resources and time required for system initialization. This is accomplished by applying a data compression algorithm to the text and data of a boot-image.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Compressed Boot Image

      Disclosed is an approach that reduces resources and time
required for system initialization.  This is accomplished by applying
a data compression algorithm to the text and data of a boot-image.

      The boot-image is divided into two portions: text and data.
The text is compressed and bound with a decompression program.  It is
decompressed immediately after being loaded.

      The data portion is a RAM disk file system.  The file system is
compressed at the block level.  It is accessed by a psuedo device
driver that compresses on writes and decompresses on reads.  The file
system remains compressed during system initialization reducing the
amount of memory required to hold it.

      Applying compression to a boot image can produce a significant
time savings when booting from a slow device, such as a busy LAN or
floppy disk.  It also reduces the size of the media required to hold
the image.  Finally, it can reduce the amount of memory required to
hold the boot image until system initialization is complete.

      Disclosed anonymously.