BOOTABILITY WITH MULTIPLE LOGICAL UNIT NUMBERS

摘要

Bootability of a computer system with multiple LUNs. A flash device powers-on into a default LUN, from which the system boots, maintaining any other LUNs unavailable. The first LUN reconfigures the system to remove itself as the available LUN, to load a second LUN as the only available LUN, and to reboot the computer system into the newly available second LUN. The second LUN reconfigures the system to load any additional LUNs, such as removable storage on the flash drive. Upon reconfiguration, the system includes multiple LUNs. The second LUN includes an interpolated LUN driver, which exposes additional LUNs before operation of other device drivers. The interpolated LUN driver takes control during boot-up, exposing any available LUNs before the regular environment's operating system.

主权项

1. A method, including steps of
booting a computer system from a first logical disk, said first logical disk being specified by a first logical unit number, said first logical disk including first software instructions; said first software instructions configuring said computer system to replace said first logical unit number with a second logical unit number, said second logical unit number indicating a second logical disk; said first software instructions directing said computer system to reboot, wherein said computer system reboots from said second logical disk, said second logical disk including second software instructions; and said second software instructions configuring said computer system to add one or more additional logical unit numbers.