document updated 15 years ago, on Oct 3, 2008

GRUB seems to have some difficulties operating in a dynamic environment (for example, when booting from removable media on different computers) when trying to boot an OS frmo the removeable media itself.

grub's own facilities
- Super Grub Disk contains a modified version of GRUB v0.97 that includes the following extra features: (download SGD source code, and diff versus the original GRUB code, to see the changes)
  - usbshift [1] [2]
  - setgrubdevice / $(grub_device) [1]
  - manually do `find`, then manually enter that value into `grub_add` , then use that variable as part of each rule (HOW?)
    - `grub_add` is also a SGD patch, however, it just maps to the "set" command, which is available in stock GRUB
- grub4dos contains a modified version of
  - find --set-root
  - cdrom --init
  - setvbe (set the video mode)
  - && and || operators
other bootloaders to replace grub, or to chainload from grub (rule of thumb: use whatever the other LiveUSB distros use):
- syslinux [1] [2]
- Smart Boot Manager
give booted OS's enough information to find the right partition
- use UUIDs
- use root=label=[partition_label]
don't know how to classify
- grub4dos's grldr