Managing boot loaders for virtual hard disks

摘要

The claimed subject matter provides a system or method for managing software changes. An exemplary method comprises creating a reset boot loader, a last known good (LKG) boot loader, and a current boot loader, then pointing the reset boot loader, LKG boot loader, and current boot loader to a parent virtual hard disk (VHD) containing a default master image. An operation to perform is determined, and a service partition is booted into. The LKG boot loader or current boot loader is pointed to a child VHD loaded with another desired image based on the operation selected, and the system is rebooted into the parent VHD or child VHD pointed to by the current boot loader.

主权项

1. A method of managing software changes in a computer system, comprising:
creating a reset boot loader, a last known good (LKG) boot loader, and a current boot loader; pointing the reset boot loader, LKG boot loader, and current boot loader to one or more parent virtual hard disks (VHDs) containing a default master image; determining an operation to perform and rebooting into a service partition; pointing the LKG boot loader or current boot loader to a child VHD loaded with another desired image based on the operation selected; and rebooting into the one or more parent VHDs or child VHD pointed to by the current boot loader, the child VHD comprising a differencing VHD representing a set of changes that are applied to form a new variation of the default master image.