Patent ID: 7640425
Filing Date: 2009-12-29
Classification: G06F

Abstract:
1. A disk apparatus which is incorporated into or connected to a device to make access to a disk during rotation of the disk by rotating the disk while freely stopping the disk, information including boot information necessary to start up the device being written and read in the disk, the disk apparatus comprising: a nonvolatile memory in which the boot information is stored; an operation stop processing section which reads, upon receipt of a predetermined operation stop event, the boot information stored in the disk from the disk, the operation stop processing section checking the read boot information against the boot information stored in the nonvolatile memory, the operation stop processing section updating contents of the nonvolatile memory in order to store the same boot information as the boot information stored in the disk in the nonvolatile memory and writing flag information indicating that the same boot information as the boot information stored in the disk is stored in the nonvolatile memory when a difference exists as a result of the checking; and an operation start processing section which judges, upon receipt of a predetermined operation start event, whether or not the flag information is stored in the nonvolatile memory, the operation start processing section reading the boot information from the nonvolatile memory and starting up the device while deleting the flag information when the flag information is stored, the operation start processing section reading the boot information from the disk to start up the device and writing the boot information read from the disk in the nonvolatile memory when the flag information is not stored.