LOW-OVERHEAD STORAGE OF A HIBERNATION FILE IN A HYBRID DISK DRIVE

摘要

A hybrid drive and associated methods provide low-overhead storage of a hibernation file in the hybrid hard disk drive. During operation, the hybrid drive allocates a portion of solid-state memory in the drive that is large enough to accommodate a hibernation file associated with a host device of the hybrid drive. In addition to the erased memory blocks that are normally present during operation of the hybrid drive, the portion of solid-state memory allocated for accommodating the hibernation file may include over-provisioned memory blocks, blocks used to store a previous hibernation file that has been trimmed, and/or non-dirty blocks.

主权项

1. A method of hibernating a device having a volatile memory and connected to a nonvolatile storage unit configured with a solid-state memory and a magnetic memory, the method comprising:
receiving a hibernate command; and upon receiving the hibernate command, storing contents of the volatile memory in first and second portions of the solid-state memory without storing contents of the volatile memory in the magnetic memory, wherein the first portion comprises erased memory blocks and the second portion comprises memory blocks storing at least one of data that are also stored on the magnetic memory, invalid data, and contents of a previous hibernation file associated with the device.