Method for managing logical volume in order to support dynamic online resizing and software raid and to minimize metadata and computer readable medium storing the same

Patent 6718436 Issued on April 6, 2004. Estimated Expiration Date:

December 7, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Data processing method to create virtual disks from non-contiguous groups of logically contiguous addressable blocks of direct access storage device
Patent #: 5129088
Issued on: 07/07/1992
Inventor: Auslander, et al.

Computerized system and method for data backup
Patent #: 5435004
Issued on: 07/18/1995
Inventor: Cox, et al.

Apparatus for forming logical disk management data having disk data stripe width set in order to equalize response time based on performance
Patent #: 5761526
Issued on: 06/02/1998
Inventor: Sakakura, et al.

Logical volume manager and method having enhanced update capability with dynamic allocation of storage and minimal storage of metadata information
Patent #: 5897661
Issued on: 04/27/1999
Inventor: Baranovsky, et al.

Data processing system and method including a logical volume manager for storing logical volume data Patent #: 6574705
Issued on: 06/03/2003
Inventor: Peloquin, et al.

Inventors

Assignee

Electronics and Telecommunications Research Institute

Application

No. 10005604 filed on 12/07/2001

US Classes:

711/114, Arrayed (e.g., RAIDs)711/170Memory configuring

Examiners

Primary: Gossage, Glenn

Attorney, Agent or Firm

Jacobson Holman PLLC

International Class

G06F 1300

Abstract

A method for managing a logical volume for minimizing a size of metadata and supporting dynamic online resizing and software redundant array of independent disks (RAID), and a computer-readable recording medium storing instructions for embodying the method, are disclosed. The method includes the metadata having a disk partition table containing information of a disk partition in which the metadata is stored; a logical volume table for maintaining the information of the logical volume by storing duplicated information of the logical volume onto all disk partitions of the logical volume; an extent allocation table for indicating whether each extent in the disk partitions is used or not; and a mapping table for maintaining a mapping information for a physical address space corresponding to a logical address space which is a continuous address space equal in size of storage space of whole logical volume.

Other References

Kim, et al. ; SANtopia Volume Manager . . . ; The 3rd International Conference on Advanced Communication Tech.; Feb. 2001, p. 625-628.
Kim, et al.; Volume Management in SAN Environment; Proceedings of the Eighth Int'l Conference on Parallel and Distributed Systems; Jun. 2001, pp. 500-505.