Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2006-06-09
2011-11-08
Lohn, Joshua (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S006210
Reexamination Certificate
active
08055938
ABSTRACT:
A method, system, apparatus, and computer-readable medium are provided for storing data at a virtual tape library (“VTL”) computer or server. According to one method, a VTL computer maintains one or more storage volumes for use by initiators on an array of mass storage devices. Space on each of the volumes is allocated using thin provisioning. The VTL computer may also include a cache memory that is at least the size of a full stripe of the array. Write requests received at the VTL computer are stored in the cache memory until a full stripe of data has been received. Once a full stripe of data has been received, the full stripe of data is written to the array at once. The array utilized by the VTL computer may include a hot spare mass storage device. When a failed mass storage device is identified, only the portions of the failed device that have been previously written are rebuilt onto the hot spare. The array may be maintained using RAID-5. If one of the mass storage devices in the array fails, any subsequent writes directed to the array may be stored using RAID-0.
REFERENCES:
patent: 4942579 (1990-07-01), Goodlander et al.
patent: 5257367 (1993-10-01), Goodlander et al.
patent: 5392244 (1995-02-01), Jacobson et al.
patent: 5720027 (1998-02-01), Sarkozy et al.
patent: 5732238 (1998-03-01), Sarkozy
patent: 5790774 (1998-08-01), Sarkozy
patent: 5893919 (1999-04-01), Sarkozy et al.
patent: 5974426 (1999-10-01), Lee et al.
patent: 6098128 (2000-08-01), Velez-McCaskey et al.
patent: 6389432 (2002-05-01), Pothapragada et al.
patent: 6985995 (2006-01-01), Holland et al.
patent: 7127557 (2006-10-01), Ito et al.
patent: 7373366 (2008-05-01), Chatterjee et al.
patent: 7536529 (2009-05-01), Chatterjee et al.
patent: 2002/0161983 (2002-10-01), Milos et al.
patent: 2003/0163630 (2003-08-01), Aasheim et al.
patent: 2004/0210731 (2004-10-01), Chatterjee et al.
patent: 2004/0230766 (2004-11-01), Cameron
patent: 2005/0114598 (2005-05-01), Hartung et al.
patent: 2005/0182992 (2005-08-01), Land et al.
patent: 2005/0257083 (2005-11-01), Cousins
patent: 2006/0031468 (2006-02-01), Atluri et al.
patent: 2006/0080505 (2006-04-01), Arai et al.
patent: 2006/0112221 (2006-05-01), Hu et al.
patent: 2006/0143418 (2006-06-01), Takahashi et al.
Hough, Geoffrey; 3PAR Thin Provisioning, Eliminating Allocated—But—Unused Storage and Accelerating ROI, 3PAR, Jun. 2003, pp. 1-14.
Hough, Geoff; 3PAR Utility Storage, Benefits Summary; 3PAR; Jun. 2003, pp. 1-11.
Chen, et al., RAID: High-Performance, Reliable Secondary Storage, 1997, Association for Computing Machinery, pp. 1-41.
U.S. Appl. No. 11/254,347, filed Oct. 20, 2005, entitled “Method, System, Apparatus, And Computer-Readable Medium for Provisioning Space in a Data Storage System,” Inventors: Chatterjee et al.
U.S. Official Action dated Sep. 4, 2007 in U.S. Appl. No. 11/254,347.
U.S. Official Action dated Mar. 18, 2008 in U.S. Appl. No. 11/254,347.
U.S. Official Action dated Oct. 8, 2008 in U.S. Appl. No. 11/254,347.
U.S. Notice of Allowance / Allowability dated Jan. 12, 2009 in U.S. Appl. No. 11/254,347.
U.S. Appl. No. 12/425,123, filed Apr. 16, 2009, entitled “Provisioning Space in a Data Storage System,” Inventors: Chatterjee et al.
Chatterjee Paresh
Grandhi Suresh
Subramanian Srikumar
Vempati Srinivasa Rao
American Megatrends Inc.
Lohn Joshua
McKeon Meunier Carlin & Curfman LLC
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