Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-08-28
2007-08-28
Bragdon, Reginald (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S111000, C711S156000, C711S202000, C711S203000
Reexamination Certificate
active
11523546
ABSTRACT:
A system and method for managing disk space in a thin-provisioned storage subsystem. If a number of free segments in a free segment pool at a storage subsystem is detected as below a desired minimum, one or more of the following is performed: selecting and adding logical devices (LDEVs) from an internal storage as free segments to the free segment pool, transitioning LDEVs to a virtual device (VDEV), and/or selecting and adding LDEVs from an external storage as free segments to the free segment pool. The transitioning includes identifying partially used or completely used LDEVs and transitioning these to the VDEV. Data migration may also occur by: selecting a source segment at a VDEV for migration, reading data from the source segment, writing the data to a target segment, the target segment being a free segment from the free segment pool, and assigning the target segment to the VDEV.
REFERENCES:
patent: 5412780 (1995-05-01), Rushton
patent: 5881311 (1999-03-01), Woods
patent: 6598143 (2003-07-01), Baker et al.
patent: 6725328 (2004-04-01), Kano et al.
patent: 6823442 (2004-11-01), Cameron
patent: 2005/0177684 (2005-08-01), Hoshino et al.
patent: 2005/0195660 (2005-09-01), Kavuri et al.
patent: 2005/0198436 (2005-09-01), Iida et al.
patent: 2006/0064550 (2006-03-01), Katsuragi et al.
patent: 2006/0090048 (2006-04-01), Okumoto et al.
Hough,Geoffrey, Sr., “3PAR Thin Provisioning, Eliminating Allocated-But-Unused Storage and Accelerating ROI”, 3PAR Proprietary, Jun. 2003.
Bragdon Reginald
Flournoy Horace L.
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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