Storage controller, system, and method to control the copy and release processes of virtual volumes

Patent metadata

Field	Value
Publication number	US-9268498-B2
Application number	US-201414301387-A
Country	US
Kind code	B2
Filing date	Jun 11, 2014
Priority date	Jun 25, 2013
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A storage controller including a processor, wherein the processor: performs a copy process in which a destination virtual volume is created by copying a source virtual volume in accordance with a copy instruction, performs a release process in which allocation of a destination storage area to a corresponding area of the destination virtual volume that corresponds to an unallocated area to which a source storage area is not allocated, among areas of the source virtual volume at a time point when the copy instruction is received is released in the copy process, specifies a corresponding area that is an unallocated area including one or more update areas updated before the copy process and the release process after the copy instruction among one or more unallocated areas of the source virtual volume, and suppresses the release relating to the corresponding area that corresponds to the specified unallocated area.

First claim

What is claimed is:

1. A storage controller comprising:
a processor,
wherein the processor:
performs a copy process in which a copy destination virtual volume is created by copying a virtual volume to which a storage area of a storage device is variably allocated in accordance with a volume use status in accordance with a copy instruction;
performs a release process in which allocation of a copy destination storage area to a corresponding area of the copy destination virtual…

Assignees

• Fujitsu Ltd

Inventors

• Maeda Jun

Classifications

• G06F3/0614

  Physics · mapped topic

• G06F3/0631

  Physics · mapped topic

• G06F3/0683

  Physics · mapped topic

• G06F3/0665

  Physics · mapped topic

• G06F3/065 Primary

  Physics · mapped topic