Title:
STORAGE APPARATUS AND STORAGE CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2014/102882
Kind Code:
A1
Abstract:
A cache memory (CM) in which data, which is accessed with respect to a storage device, is temporarily stored is coupled to a controller for accessing the storage device in accordance with an access command from a higher-level apparatus. The CM comprises a nonvolatile semiconductor memory (NVM), and provides a logical space to the controller. The controller is configured to partition the logical space into multiple segments and to manage these segments, and to access the CM by specifying a logical address of the logical space. The CM receives the logical address-specified access, and accesses a physical area allocated to a logical area, which belongs to the specified logical address. A first management unit, which is a unit of a segment, is larger than a second management unit, which is a unit of an access performed with respect to the NVM. The capacity of the logical space is larger than the storage capacity of the NVM.
Inventors:
SUZUKI AKIFUMI (JP)
OGAWA JUNJI (JP)
YAMAMOTO AKIRA (JP)
OGAWA JUNJI (JP)
YAMAMOTO AKIRA (JP)
Application Number:
PCT/JP2012/008437
Publication Date:
July 03, 2014
Filing Date:
December 28, 2012
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G06F12/08; G06F12/0866; G06F12/0868; G06F12/0871
Foreign References:
| US20120124294A1 | 2012-05-17 | |||
| US6347358B1 | 2002-02-12 | |||
| US20090216945A1 | 2009-08-27 |
Attorney, Agent or Firm:
WILLFORT INTERNATIONAL (3 Kanda-Ogawamachi 3-chome, Chiyoda-k, Tokyo 52, JP)
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