Title:
STORAGE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/078741
Kind Code:
A1
Abstract:
A storage apparatus according to an aspect of the present invention includes: a storage controller that accepts write data from a host computer; and a plurality of storage devices that have predetermined amounts of physical areas and that compress data and store the compressed data in the physical areas. The storage controller manages more than (N + M) units of the storage devices as a parity group, and the storage controller generates M parities from N items of data written from the host computer and stores the M parities individually in different ones of the storage devices in the parity group. Meanwhile, in logical storage spaces of the storage devices, spare stripes serving as areas for storing data recovered at the time of rebuild processing are provided. The storage controller is characterized by inhibiting writing to the spare stripes in normal situations, and permitting the use of certain amounts of physical areas needed for storing data to be written to the spare stripes when triggered by the occurrence of a fault in the storage devices.
Inventors:
OSHIMA YUTAKA (JP)
KUROKAWA ISAMU (JP)
KATSURAGI EIJU (JP)
TASHIRO ATSUSHI (JP)
KUROKAWA ISAMU (JP)
KATSURAGI EIJU (JP)
TASHIRO ATSUSHI (JP)
Application Number:
PCT/JP2016/081714
Publication Date:
May 03, 2018
Filing Date:
October 26, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G06F11/10; G06F3/06; G06F12/00
Domestic Patent References:
| WO2016017002A1 | 2016-02-04 | |||
| WO2016142998A1 | 2016-09-15 | |||
| WO2016006072A1 | 2016-01-14 |
Foreign References:
| JP2014137758A | 2014-07-28 | |||
| JP2006302258A | 2006-11-02 |
Other References:
KOICHI ISHIHARA ET AL.: "Cloud system Muke Kokoritsu Kokino Storage", NEC TECHNICAL JOURNAL, vol. 63, no. 2, 23 April 2010 (2010-04-23), pages 84 - 88
Attorney, Agent or Firm:
PATENT CORPORATE BODY DAI-ICHI KOKUSAI TOKKYO JIMUSHO (JP)
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