Title:
Reconstruction reading in the RAID array of dynamic composition
Document Type and Number:
Japanese Patent JP6247334
Kind Code:
B2
Abstract:
A system and method for dynamic RAID geometries. A computer system comprises client computers and data storage arrays coupled to one another via a network. A data storage array utilizes solid-state drives and Flash memory cells for data storage. A storage controller within a data storage array is configured to configure a first subset of the storage devices for use in a first RAID layout, the first RAID layout including a first set of redundant data. The controller further configures a second subset of the storage devices for use in a second RAID layout, the second RAID layout including a second set of redundant data. Additionally, the controller configure an additional device not included in either the first subset or the second subset to store redundant data for both the first RAID layout and the second RAID layout. The controller is further configured to initiate a reconstruct read corresponding to a given read request directed to a particular storage device of the plurality of storage devices, in response to determining the particular storage device is exhibiting a non-error related relatively slow read response.
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Inventors:
Col Grove, John
Haze, john
Hong, Bo
Miller, Ethan
Haze, john
Hong, Bo
Miller, Ethan
Application Number:
JP2016096285A
Publication Date:
December 13, 2017
Filing Date:
May 12, 2016
Export Citation:
Assignee:
Pure Storage Incorporated
International Classes:
G06F3/08; G06F3/06; G06F11/10; G06F13/10; G06F13/14
Domestic Patent References:
| JP2005216301A | ||||
| JP2009217408A | ||||
| JP2009037304A | ||||
| JP2003131954A |
Foreign References:
| US20090172335 | ||||
| US20090210742 | ||||
| US20090070651 |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa