The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2014
Filed:
Mar. 01, 2012
Zvonimir Z. Bandic, San Jose, CA (US);
Cyril Guyot, San Jose, CA (US);
Tomohiro Harayama, Sunnyvale, CA (US);
Hitoshi Kamei, Kanagawa, JP;
Takaki Nakamura, Kanagawa, JP;
Timothy Tsai, Alviso, CA (US);
Zvonimir Z. Bandic, San Jose, CA (US);
Cyril Guyot, San Jose, CA (US);
Tomohiro Harayama, Sunnyvale, CA (US);
Hitoshi Kamei, Kanagawa, JP;
Takaki Nakamura, Kanagawa, JP;
Timothy Tsai, Alviso, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A method and a storage system are provided for implementing a sustained large block random write performance mechanism for shingled magnetic recording (SMR) drives in a redundant array of inexpensive disks (RAID). A Solid State Drive (SSD) is provided with the SMR drives in the RAID. The SSD is used in a hot spare mode, which is activated when a large block random-write event is identified for a SMR drive in the RAID. In the hot spare mode, the SSD temporarily receives new incoming writes for the identified SMR drive. Then the identified SMR drive is updated from the SSD to restore the state of the identified SMR drive, and operations continue with normal writing only using the SMR drives in the RAID.