公开(公告)号：US20170123944A1

公开(公告)日：2017-05-04

申请号：US14927304

申请日：2015-10-29

Applicant: NetApp, Inc.

Inventor： Peter Macko ,  Steve Byan

IPC: G06F11/20 ,  G11B20/18

CPC classification number: G06F11/2069 ,  G06F2201/805 ,  G11B20/10527 ,  G11B20/1217 ,  G11B20/1803

Abstract: A storage system to recover and rewrite overwritten data is described. A Shingled Magnetic Recording (SMR) array subsystem within the storage system writes data to multiple adjacent tracks on a number of storage devices, such as hard drives that support shingled magnetic recording. While writing data, the SMR array subsystem detects that one of the storage devices erroneously overwrote a portion of the data on one or more of the tracks. The SMR array subsystem can recover the overwritten portion of data using other portions of the data written to corresponding tracks on the other storage devices that are part of the array. The recovered data can then be rewritten to the array.

公开(公告)号：US09836369B2

公开(公告)日：2017-12-05

申请号：US14927304

申请日：2015-10-29

Applicant: NetApp, Inc.

Inventor： Peter Macko ,  Steve Byan

IPC: G06F11/00 ,  G06F11/20 ,  G11B20/18 ,  G11B20/10 ,  G11B20/12

CPC classification number: G06F11/2069 ,  G06F2201/805 ,  G11B20/10527 ,  G11B20/1217 ,  G11B20/1803

Abstract: A storage system to recover and rewrite overwritten data is described. A Shingled Magnetic Recording (SMR) array subsystem within the storage system writes data to multiple adjacent tracks on a number of storage devices, such as hard drives that support shingled magnetic recording. While writing data, the SMR array subsystem detects that one of the storage devices erroneously overwrote a portion of the data on one or more of the tracks. The SMR array subsystem can recover the overwritten portion of data using other portions of the data written to corresponding tracks on the other storage devices that are part of the array. The recovered data can then be rewritten to the array.