公开(公告)号：GB2556577B

公开(公告)日：2019-01-09

申请号：GB201801788

申请日：2016-12-09

Applicant: IBM

Inventor： ROMAN PLETKA ,  CHARLES JOHN CAMP ,  AARON DANIEL FRY ,  TIMOTHY JOHN FISHER ,  NIKOLAS IOANNOU ,  SASA TOMIC ,  THOMAS PARNELL

IPC: G06F12/02 ,  G06F3/06 ,  G06F11/10

Abstract: A data storage system includes a controller and a non-volatile memory array having a plurality of blocks each including a plurality of physical pages. The controller maintains a logical-to-physical translation (LPT) data structure that maps logical addresses to physical addresses and implements a first data protection scheme that stripes write data over the plurality of physical blocks. In response to a read request requesting data from a target page stripe, the controller detecting errors in multiple physical pages of the target page stripe. In responsive to detecting errors in multiple physical pages of the target page stripe, the controller scans the LPT data structure to identify a set of logical addresses mapped to the target page stripe and triggers recovery of the target page stripe by a higher level controller that implements a second data protection scheme, wherein triggering recovery includes transmitting the set of logical addresses to the higher level controller.

公开(公告)号：GB2556577A

公开(公告)日：2018-05-30

申请号：GB201801788

申请日：2016-12-09

Applicant: IBM

Inventor： ROMAN PLETKA ,  CHARLES JOHN CAMP ,  AARON DANIEL FRY ,  TIMOTHY JOHN FISHER ,  NIKOLAS IOANNOU ,  SASA TOMIC ,  THOMAS PARNELL

IPC: G06F3/06 ,  G06F12/02 ,  G06F11/10

Abstract: A data storage system includes a controller and a non-volatile memory array having a plurality of blocks each including a plurality of physical pages. The controller maintains a logical-to-physical translation (LPT)data structure that maps logical addresses to physical addresses and implements a first data protection scheme that stripes write data over the plurality of physica1 blocks. In response to a read request requesting data from a target page stripe, the controller detecting errors in multiple physical pages of the target page stripe. In responsive to detecting errors in multiple physical pages of the target page stripe, the controller scans the LPT data structure to identify a set of logical addresses mapped to the target page stripe and triggers recovery of the target page stripe by a higher level controller that implements a second data protection scheme, wherein triggering recovery includes transmitting the set of logical addresses to the higher level controller.