公开(公告)号：US11256585B2

公开(公告)日：2022-02-22

申请号：US16821562

申请日：2020-03-17

申请人： Hitachi, Ltd.

发明人： Yoshiaki Deguchi ,  Naoya Okada ,  Ryosuke Tatsumi ,  Kentaro Shimada ,  Sadahiro Sugimoto

IPC分类号： G06F11/00 ,  G06F11/20 ,  G06F11/07 ,  G06F11/30 ,  G06F9/4401 ,  G06F1/24 ,  G06F9/54 ,  G06F12/06 ,  G06F12/0873 ,  G06F9/50

摘要： A storage system includes a first storage controller including a plurality of main storage media and one or more processor cores, and a second storage controller including a plurality of main storage media and one or more processor cores and performing communication with the first storage controller. Storage areas of the main storage media in the first storage controller are allocated to an address map. In response to the occurrence of failures in one or mode main storage media of the main storage media of the first storage controller, the first storage controller performs restarting to reallocate the storage areas of the main storage media excluding one or more main storage media having caused the failures to an address map reduced than before the occurrence of the failures. The second storage controller continues operating during the restarting of the first storage controller.

公开(公告)号：US11467904B2

公开(公告)日：2022-10-11

申请号：US17201151

申请日：2021-03-15

申请人： Hitachi, Ltd.

发明人： Takeru Chiba ,  Hiroki Fujii ,  Yoshiaki Deguchi

IPC分类号： G06F11/10 ,  G06F11/14

摘要： A storage system including a storage controller and a plurality of storage drives generates parity data from data. Data and parity data configure a stripe. A plurality of stripes configure a parity group allocated with a plurality of storage drives to store the parity group. A first parity group allows the number of storage drives allocated to the parity group to be equal to the number of data pieces configuring each stripe. A second parity group allows the number of storage drives allocated to the parity group to be larger than the number of data pieces configuring each stripe and allows data for each stripe to be distributed and stored in different combinations of storage drives. When the first parity group is converted to the second parity group, a storage drive is added so that it is allocated to the parity group. Data is moved to ensure a free area.

公开(公告)号：US11150820B2

公开(公告)日：2021-10-19

申请号：US17022810

申请日：2020-09-16

申请人： HITACHI, LTD.

发明人： Hiroki Fujii ,  Yoshinori Ohira ,  Takeru Chiba ,  Yoshiaki Deguchi

IPC分类号： G06F3/06

摘要： Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.