公开(公告)号：WO2004001600A1

公开(公告)日：2003-12-31

申请号：PCT/US2003/020119

申请日：2003-06-24

Applicant: NETWORK APPLIANCE, INC.

Inventor： KLEIMAN, Steven, R. ,  STRANGE, Stephen, H.

IPC: G06F11/00

CPC classification number: G06F11/1662 ,  G06F11/1092 ,  G06F11/2082 ,  G06F11/2094

Abstract: On disk failure (210), the storage system migrates only those disk blocks that included allocated data, and treats unallocated disk blocks as being logically zero when possible. When there is no spare disk, the source disk block is logically set to zero and parity is recalculated for the RAID stripe associated with the source disk block (223). When there is a spare, unallocated blocks on the spare are logically or physically set to zero upon migration (222). Write operations for the failed disk are redirected to other non-failing disks, and a record of which in-use disk blocks have been thus "migrated" to those other non-failing disks in maintained. Unused disk blocks are proactively set to zero. A target mirror copy is created using information regarding allocated disk blocks, by copying those blocks including allocated data or parity, and by clearing at the mirror those blocks not including any allocated.

Abstract translation: 在磁盘故障（210）中，存储系统仅迁移那些包含已分配数据的磁盘块，并尽可能将未分配的磁盘块视为逻辑0。 当没有备用磁盘时，源磁盘块在逻辑上设置为零，并为与源磁盘块相关联的RAID条带重新计算奇偶校验（223）。 当有空闲时，备用磁盘上的未分配块在迁移时逻辑或物理设置为零（222）。 故障磁盘的写入操作将重定向到其他未发生故障的磁盘，并且将已使用磁盘块的记录“已迁移”到维护中的其他未发生故障的磁盘。 未使用的磁盘块主动设置为零。 使用关于分配的磁盘块的信息来创建目标镜像副本，通过复制包括分配的数据或奇偶校验的那些块，并且通过在镜子上清除不包括任何分配的那些块。

公开(公告)号：EP1535154A1

公开(公告)日：2005-06-01

申请号：EP03742221.9

申请日：2003-06-24

Applicant: Network Appliance, Inc.

Inventor： KLEIMAN, Steven, R. ,  STRANGE, Stephen, H.

IPC: G06F11/00

CPC classification number: G06F11/1662 ,  G06F11/1092 ,  G06F11/2082 ,  G06F11/2094

Abstract: On disk failure (210), the storage system migrates only those disk blocks that included allocated data, and treats unallocated disk blocks as being logically zero when possible. When there is no spare disk, the source disk block is logically set to zero and parity is recalculated for the RAID stripe associated with the source disk block (223). When there is a spare, unallocated blocks on the spare are logically or physically set to zero upon migration (222). Write operations for the failed disk are redirected to other non-failing disks, and a record of which in-use disk blocks have been thus 'migrated' to those other non-failing disks in maintained. Unused disk blocks are proactively set to zero. A target mirror copy is created using information regarding allocated disk blocks, by copying those blocks including allocated data or parity, and by clearing at the mirror those blocks not including any allocated.