公开(公告)号：US07003714B1

公开(公告)日：2006-02-21

申请号：US10832100

申请日：2004-04-26

Applicant: Rajesh Sundaram ,  Srinivvasan Viswanathan ,  Alan Rowe ,  Steven R. Kleiman ,  John K. Edwards

Inventor： Rajesh Sundaram ,  Srinivvasan Viswanathan ,  Alan Rowe ,  Steven R. Kleiman ,  John K. Edwards

IPC: G11C29/00

CPC classification number: G06F11/1076

Abstract: A data storage system, such as RAID, upgraded dynamically including multiple stages, providing error checking data without taking the system off-line. Checksums are computed from the data and placed in block 63 of the same disk. The combination of parity bits across the parity disk, the remaining uncorrupted data in the data disks, and checksums within each disk includes sufficient information to enable restoration of corrupt data. The system is upgraded by reserving permanent checksum blocks, writing the checksums to a volume block number, and placing the checksums in permanently reserved checksum block locations after first moving data already there to unreserved blocks.

Abstract translation: 诸如RAID的数据存储系统，动态地升级包括多级，提供错误检查数据而不使系统离线。 校验和是根据数据计算的，并放在同一个磁盘的块63中。 奇偶校验磁盘上的奇偶校验位的组合，数据磁盘中的其余未被破坏的数据以及每个磁盘内的校验和包括足够的信息以使恢复损坏的数据。 通过保留永久校验和块，将校验和写入卷块号，并在首先将数据移动到未保留的块之后将校验和放置在永久保留的校验和块位置，升级系统。

公开(公告)号：US06728922B1

公开(公告)日：2004-04-27

申请号：US09642062

申请日：2000-08-18

Applicant: Rajesh Sundaram ,  Srinivvasan Viswanathan ,  Alan Rowe ,  Steven R. Kleiman ,  John K. Edwards

Inventor： Rajesh Sundaram ,  Srinivvasan Viswanathan ,  Alan Rowe ,  Steven R. Kleiman ,  John K. Edwards

IPC: G11C2900

CPC classification number: G06F11/1076

Abstract: A data storage system, such as RAID, upgraded dynamically including multiple stages, providing error checking data without taking the system off-line. Checksums are computed from the data and placed in block 63 of the same disk. The combination of parity bits across the parity disk, the remaining uncorrupted data in the data disks, and checksums within each disk includes sufficient information to enable restoration of corrupt data. The system is upgraded by reserving permanent checksum blocks, writing the checksums to a volume block number, and placing the checksums in permanently reserved checksum block locations after first moving data already there to unreserved blocks.

Abstract translation: 诸如RAID的数据存储系统，动态地升级包括多级，提供错误检查数据而不使系统离线。 校验和是根据数据计算的，并放在同一个磁盘的块63中。 奇偶校验磁盘上的奇偶校验位的组合，数据磁盘中的其余未被破坏的数据以及每个磁盘内的校验和包括足够的信息以使恢复损坏的数据。 通过保留永久校验和块，将校验和写入卷块号，并在首先将数据移动到未保留的块之后将校验和放置在永久保留的校验和块位置，升级系统。