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    • 1. 发明申请
    • Host-initiated data reconstruction for improved raid read operations
    • 主机启动的数据重建,以改进突袭读取操作
    • US20050114729A1
    • 2005-05-26
    • US10719180
    • 2003-11-20
    • Karl NielsenColleen StoufferMatthew FairhurstLee Sanders
    • Karl NielsenColleen StoufferMatthew FairhurstLee Sanders
    • G06F11/00
    • G06F11/1076G06F2211/1009G06F2211/109
    • Method, system and computer program product are provided to improve the reliability of data transfers from RAID systems. Although some read errors may be detected by the RAID controller, other errors may not be; undetected errors may affect the integrity of the data. In accordance with the present invention, the host or client issues a first command to the RAID controller to read specified data. After the RAID controller obtains the data from the RAID drives and transmits it to the host, the host verifies the data to detect any errors. If an error is detected by the host, the host issues a second command to the RAID controller to reconstruct the specified data, rather than merely re-read the data. The reconstructed data is then transmitted to the host. Consequently, previously undetected and uncorrected errors may be detected and corrected by the host.
    • 提供方法,系统和计算机程序产品,以提高从RAID系统传输数据的可靠性。 虽然RAID控制器可能检测到一些读取错误,但其他错误可能不是; 未检测到的错误可能会影响数据的完整性。 根据本发明,主机或客户端向RAID控制器发出第一命令以读取指定的数据。 在RAID控制器从RAID驱动器获取数据并将其发送到主机之后,主机将验证数据以检测任何错误。 如果主机检测到错误,主机向RAID控制器发出第二个命令来重建指定的数据,而不是仅重新读取数据。 然后将重建的数据发送到主机。 因此,以前未检测到和未校正的错误可能被主机检测和纠正。