公开(公告)号：WO2012158171A1

公开(公告)日：2012-11-22

申请号：PCT/US2011/037184

申请日：2011-05-19

申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  HAMPTON, John, D ,  HUTCHON, Neil, Thomas

发明人： HAMPTON, John, D ,  HUTCHON, Neil, Thomas

IPC分类号： G11B20/18 ,  H04L1/00

CPC分类号： G06F11/1666 ,  G11B20/1833 ,  G11B2020/1836 ,  G11B2220/90

摘要： A data writer is described comprising: a memory to store at least one amount of source data that is to be written to a data storage medium; a processor to arrange the source data into subsets and generate ECC data in respect of each subset, wherein the source data and the associated ECC data are to be written to a data storage medium via a plurality of individual data channels, and wherein the ECC data comprises at least a first degree of ECC protection having a first level of redundancy in respect of a first subset and a second degree of ECC protection having a second level of redundancy in respect of a second subset; a plurality of data writing elements, each to write data from an associated data channel, concurrently with the writing by the other data writing elements of data from respective data channels, to a data storage medium; and a controller, to control the writing by the data writing elements of the source data and the associated ECC data to the data storage medium.

摘要翻译： 描述数据写入器，包括：存储器，用于存储要写入数据存储介质的至少一个源数据量; 处理器，用于将源数据排列成子集并生成关于每个子集的ECC数据，其中源数据和相关联的ECC数据将通过多个单独数据信道写入数据存储介质，并且其中ECC数据 至少包括相对于第一子集具有第一级冗余的第一程度的ECC保护和相对于第二子集具有第二冗余级别的第二程度的ECC保护; 多个数据写入元件，每个数据写入元件与来自相关数据通道的数据写入数据同时写入来自相应数据通道的数据的其他数据写入元件，数据存储介质; 以及控制器，用于将源数据的数据写入元件和相关联的ECC数据的写入控制到数据存储介质。

公开(公告)号：WO2011099975A1

公开(公告)日：2011-08-18

申请号：PCT/US2010/023964

申请日：2010-02-11

申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  WILLIAMS, Christopher ,  TREZISE, Gregory ,  BUCKINGHAM, Jonathan, Peter ,  HUTCHON, Neil, Thomas ,  KENT, Darren, Edward ,  HANA, Andrew ,  WALSH, Peter ,  JIBRY, Rafel ,  MORLING, Robert

发明人： WILLIAMS, Christopher ,  TREZISE, Gregory ,  BUCKINGHAM, Jonathan, Peter ,  HUTCHON, Neil, Thomas ,  KENT, Darren, Edward ,  HANA, Andrew ,  WALSH, Peter ,  JIBRY, Rafel ,  MORLING, Robert

IPC分类号： G11B20/10 ,  G11B15/02

CPC分类号： G11B5/09 ,  G11B20/10527 ,  G11B20/1201 ,  G11B2020/10759 ,  G11B2020/10833 ,  G11B2020/1292 ,  G11B2220/90

摘要： Data storage and retrieval methods and apparatus are provided for facilitating data de-duplication for serial-access storage media such as tape. During data storage, input data is divided into a succession of chunks and, for each chunk, a corresponding data item is written to the storage media. The data item comprises the chunk data itself where it is the first occurrence of that data, and otherwise comprises a chunk-data identifier identifying that chunk of subject data. To facilitate reconstruction of the original data on read-back from the storage media a cache (50) is used together with a database (35R), stored on the media, that includes for each duplicated chunk, the location of the corresponding chunk of subject data.

摘要翻译： 提供了数据存储和检索方法和装置，用于促进诸如磁带的串行存取存储介质的重复数据删除。 在数据存储期间，输入数据被分成一连串的块，并且对于每个块，相应的数据项被写入存储介质。 数据项包括组数据本身，其中它是该数据的第一次出现，否则包括识别该主体数据块的组块数据标识符。 为了便于从存储介质读回原始数据的重建，高速缓存（50）与存储在介质上的数据库（35R）一起使用，该数据库（35R）包括对于每个重复的块，相应的对象块的位置 数据。