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    • 3. 发明授权
    • Flexible-capacity scaling for efficient access of ordered data stored on
magnetic tape media
    • 灵活容量扩展,可有效访问存储在磁带介质上的有序数据
    • US5757571A
    • 1998-05-26
    • US614434
    • 1996-03-12
    • Robert Beverley BashamKirby Grant DahmanSteven Bennett Wilson
    • Robert Beverley BashamKirby Grant DahmanSteven Bennett Wilson
    • G11B20/12G06F3/06G11B5/008G11B15/02G11B15/087G11B20/10G11B27/10G11B27/28G11B27/32G11B15/18
    • G06F3/0682G06F3/0608G06F3/061G06F3/0644G11B20/10G11B27/107G11B27/28G11B27/322G11B27/328G11B5/00817G11B15/026G11B15/087G11B2220/90G11B2220/95
    • Various data storage formats help to efficiently locate, read, and write user data stored on magnetic tape media. A tape is formatted by writing multiple segment-headers, free from any interleaved access of user data. Adjacent segment-headers are spaced by a predetermined interval to define multiple data storage segments. Segment-headers all contain a unique key, which is copied into a key index to identify valid segments. After formatting, normal tape accesses can be performed. Without erasing any old headers or data, a new formatting scheme can be established by writing new segment-headers on the tape. The new segment-headers include a new unique key, replacing the previous key in the key index. Previous segment-headers stored on the tape are ignored, since they lack the updated key. Segments may be selectively grouped to provide independently addressable partitions. Mapping between segments and partitions can use a fixed relationship (e.g. one-to-one), or each partition may be variably sized according to the amount of data to be stored therein. Variable-sized partitions may be automatically padded with a selected number of empty segments. Another feature is flexible-capacity scaling, which distributes an ordered set of device blocks on a multi-track magnetic tape medium. The device blocks are bi-directionally stored in a continuous configuration of multiple adjacent stacked serpentine patterns occupying some or all of the tape. This configuration permits sequential access of all device blocks without advancing the tape medium to skip over regions between adjacent device blocks.
    • 各种数据存储格式有助于有效地定位,读取和写入存储在磁带介质上的用户数据。 通过写入多个段头来格式化磁带,没有任何交织的用户数据访问。 相邻的分段报头间隔预定间隔以定义多个数据存储段。 段头都包含唯一的密钥,它被复制到密钥索引中以标识有效的段。 格式化后,可以执行正常的磁带访问。 在不擦除任何旧标头或数据的情况下,可以通过在磁带上写入新的段头来建立新的格式化方案。 新的分段标题包括一个新的唯一键,替换键索引中的上一个键。 存储在磁带上的前一个段头将被忽略,因为它们缺少更新的密钥。 分段可以被选择性地分组以提供独立的可寻址分区。 段和分区之间的映射可以使用固定关系(例如一对一),或者每个分区可以根据要存储在其中的数据量而变化地大小。 可变大小的分区可以自动填充选定数量的空段。 另一个特征是灵活容量缩放,其在多轨磁带介质上分配一组有序的设备块。 装置块被双向地存储在占据某些或全部磁带的多个相邻堆叠蛇形图案的连续配置中。 该配置允许所有设备块的顺序访问,而不需要使带介质跳过相邻设备块之间的区域。
    • 4. 发明授权
    • Tape pre-formatting with uniform data storage segments selectively
mapped to fixed or variable sized independently addressable data
storage partitions
    • 磁带预格式化,统一数据存储段选择性地映射到固定或可变大小的独立可寻址数据存储分区
    • US5969893A
    • 1999-10-19
    • US899042
    • 1997-07-23
    • Robert Beverley BashamKirby Grant DahmanScott Milton FrySteven Douglas JohnsonSteven Bennett Wilson
    • Robert Beverley BashamKirby Grant DahmanScott Milton FrySteven Douglas JohnsonSteven Bennett Wilson
    • G11B5/008G11B5/584G11B15/087G11B20/12G11B27/10G11B27/32G11B5/09
    • G11B5/584G11B15/087G11B20/1202G11B27/107G11B27/322G11B27/328G11B5/00813G11B5/00817G11B2220/90G11B2220/95
    • Various data storage formats help to efficiently locate, read, and write user data stored on magnetic tape media. A tape is formatted by writing multiple segment-headers, free from any interleaved access of user data Adjacent segment-headers are spaced by a predetermined interval to define multiple data storage segments. Segment-headers all contain a unique key, which is copied into a key index to identify valid segments. After formatting, normal tape accesses can be performed. Without erasing any old headers or data, a new formatting scheme can be established by writing new segment-headers on the tape. The new segment-headers include a new unique key, replacing the previous key in the key index. Previous segment-headers stored on the tape are ignored, since they lack the updated key. Segments may be selectively grouped to provide independently addressable partitions. Mapping between segments and partitions can use a fixed relationship (e.g. one-to-one), or each partition may be variably sized according to the amount of data to be stored therein. Variable-sized partitions may be automatically padded with a selected number of empty segments. Another feature is flexible-capacity scaling, which distributes an ordered set of device blocks on a multi-track magnetic tape medium. The device blocks are bi-directionally stored in a continuous configuration of multiple adjacent stacked serpentine patterns occupying some or all of the tape. This configuration permits sequential access of all device blocks without advancing the tape medium to skip over regions between adjacent device blocks.
    • 各种数据存储格式有助于有效地定位,读取和写入存储在磁带介质上的用户数据。 通过写入多个分段报头来格式化磁带,没有用户数据的任何交错访问。相邻分段报头间隔预定间隔以定义多个数据存储段。 段头都包含唯一的密钥,它被复制到密钥索引中以标识有效的段。 格式化后,可以执行正常的磁带访问。 在不擦除任何旧标头或数据的情况下,可以通过在磁带上写入新的段头来建立新的格式化方案。 新的分段标题包括一个新的唯一键,替换键索引中的上一个键。 存储在磁带上的前一个段头将被忽略,因为它们缺少更新的密钥。 分段可以被选择性地分组以提供独立的可寻址分区。 段和分区之间的映射可以使用固定关系(例如一对一),或者每个分区可以根据要存储在其中的数据量而变化地大小。 可变大小的分区可以自动填充选定数量的空段。 另一个特征是灵活容量缩放,其在多轨磁带介质上分配一组有序的设备块。 装置块被双向地存储在占据某些或全部磁带的多个相邻堆叠蛇形图案的连续配置中。 该配置允许所有设备块的顺序访问,而不需要使带介质跳过相邻设备块之间的区域。