公开(公告)号：US5446853A

公开(公告)日：1995-08-29

申请号：US622922

申请日：1991-01-18

申请人： Robert E. Dean ,  Steven C. Cacka ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

发明人： Robert E. Dean ,  Steven C. Cacka ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

IPC分类号： G06F13/10 ,  G06F3/06 ,  G11B20/10 ,  G11B27/00 ,  G06F13/00

CPC分类号： G06F3/0601 ,  G11B20/10 ,  G11B27/002 ,  G06F2003/0691 ,  G11B2020/10916

摘要： A track image read/write head buffer provides a buffer memory for each read/write head in the rotating media data storage system so that a seek request from the processor can be handled as soon as the beginning of the requested data record is positioned below the associated read/write head. The data image of the entire data storage track that contains the requested data record stored on the rotating media is read from the rotating media by the read/write head and stored in the track image read/write head buffer independent of the availability of a data communication path to the processor. Thus, the read data operation need not be synchronized with the availability of a data communication path to the processor and the requested data record is retrieved from the rotating media as soon as the data record is properly positioned. In no case is the data retrieval time greater than one revolution of the rotating media. The error correction codes written on the rotating media to protect the integrity of the requested data are maintained since they are stored in the read/write head buffer along with the data record.

摘要翻译： 轨道图像读/写头缓冲器为旋转介质数据存储系统中的每个读/写头提供缓冲存储器，使得一旦所请求的数据记录的开始位于 相关的读/写头。 存储在旋转介质上的包含请求的数据记录的整个数据存储轨道的数据图像由读/写头从旋转介质中读取，并且独立于数据的可用性被存储在轨迹图像读/写头缓冲器中 到处理器的通信路径。 因此，读取数据操作不需要与处理器的数据通信路径的可用性同步，并且一旦数据记录被正确定位，则从旋转介质检索所请求的数据记录。 在任何情况下，数据检索时间大于旋转介质的一转。 写入在旋转介质上以保护所请求数据的完整性的纠错码被保留，因为它们与数据记录一起存储在读/写头缓冲器中。

公开(公告)号：US5341479A

公开(公告)日：1994-08-23

申请号：US778301

申请日：1991-10-16

申请人： Robert E. Dean ,  Steven C. Cacka ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

发明人： Robert E. Dean ,  Steven C. Cacka ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

IPC分类号： G06F3/06 ,  G11B19/02 ,  G11B20/10 ,  G11B20/12 ,  G11B27/30 ,  G06F13/00

CPC分类号： G06F3/0601 ,  G11B19/02 ,  G11B20/10 ,  G11B20/12 ,  G11B27/3027 ,  G06F2003/0691 ,  G11B2020/10916

摘要： The address mark triggered read/write head buffer provides a buffer memory for each read/write head in the rotating media data storage system that stores the entire track of data that includes the requested data record. Thus, the address mark triggered read/write head buffer retrieves the requested data record independent of the control module so that a seek request from the processor can be handled as soon as the beginning of the next data record stored on the track is positioned below the associated read/write head. The entire track is thereby staged faster on the average than the time to retrieve the requested data record. The address mark triggered read/write head buffer includes an address mark detection circuit to identify the beginning of the data field in each data record. The address mark is a predetermined data pattern of n bits that is written on the track a predetermined distance in advance of the data field of the data record. The address mark detection circuit compares the n data bits most recently read from the track with this predetermined data pattern of n bits as stored in memory. Once a match is detected, the buffer is enabled to store the next data record written on the track and all subsequent data records on the track.

摘要翻译： 地址标记触发的读/写头缓冲器为旋转介质数据存储系统中的每个读/写头提供缓冲存储器，其存储包括所请求的数据记录的整个数据轨迹。 因此，地址标记触发的读/写头缓冲器独立于控制模块检索所请求的数据记录，使得一旦存储在轨道上的下一个数据记录的开始位于 相关的读/写头。 因此，整个轨道的平均时间比检索所请求的数据记录的时间更快。 地址标记触发的读/写头缓冲器包括一个地址标记检测电路，以识别每个数据记录中数据字段的开始。 地址标记是在数据记录的数据字段之前预定距离上写入轨道的n位的预定数据模式。 地址标记检测电路将最近从磁道读出的n个数据位与存储在存储器中的n位的这种预定数据模式进行比较。 一旦检测到匹配，缓冲区就可以存储写在轨道上的下一个数据记录和轨道上的所有后续数据记录。

公开(公告)号：US5155811A

公开(公告)日：1992-10-13

申请号：US304662

申请日：1989-01-31

申请人： Robert E. Dean ,  Steven C. Cacka ,  John F. Kitchen ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

发明人： Robert E. Dean ,  Steven C. Cacka ,  John F. Kitchen ,  Douglas P. Schaefer ,  Hossein F. Sevvom ,  Robert A. Brumnet

IPC分类号： G06F11/10 ,  G06F13/362

CPC分类号： G06F13/362 ,  G06F11/1008

摘要： The read/write head buffer provides a buffer memory for each read/write head in the rotating media data storage system to that a seek request from the processor can be handled as soon as the beginning of the requested data record is positioned below the associated read/write head. The data image stored on the rotating media is read from the rotating media by the read/write head and stored in the read/write head buffer independent of the availability of a data communication path to the processor. Thus, the read data operation need not be synchronized with the availability of a data communication path to the processor and the requested data is retrieved from the rotating media as soon as the data record is properly positioned. In no case is the data retrieval time greater than one revolution of the rotating media. The error correction codes written on the rotating media to protect the integrity of the requested data are maintained since they are stored in the read/write head buffer along with the data record. Thus, once a data communication path is established to the processor, the control module receives the track data image from the read/write head buffer and can deformat this data from the bit serial, run length limited coding with error correction characters format of this data and convert this information to eight bit parallel data that is in an input/output record format for use by the control unit.

摘要翻译： 读/写头缓冲器为旋转介质数据存储系统中的每个读/写头提供缓冲存储器，以便在所请求的数据记录的开始位于关联的读取位置之下时可以处理来自处理器的寻求请求 /写头。 存储在旋转介质上的数据图像由读/写头从旋转介质中读取，并且存储在读/写头缓冲器中，独立于到处理器的数据通信路径的可用性。 因此，读取数据操作不需要与处理器的数据通信路径的可用性同步，并且一旦数据记录被正确定位，就从旋转介质中检索所请求的数据。 在任何情况下，数据检索时间大于旋转介质的一转。 写入在旋转介质上以保护所请求数据的完整性的纠错码被保留，因为它们与数据记录一起存储在读/写头缓冲器中。 因此，一旦向处理器建立了数据通信路径，则控制模块从读/写头缓冲器接收轨迹数据图像，并且可以从位串行，游程长度受限编码使该数据的格式化，该数据具有该数据的纠错字符格式 并将该信息转换成输入/输出记录格式的八位并行数据，以供控制单元使用。