公开(公告)号：US5187778A

公开(公告)日：1993-02-16

申请号：US579718

申请日：1990-09-10

申请人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Akira Kurano ,  Michio Miyazaki ,  Masafumi Nozawa ,  Takikazu Takeuchi

发明人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Akira Kurano ,  Michio Miyazaki ,  Masafumi Nozawa ,  Takikazu Takeuchi

IPC分类号： G06F12/08 ,  G06F3/06 ,  G06F12/12

CPC分类号： G06F3/0601 ,  G06F2003/0691

摘要： Buffers are separately provided for a region for non-sequential transfer and for a region for sequential transfer in each one of the disk units. A director sends a message to inform at least one of the disk units whether transfer of data the respective disk units are to make is sequential or non-sequential. When the disk unit receives a non-sequential transfer request, it uses the buffer region for non-sequential transfer to transfer data requested by the director and when it receives a sequential transfer request, it uses a plurality of buffer regions for the sequential transfer. Thus, data transfer is performed between a host device and that disk unit.

公开(公告)号：US4633336A

公开(公告)日：1986-12-30

申请号：US648490

申请日：1984-09-10

申请人： Tsuneo Horie ,  Shoji Ozaki ,  Takikazu Takeuchi

发明人： Tsuneo Horie ,  Shoji Ozaki ,  Takikazu Takeuchi

IPC分类号： G11B5/09 ,  G11B5/012 ,  G11B20/10

CPC分类号： G11B20/10212 ,  G11B20/10 ,  G11B5/012

摘要： A magnetic recording apparatus having a plurality of magnetic heads (111-118) by which data is written on and read from a magnetic medium (121-123) has a timing correction unit (3) that controls a suitable timing according to a predetermined characteristic of a selected magnetic head or disk apparatus and the density of logical ONE states in the data so that the data will be written on the magnetic medium under the timing controlled by the timing correction unit. Timing correction may also be provided according to whether the head is an inner or an outer head.

摘要翻译： 具有多个磁头（111-118）的磁记录装置具有数据写入和从磁介质（121-123）读取的磁头（111-118），具有根据预定特性来控制合适的定时的定时校正单元 的选择的磁头或磁盘装置，并且数据中的逻辑ONE状态的密度使得数据将在由定时校正单元控制的定时下被写入磁介质上。 还可以根据头部是内部还是外部头部来提供定时校正。

公开(公告)号：US5148334A

公开(公告)日：1992-09-15

申请号：US444764

申请日：1989-12-01

申请人： Takikazu Takeuchi ,  Hiroyuki Yokohara ,  Takuji Ogawa ,  Noboru Sakurai

发明人： Takikazu Takeuchi ,  Hiroyuki Yokohara ,  Takuji Ogawa ,  Noboru Sakurai

IPC分类号： G11B20/10 ,  G11B20/14 ,  H03L7/08

CPC分类号： G11B20/10222 ,  G11B20/10009 ,  G11B20/1403

摘要： Every other input pulse is extracted from an input signal containing alternate phase-advanced and phase-delayed pulses read out of a magnetic disk unit, a magnetic tape unit or the like. Output pulses in synchronism with the pulses thus extracted are produced. This extraction may be effected only during a predetermined length of time after staring application of the input pulses at the time of pull-in of a phase sync circuit. Whether phase synchronization is to be effected in accordance with advanced-phase or delayed-phase input pulses is determined from time to time as required.

摘要翻译： 从包含从磁盘单元，磁带单元等读出的交替相位提前和相位延迟脉冲的输入信号中提取每个其它输入脉冲。 产生与这样提取的脉冲同步的输出脉冲。 该提取可以仅在相位同步电路的拉入时在施加输入脉冲之后的预定长度的时间内进行。 根据需要不时地确定是否根据高级相位或延迟相位输入脉冲实现相位同步。