公开(公告)号：DE69020668T2

公开(公告)日：1996-03-07

申请号：DE69020668

申请日：1990-08-02

Applicant: IBM

Inventor： NAKAGAWA YOSHIHIRO ,  NUMATA TSUTOMU ,  OHGAKI KAZUTAKA

IPC: G06F3/06 ,  G11B5/596 ,  G11B27/10 ,  G11B5/55

Abstract: A microprocessor 10 controls the access of head 6 to storage disk 2. The final sector in each track on a storage disk 2 is provided with final sector designating means 41. On reaching the final sector, an interrupt signal is applied to the microprocessor and the access to that track can be completed.

公开(公告)号：GB2285165A

公开(公告)日：1995-06-28

申请号：GB9425465

申请日：1994-12-16

Applicant: IBM

Inventor： NAKAMURA TAKASHI ,  NUMATA TSUTOMU ,  OGASAWARA KENJI ,  KIGAMI YUJI ,  KURACHI KOJI ,  OKADA MAYUMI ,  MATSUI TAKAO ,  YOKOE YUJI

IPC: G11B20/10 ,  G11B5/012 ,  G11B5/09 ,  G11B19/02 ,  G11B20/12 ,  G11B20/18 ,  G11B27/10

Abstract: A disk drive apparatus comprising a disk recording medium in which each track is divided into a servo area which stores information for identifying the track position and a plurality of data sectors wherein at least one of said data sectors crosses said servo area and a look-up table is provided for identifying the position of each sector based upon the relationship between a physical sector identifier, said position information and the capacity of the sector crossing said servo area. When a signal SP at the end of a servo area is detected in a dead state 80 during start up, a first data state 84 for the start of a sector transits to a second data state 86 for the later region of the sector being divided in accordance with the capacity stored in a current sectors pointer register 60. At the beginning of the sector, the contents of a next sectors pointer register 62 is stored in register 60 and the contents of a next sectors operation register 66 is stored in a current sectors operation register 64. Upon completion of sector processing, the first data state 84 is maintained when the next sector is contiguous. When a terminate instruction is stored in register 64, the process moves to dead state 80. When the servo area arrives, the process moves to idle state 82. Responsive to this state, the magnetic head is activated to enable read and write operation 5 for sectors having no sector ID on the disk.

公开(公告)号：DE69020668D1

公开(公告)日：1995-08-10

申请号：DE69020668

申请日：1990-08-02

Applicant: IBM

Inventor： NAKAGAWA YOSHIHIRO ,  NUMATA TSUTOMU ,  OHGAKI KAZUTAKA

IPC: G06F3/06 ,  G11B5/596 ,  G11B27/10 ,  G11B5/55

Abstract: A microprocessor 10 controls the access of head 6 to storage disk 2. The final sector in each track on a storage disk 2 is provided with final sector designating means 41. On reaching the final sector, an interrupt signal is applied to the microprocessor and the access to that track can be completed.

公开(公告)号：SG44424A1

公开(公告)日：1997-12-19

申请号：SG1996000329

申请日：1993-11-09

Applicant: IBM

Inventor： NUMATA TSUTOMU ,  KIGAMI YUJI ,  SAKAI TATSUYA ,  SHIMIZU KENJI

IPC: G06F3/06 ,  G06F9/445 ,  G06F13/12 ,  G06F13/38 ,  G06F9/44

Abstract: A programmable external storage control apparatus is provided which requires minimum intervention of a microprocessor and has more extendibility and flexibility. It includes a buffer (16) which stores a data transfer control program in addition to data to be transferred between a host (10) and an external storage (14), a controller (18) which reads from the buffer (16) and executes the data transfer control programs, and a microprocessor (20) which starts reading of the program from the buffer (16) to the controller (18) in response to a command from the host (10). The controller (18) controls data transfer between the host and the external storage independently of the microprocessor (20) while the microprocessor (20) may execute other jobs.

公开(公告)号：CA2023615A1

公开(公告)日：1991-02-25

申请号：CA2023615

申请日：1990-08-20

Applicant: IBM

Inventor： NAKAGAWA YOSHIHIRO ,  NUMATA TSUTOMU ,  OHGAKI KAZUTAKA

IPC: G06F3/06 ,  G11B5/596 ,  G11B27/10 ,  G11B19/00 ,  G11B19/14

Abstract: JA9-89-009 DISK CONTROL APPARATUS A disk control apparatus for controlling head access to a multi-track disk includes a means for detecting final sectors in the disks and generating a final sector detection signal upon locating any final sector designating means provided in the respective final sectors of each of the tracks of the disk. The final sector designating means may be provided by merely reversing the bit value (e.g. 0 to 1) in an I.D. field.

公开(公告)号：DE69325774D1

公开(公告)日：1999-09-02

申请号：DE69325774

申请日：1993-11-09

Applicant: IBM

Inventor： NUMATA TSUTOMU ,  KIGAMI YUJI ,  SAKAI TATSUYA ,  SHIMIZU KENJI

IPC: G06F3/06 ,  G06F9/445 ,  G06F13/12 ,  G06F13/38 ,  G06F9/44

Abstract: A programmable external storage control apparatus is provided which requires minimum intervention of a microprocessor and has more extendibility and flexibility. It includes a buffer (16) which stores a data transfer control program in addition to data to be transferred between a host (10) and an external storage (14), a controller (18) which reads from the buffer (16) and executes the data transfer control programs, and a microprocessor (20) which starts reading of the program from the buffer (16) to the controller (18) in response to a command from the host (10). The controller (18) controls data transfer between the host and the external storage independently of the microprocessor (20) while the microprocessor (20) may execute other jobs.