公开(公告)号：JP2001118335A

公开(公告)日：2001-04-27

申请号：JP29290899

申请日：1999-10-14

Applicant: IBM

Inventor： SATO MASAHIKO ,  ASANO HIDEO

IPC: H04N5/765 ,  G11B5/012 ,  G11B20/10 ,  G11B27/10 ,  G11B27/30 ,  H04N5/76 ,  H04N5/781

Abstract: PROBLEM TO BE SOLVED: To provide a data recording and reproducing method that is suitable for recording and reproducing AV data on/from a hark disk and the other randomly accessible recording media. SOLUTION: Two streams being a stream #1 and a stream #2 are set. And 2000 sectors are set about the stream #1, and 4000 sectors are set about the stream #2. AV stream data recorded on the hard disk can be accessed by specifying the AV stream number (#1 or #2) and an AV stream LBA. The AV stream LBA starts from 0(zero) and completes at the maximum AV stream LBA of each stream about each AV stream. For instance, the stream #1 ranges from 1 to 1999, and also, the stream #2 ranges from 0 to 3999.

公开(公告)号：JPH11213356A

公开(公告)日：1999-08-06

申请号：JP361698

申请日：1998-01-12

Applicant: IBM

Inventor： TANAKA HIDETSUGU ,  HARADA YOSHINAO ,  SATO MASAHIKO ,  SATO TAKUMI

IPC: G11B5/10 ,  G11B5/31 ,  G11B5/41 ,  G11B5/60 ,  G11B21/00

Abstract: PROBLEM TO BE SOLVED: To provide a method to remove a deposit stuck to the head of an information recording and reproducing device. SOLUTION: A step 102 where the head read/write operation is stopped, a step 106 for amplitude selection, steps 108 and 110 where the seek operation is repeated with the selected amplitude, a step 116 where this amplitude is changed, steps 108 and 110 where the seek operation is repeatedly performed with the changed amplitude, and a step 114 where the amplitude is repeated I successively changed to repeatedly perform the seek operation are provided. In the operating information recording and reproducing device, a deposit stuck to the head which reads and writes data in and from a rotating disk recording medium is removed.

公开(公告)号：JP2002190184A

公开(公告)日：2002-07-05

申请号：JP2001286214

申请日：2001-09-20

Applicant: IBM

Inventor： ASANO HIDEO ,  COLEGROVE DANIEL JAMES ,  KIBASHI AKIRA ,  SATO MASAHIKO

IPC: H04N5/93 ,  G01V7/00 ,  G11B19/00 ,  G11B20/10 ,  G11B21/00 ,  G11B27/00 ,  G11B27/10 ,  H04N21/432 ,  H04N21/433 ,  H04N21/443 ,  H04N21/472

Abstract: PROBLEM TO BE SOLVED: To provide a method for realizing a stream link in a voice/image disk medium and a device for the method. SOLUTION: A voice/image stream is set up in a disk drive device, and consecutive data are accessed with a read command and a write command. When a main stream which has been established exists, the stream link is established by sending to the disk drive device a request for the stream link provided with the number of the main stream. A new stream takes over the starting address and ending address of the main stream. When the pointer of a linked stream gets ahead of the pointer of the main stream, a pointer-overrun warning is set.

公开(公告)号：JP2001118346A

公开(公告)日：2001-04-27

申请号：JP29290999

申请日：1999-10-14

Applicant: IBM

Inventor： TAKEUCHI MASAYUKI ,  SATO MASAHIKO

IPC: G11B21/08 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To provide a disk drive device capable of suppressing the generation of noise in the case of recording and reproducing AV data and its controlling method. SOLUTION: This device sets an actuator control condition corresponding to the seek distance of a magnetic head, decides a distance when the magnetic head actually seeks and controls the actuator with the control condition corresponding the distance by controlling the seek of the magnetic head in the case of reading information recorded on a magnetic disk or writing information on the magnetic disk. For instance, the control shown in the diagram S1 is executed in the case of short stroke seek, the control shown in the diagram S2 is executed in the case of middle stroke seek, and the control shown in the diagram S3 is carried out in the case of long stroke seek.

公开(公告)号：JPH1145157A

公开(公告)日：1999-02-16

申请号：JP19872897

申请日：1997-07-24

Applicant: IBM

Inventor： SATO MASAHIKO ,  KAKIHARA TOSHIO ,  KANAMARU ATSUSHI ,  OSHIKAWA HIROSHI ,  ASANO HIDEO

IPC: G06F3/06 ,  G06F13/38 ,  G11B20/10 ,  G11B27/10

Abstract: PROBLEM TO BE SOLVED: To permit high-reliability data transfer and a minimum throughput decrease by controlling data transfer to a 2nd data transfer speed slower than a 1st data transfer speed once an error detecting means detects a specific error. SOLUTION: A hard disk drive(HDD) is equipped with a hard disk controller 105A which controls operation for reading and writing data out of and to a magnetic disk 101 and an MPU 106 which controls the operation of the whole HDD. To transfer data from the HDD 100 to a host 200, the 1st data transfer speed is set first and the data are transferred from the HDD to the host 200 at the 1st data transfer speed. If a specific error is detected in the transferred data, the data transfer speed is changed to the 2nd transfer speed slower than the 1st transfer speed. Consequently, the state of the IDEI/FBus can be known by monitoring the status of the existent CRC error, so high-reliability data transfer for reading can be performed only by alterations of the drive side.

公开(公告)号：JP2001222474A

公开(公告)日：2001-08-17

申请号：JP2000029103

申请日：2000-02-07

Applicant: IBM

Inventor： OSHIKAWA HIROSHI ,  SAKAI TATSUYA ,  ASANO HIDEO ,  SATO MASAHIKO

IPC: G06F3/00 ,  G06F13/00 ,  G06F13/38 ,  H03K19/0175 ,  H03K19/0185 ,  H04L1/00 ,  H04L25/02

Abstract: PROBLEM TO BE SOLVED: To realize a high signal integrity at all settable data transfer speeds. SOLUTION: A signal output device capable of setting up plural different data transfer speeds and outputting a signal to a signal receiver at a certain set data transfer speed via an ATA cable 2 is provided with a driver circuit 53 capable of setting up plural different through rates and outputting the signal to the ATA cable 2 at a through rate set in accordance with a through rate control signal SRC and a control means for setting up the through rate of the driver circuit 53 in accordance with the set data transfer speed.

公开(公告)号：JPH10255403A

公开(公告)日：1998-09-25

申请号：JP5775197

申请日：1997-03-12

Applicant: IBM

Inventor： KAKIHARA TOSHIO ,  KANAMARU ATSUSHI ,  SATO TAKUMI ,  SATO MASAHIKO

IPC: G06F3/06 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B27/36

Abstract: PROBLEM TO BE SOLVED: To reduce the error processing time during a reset, by executing a first error recovering processing while controlling a write controlling means if a writing error is detected and executing a second error recovering processing, which is small in the number of execution commands than an error recovering processing(ERP), while controlling the means if a reset instruction is detected. SOLUTION: If a reset is requested, a control section 3 does not execute the ERP, the selector being selected is assumed to be defective, the temporary registration processing of the defective sector is conducted, the assignment of a spare sector is made and the updating of a reassigned table is executed. In the normal ERP having no reset request, many processings are repeated from such a judgement that is not a reset, up to the judgement of an error recovering impossible. Thus, the number of steps, which are actually to be executed, becomes extremely large. Therefore, the time required to execute the processings greatly differs for between the case of a reset is requested and the case in which no request is made for a reset.