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    2.
    发明专利
    未知

    公开(公告)号：DE3381419D1

    公开(公告)日：1990-05-10

    申请号：DE3381419

    申请日：1983-09-23

    Applicant: IBM

    Inventor： HARTUNG MICHAEL HOWARD ,  NOLTA ARTHUR HERBERT ,  REED DAVID GORDON

    IPC: G06F13/10 ,  G06F3/06 ,  G06F12/08

    Abstract: A so-called "roll mode" technique provides block transfer with a disk-type of direct-access data-storage device (DASD). A set of chained commands for accessing record areas enables rapidly accessing a plurality of records within a given DASD cylinder of tracks. The rotational position of the surfaces is checked. The command within the chain, irrespective of its location, having the closest logical rotational proximity to the instant rotational position of the surfaces is selected as the first command in the chain. The chain is executed beginning at the indicated rotational position selected command through the end of the chain and then wrapped to the beginning of the original chain and continuing on until the command immediately preceding the rotational position selected command has been executed.

    Roll mode for cached data storage
    4.
    发明专利
    Roll mode for cached data storage 未知

    公开(公告)号：HK138594A

    公开(公告)日：1994-12-16

    申请号：HK138594

    申请日：1994-12-08

    Applicant: IBM

    Inventor： HARTUNG MICHAEL HOWARD ,  NOLTA ARTHUR HERBERT ,  REED DAVID GORDON

    IPC: G06F13/10 ,  G06F3/06 ,  G06F12/08

    Abstract: A so-called "roll mode" technique provides block transfer with a disk-type of direct-access data-storage device (DASD). A set of chained commands for accessing record areas enables rapidly accessing a plurality of records within a given DASD cylinder of tracks. The rotational position of the surfaces is checked. The command within the chain, irrespective of its location, having the closest logical rotational proximity to the instant rotational position of the surfaces is selected as the first command in the chain. The chain is executed beginning at the indicated rotational position selected command through the end of the chain and then wrapped to the beginning of the original chain and continuing on until the command immediately preceding the rotational position selected command has been executed.

    DATA PROCESSING APPARATUS INCLUDING A SELECTIVELY RESETTABLE PERIPHERAL SYSTEM
    8.
    发明专利
    DATA PROCESSING APPARATUS INCLUDING A SELECTIVELY RESETTABLE PERIPHERAL SYSTEM 未知

    公开(公告)号：DE3279221D1

    公开(公告)日：1988-12-22

    申请号：DE3279221

    申请日：1982-08-10

    Applicant: IBM

    Inventor： CHRISTIAN JOHN HUNT ,  NOLTA ARTHUR HERBERT ,  REED DAVID GORDON ,  RIECK RICHARD EDWARD ,  TAYLER GERALD ELLSWORTH ,  TRUAN TERRELL NELSON ,  WILLIAMS JOHN STEPHEN

    IPC: G06F11/14 ,  G06F12/08 ,  G06F13/00 ,  G06F13/12

    Abstract: The disclosed embodiment of a selectively resetable multiple device peripheral system, addressed logically by a host system (11), includes direct access storage devices (DASD) (18) which are connected to the host via a cache. (40). Each device can be independently addressed by any one of a plurality of addresses (16; 17), also termed logical devices and exposures (17). Since operations between DASD and cache are combined for all of the independent logical devices, resetting operations related to one independent logical device can inadvertently interfere with operations of another independent logical device. To maintain data integrity, a programmed controller accommodates logical device independence by using queues and control blocks relating to the DASD and logical devices, respectively scanning for interference of reset with non selected logical devices and forcing false completion on each such interfered with operation, including elimination from queues.

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