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.

公开(公告)号：DE3279135D1

公开(公告)日：1988-11-24

申请号：DE3279135

申请日：1982-07-14

Applicant: IBM

Inventor： CHRISTIAN JOHN HUNT ,  HARTUNG MICHAEL HOWARD ,  NOLTA ARTHUR ,  REED DAVID GORDON ,  RIECK RICHARD EDWARD ,  WILLIAMS JOHN STEPHEN

IPC: G06F12/08 ,  G06F12/12

公开(公告)号：DE3278773D1

公开(公告)日：1988-08-18

申请号：DE3278773

申请日：1982-08-25

Applicant: IBM

Inventor： DUKE ALAN HERSCHEL ,  HARTUNG MICHAEL HOWARD ,  MARSCHNER FREDERICK JAMES

IPC: G06F3/06 ,  G06F12/08 ,  G06F12/12 ,  G06F13/00

Abstract: In a storage subsystem hierarchy, promotion of data from a backing store (14) to a cache (15) is restricted based upon status of the cache and activity of a last or highest storage reference. Observed writing activity selectively inhibits data promotion. Data promotion occurs after completion of a series of storage access requests.

公开(公告)号：DE3278678D1

公开(公告)日：1988-07-21

申请号：DE3278678

申请日：1982-07-23

Applicant: IBM

Inventor： HARTUNG MICHAEL HOWARD ,  RIECK RICHARD EDWARD ,  TAYLER GERALD ELLSWORTH

IPC: G06F12/08 ,  G06F11/10 ,  G06F12/02 ,  G06F12/16 ,  G11C7/00

Abstract: in a data storage system employing sequential data transfers for blocks of data bytes, an address offset is induced in the addressing mechanism such that each block (21) transfer requires loading the address mechanism with an address of a block to be accessed. Address offset is preferably induced by inserting a blank register (27), which may be preceded by an error correction/detection word (22), between adjacent blocks.

公开(公告)号：DE69312781T2

公开(公告)日：1998-02-12

申请号：DE69312781

申请日：1993-04-13

Applicant: IBM

Inventor： COHN ODED ,  HARTUNG MICHAEL HOWARD ,  MICKA WILLIAM FRANK ,  MCCAULEY JOHN NORBERT ,  MIKKELSEN CLAUS WILLIAM ,  NAGIN KENNETH MICHAEL ,  NOVICK YORAM ,  WINOKUR ALEXANDER

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/14 ,  G06F12/00 ,  G06F12/16

Abstract: A method and system disclosed for enhanced efficiency of backup copying of designated datasets stored within storage devices (61) coupled to the data processing system via a storage control unit (65) having memory (66) therein. Application execution is temporarily suspended to form a dataset logical-to-physical address concordance to be utilized to administer backup copying. Application initiated updates to uncopied portions of the designated datasets are temporarily deferred until sidefiles of the affected portions are written to memory (66). Portions of the designated datasets are then accessed and copied utilizing selected data retrieval command sequences. A sidefile status query is appended to said command sequences and the presence of data within memory (66) is determined. The sidefiles are then accessed and copied to alternate storage locations in a backup copy order defined by the address concordance.

公开(公告)号：DE3381819D1

公开(公告)日：1990-09-20

申请号：DE3381819

申请日：1983-09-20

Applicant: IBM

Inventor： HARTUNG MICHAEL HOWARD

IPC: G06F12/08

Abstract: Data supplied to a data storage system by a host processor has a first or second use status. The first use status is that the supplied data is to be retentively stored in the data storage system. The second use status is that the supplied data is exempted from the retentive storage requirement. An example of exempted second use status is data only temporarily stored in the data storage system, i.e. transitory data. A second example is data that is being manipulated prior to retentive storage, i.e. data that is temporarily volatile. Termination of the exempted second use status results in either discard or a retentive storage of the exempted second use status data. Data integrity controls for the exempted second use status data are described. The invention is described for a data storage hierarchy environment having a volatile cache and a magnetic recorder as a backing store. The exempted second use status data need be stored only in or primarily in the cache while retentative data is primarily stored in the retentive store and selectively in the cache.

公开(公告)号：DE3279161D1

公开(公告)日：1988-12-01

申请号：DE3279161

申请日：1982-08-25

Applicant: IBM

Inventor： BASTIAN ARLON LEWIS ,  GOLDFEDER MARC ETHAN ,  HARTUNG MICHAEL HOWARD

IPC: G06F12/08 ,  G06F13/00

Abstract: A storage hierarchy has a backing store (14) and a cache (15). During a series of accesses to the hierarchy by a user (10) write commands are monitored and analysed. Writing data to the hierarchy results in data being selectively removed from the cache. Space in the cache not being allocated to data being written, results in such data being written to the backing store to the exclusion of the cache. Writing as part of a chain or sequential set of commands causes further removal of the data from the cache at the end of the chain or sequence. Removal of data increases the probability of writing data directly to the backing store with data readings from the cache.

公开(公告)号：AU548748B2

公开(公告)日：1986-01-02

申请号：AU8867382

申请日：1982-09-24

Applicant: IBM

Inventor： DUKE ALAN HERSCHEL ,  HARTUNG MICHAEL HOWARD ,  MARSCHNER FREDERICK JAMES ,  NOLAN KENNETH PATRICK

IPC: G06F3/06 ,  G06F12/08 ,  G06F13/00

Abstract: A storage subsystem hierarchy has a caching buffer (15) and a backing store (14); the backing store preferably having a disk-type data-storage apparatus. A directory indicates data stored in the caching buffer. Upon a data-storage access, read or write, within a series of such accesses, resulting in a cache miss, all subsequent data storage accesses in the series are made to the the backing store to the exclusion of the caching buffer even though the caching buffer has storage space allocated for such a data transfer. Selected limits are placed on the series to the backing store, such as receiving on end of series (end of command chain) indication from a using unit, crossing DASD cylinder boundaries, receiving an out of bounds address or receiving certain device oriented commands.

公开(公告)号：DE2841047A1

公开(公告)日：1979-04-12

申请号：DE2841047

申请日：1978-09-21

Applicant: IBM

Inventor： HARTUNG MICHAEL HOWARD ,  ISKIYAN JAMES LINCOLN ,  ROBERTS JAMES GARFIELD ,  TENNISON ROBERT DOUGLAS

IPC: G06F3/06 ,  G06F11/08 ,  G06F11/30 ,  G06F13/00 ,  G08C25/02 ,  G11B20/18 ,  G11B5/86 ,  G06F3/04 ,  G06F11/00

公开(公告)号：DE69204143D1

公开(公告)日：1995-09-21

申请号：DE69204143

申请日：1992-11-13

Applicant: IBM

Inventor： HARTUNG MICHAEL HOWARD ,  SINGH SHANKER ,  WADE FORREST LEE

IPC: G06F12/08 ,  G06F1/26 ,  G06F11/20 ,  G06F12/16 ,  G11C5/14

Abstract: Combination of split memory modules, each module partitioned into a first section and a second section. Each module has its own power source (101, 103) so that the failure of a single power source will not affect the other modules. A particular block of data is not stored in both sections of a single module. Each modified block of data is stored in the first section of one module and the second section of a different module. Failure of a power supply will not cause a loss in data since the modified data is also stored in a section of a module not powered by the same power supply. The failure of all power supplies will not result in the loss of any data if either the first or second section of the memory modules is non-volatile, i.e., backed up, usually by battery sources.