公开(公告)号：WO1992022865A1

公开(公告)日：1992-12-23

申请号：PCT/US1992003653

申请日：1992-05-01

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  BELSAN, Jay, Stuart ,  LUDLAM, Henry, Southworth ,  RUDESEAL, George, Arthur

IPC: G06F11/16

CPC classification number: G06F11/1076 ,  G06F3/0601 ,  G06F11/1008 ,  G06F11/2005 ,  G06F11/2087 ,  G06F11/2094 ,  G06F2003/0692 ,  G06F2201/815 ,  G11B20/1833 ,  G11C29/74 ,  G11C29/88

Abstract: This apparatus (100) makes use of a disk drive array to store the data records for the associated host processor (11, 12). This disk drive array emulates the operation of a large form factor disk drive by using a plurality of interconnected small form factor disk drives (12*-*). These small form factor disk drives (12*-*) are configured into redundancy groups (421-428), each of which contains n+m disk drives for storing data records and redundancy information thereon. The use of this configuration is significantly more reliable than a large form factor disk drive. However, in order to maintain compatibility with host processors (11, 12) that request the duplex copy group feature, the pantom duplex copy group apparatus of the present invention mimics the creation of a duplex copy group in this dynamically mapped data storage subsystem (100) using a disk array and a phantom set of pointers (414) that mimic the data storage devices (421) on which the data records are stored.

公开(公告)号：WO1991006053A1

公开(公告)日：1991-05-02

申请号：PCT/US1990005484

申请日：1990-09-26

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  BELSAN, Jay, Stuart ,  MILLIGAN, Charles, Allen

IPC: G06F12/00

CPC classification number: G06F3/0601 ,  G06F2003/0691

Abstract: The multiple step data read apparatus provides a buffer memory (108-0) for each read/write head (110-0) in the rotating media (111-0) data storage system that can store up to the entire track (400) of data that includes the requested data (Sectors 2-6). The data is fragmented such that the data transferred into the read/write head buffer (207) first is transmitted to the control unit (104) first whether or not that data is at the beginning of the data requested by the control unit (104). The data is further fragmented such that critical portions of the data are available to the control unit (104) to satisfy the host request as soon as the data is read from the device. This fragmenting results in the data becoming available to the control unit (104) in the mininum time possible and the performance of the subsystem (120) being the maximum possible. In addition each data fragment transfer to the control unit (104) is initiated a predetermined time before the end of the fragment of data such that the read/write head (110-0) reaches the end of the fragment the same time that the last sector of the fragment is transmitted to the control unit (104).

Abstract translation: 多步数据读取装置为旋转介质（111-0）数据存储系统中的每个读/写头（110-0）提供缓冲存储器（108-0），其可以存储直到整个轨道（400）的 数据包含所请求的数据（扇区2-6）。 数据被分段，使得首先将传送到读/写头缓冲器（207）的数据首先发送到控制单元（104），无论该数据是否处于由控制单元（104）请求的数据的开头， 。 数据被进一步分段，使得数据的关键部分一旦可以从控制单元（104）获得，以便一旦从设备读取数据就满足主机请求。 这种碎片导致数据在最短时间内变得可用于控制单元（104），并且子系统（120）的性能是最大可能的。 此外，每个数据片段传送到控制单元（104）在数据片段结束之前的预定时间开始，使得读/写头（110-0）到达片段的末端，同时最后 片段的扇区被发送到控制单元（104）。

公开(公告)号：WO1992014208A1

公开(公告)日：1992-08-20

申请号：PCT/US1992000967

申请日：1992-02-04

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  WALSH, Robert ,  RUDESEAL, George, Arthur ,  BELSAN, Jay, Stuart

IPC: G06F11/16

CPC classification number: G06F11/2094 ,  G06F3/0601 ,  G06F11/2097 ,  G06F2003/0692 ,  G11B20/18 ,  G11C29/70 ,  G11C29/74

Abstract: The data storage subsystem (100) is implemented using an array of data storage elements (122-* to 125-*) which vary in data storage characteristics and/or data storage capacity. Control apparatus (101) automatically compensates for any nonuniformity among the data storage elements (122-* to 125-*) by selecting a set of physical characteristics that define a common data storage element format. The selected set of physical characteristics may not match any of the disk drives (122-1 to 122-n+m) but each disk drive (122-1 to 122-n+m) can emulate these selected characteristics. This capability enables the disk drives (122-* to 125-*) in the data storage subsystem (100) to be replaced by nonidentical disk drives in a nondisruptive manner to provide continuous data availability.

Abstract translation: 使用在数据存储特性和/或数据存储容量上变化的数据存储元件（122- *至125- *）阵列来实现数据存储子系统（100）。 控制装置（101）通过选择定义公用数据存储单元格式的一组物理特性来自动补偿数据存储单元（122- *〜125- *）中的任何不均匀性。 所选择的一组物理特性可能不匹配任何磁盘驱动器（122-1至122-n + m），但是每个磁盘驱动器（122-1至122-n + m）可以模拟这些所选择的特性。 此功能使得数据存储子系统（100）中的磁盘驱动器（122- *至125- *）能够以非中断方式替换为非同一磁盘驱动器，以提供连续的数据可用性。

公开(公告)号：WO1992009035A1

公开(公告)日：1992-05-29

申请号：PCT/US1991007645

申请日：1991-10-18

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  BELSAN, Jay, Stuart

IPC: G06F12/00

CPC classification number: G06F3/0601 ,  G06F12/0866 ,  G06F2003/0697 ,  G06F2212/312 ,  G11C29/76

Abstract: The disk drive array data storage subsystem (100) functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives (122*). The data storage subsystem (100) does not modify data stored in a redundancy group but simply writes the modified data as a new record in available memory space on another redundancy group. The original data is flagged as obsolete. Virtual tracks that are least used are migrated as part of a free space collection process to low access cylinders, which are, in turn, migrated to secondary media, such as magnetic tape (10*). The migration process is either periodic or demand driven to automatically archive little used data records.

公开(公告)号：EP0494999B1

公开(公告)日：1998-01-21

申请号：EP90916622.5

申请日：1990-09-26

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： BELSAN, Jay, Stuart ,  MILLIGAN, Charles, Allen

IPC: G06F3/06

CPC classification number: G06F3/0601 ,  G06F2003/0691

Abstract: The multiple step data read apparatus provides a buffer memory (108-0) for each read/write head (110-0) in the rotating media (111-0) data storage system that can store up to the entire track (400) of data that includes the requested data (Sectors 2-6). The data is fragmented such that the data transferred into the read/write head buffer (207) first is transmitted to the control unit (104) first whether or not that data is at the beginning of the data requested by the control unit (104). The data is further fragmented such that critical portions of the data are available to the control unit (104) to satisfy the host request as soon as the data is read from the device. This fragmenting results in the data becoming available to the control unit (104) in the mininum time possible and the performance of the subsystem (120) being the maximum possible. In addition each data fragment transfer to the control unit (104) is initiated a predetermined time before the end of the fragment of data such that the read/write head (110-0) reaches the end of the fragment the same time that the last sector of the fragment is transmitted to the control unit (104).

公开(公告)号：EP1012721B1

公开(公告)日：2001-07-11

申请号：EP98915554.4

申请日：1998-04-15

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： BELSAN, Jay, Stuart ,  MILILLO, Michael, Steven ,  O'BRIEN, John, Timothy

IPC: G06F11/14

CPC classification number: G06F11/1435 ,  G06F2201/84

Abstract: The present data file storage management system for snapshot copy operations maintains a two level mapping table which enables the data files to be copied using the snapshot copy process and only having to update a single corresponding mapping table entry when the physical location of the data file is changed. The snapshot copy updates to the contents of the first level of the two level mapping table are stored on the backend data storage devices to provide a record of the snapshot copy operation which can be used to recover the correct contents of the mapping table. This record of the snapshot copy operations remains valid even though the physical location of a copied data file instance is subsequently changed. Furthermore, the physical storage space holding the updated portions of the first level of the two level mapping table can be managed using techniques like those used to manage the physical storage space holding data file instances. Mapping table updates resulting from the snapshot copy operation are delayed until all mapping table updates resulting from earlier data file write operations have been completed and any attempt to update the mapping table to reflect data written to the original data file or the copy data file that occurs after initiation of the copy must wait until the first set of mapping table pointers has been copied.

公开(公告)号：EP0494999A1

公开(公告)日：1992-07-22

申请号：EP90916622.0

申请日：1990-09-26

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： BELSAN, Jay, Stuart ,  MILLIGAN, Charles, Allen

IPC: G06F3

CPC classification number: G06F3/0601 ,  G06F2003/0691

Abstract: L'appareil de lecture de données à étapes multiples prévoit une mémoire-tampon (108-0) pour chaque tête de lecture/écriture (110-0) se trouvant dans le système de stockage de données à supports rotatifs (111-0), pouvant stocker jusqu'à l'intégralité de la piste (400) de données comprenant les données requises (secteurs 2 à 6). Les données sont fragmentées de sorte que les données transférées dans le tampon (207) de la tête de lecture/écriture, sont premièrement transmises à l'unité de commande (104), que ces données se trouvent ou ne se trouvent pas au début des données requises par l'unité de commande (104). Les données sont fragmentées davantage, de sorte que les parties critiques des données sont disponibles à ladite unité de commande (104), afin de satisfaire la demnande de l'ordinateur central, dès que les données sont lues à partir du dispositif. Cette fragmentation a pour résultat de rendre les données disponibles à l'unité de commande (104), dans le temps minimum possible, et de maximiser l'efficacité du sous-système (120). De plus chaque transfert de fragments de données à l'unité de commande (104), est déclenché à un temps prédéterminé avant la fin du fragment de données, de sorte que la tête de lecture/écriture (110-0) atteint la fin du fragment en même temps que le dernier secteur du fragment est transmis à l'unité de commande (104).

公开(公告)号：EP1012721A1

公开(公告)日：2000-06-28

申请号：EP98915554.4

申请日：1998-04-15

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： BELSAN, Jay, Stuart ,  MILILLO, Michael, Steven ,  O'BRIEN, John, Timothy

IPC: G06F11/14

CPC classification number: G06F11/1435 ,  G06F2201/84

Abstract: The present data file storage management system for snapshot copy operations maintains a two level mapping table which enables the data files to be copied using the snapshot copy process and only having to update a single corresponding mapping table entry when the physical location of the data file is changed. The snapshot copy updates to the contents of the first level of the two level mapping table are stored on the backend data storage devices to provide a record of the snapshot copy operation which can be used to recover the correct contents of the mapping table. This record of the snapshot copy operations remains valid even though the physical location of a copied data file instance is subsequently changed. Furthermore, the physical storage space holding the updated portions of the first level of the two level mapping table can be managed using techniques like those used to manage the physical storage space holding data file instances. Mapping table updates resulting from the snapshot copy operation are delayed until all mapping table updates resulting from earlier data file write operations have been completed and any attempt to update the mapping table to reflect data written to the original data file or the copy data file that occurs after initiation of the copy must wait until the first set of mapping table pointers has been copied.

公开(公告)号：EP0570516A1

公开(公告)日：1993-11-24

申请号：EP92906793.0

申请日：1992-02-04

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： WALSH, Robert ,  RUDESEAL, George, Arthur ,  BELSAN, Jay, Stuart

IPC: G06F3 ,  G06F11 ,  G11B20 ,  G11C29

CPC classification number: G06F11/2094 ,  G06F3/0601 ,  G06F11/2097 ,  G06F2003/0692 ,  G11B20/18 ,  G11C29/70 ,  G11C29/74

Abstract: On réalise le sous-système de stockage de données décrit (100) en utilisant un groupement d'éléments de stockage de données (122-* à 125-*), dont les caractéristiques de stockage des données et/ou la capacité de stockage des données sont variables. L'appareil de commande (101) compense automatiquement toute absence d'uniformité parmi les éléments de stockage de données (122-* à 125-*) en sélectionnant un ensemble de caractéristiques physiques qui définissent un format commun d'éléments de stockage de données. L'ensemble de caractéristiques physiques sélectionné peut ne pas correspondre à toutes les unités de disques (122-1 à 122-n+m), mais chaque unité de disques (122-1 à 122-n+m) peut égaler par la technique de l'émulation ces caractéristiques sélectionnées. Cette capacité permet aux unités de disques (122-* à 125-*) contenues dans le sous-système de stockage de données (100) d'être remplacées par des unités de disques non identiques selon un mode non interrompu pour assurer une disponibilité des données en continu.