公开(公告)号：US08838905B2

公开(公告)日：2014-09-16

申请号：US13299054

申请日：2011-11-17

Applicant: Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

Inventor： Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

IPC: G06F12/00

CPC classification number: G11B21/025 ,  G06F12/126

Abstract: A storage controller that includes a cache, receives a command from a host, wherein a set of criteria corresponding to read response times for executing the command have to be satisfied. A destage application that destages tracks based at least on recency of usage and spatial location of the tracks is executed, wherein a spatial ordering of the tracks is maintained in a data structure, and the destage application traverses the spatial ordering of the tracks. Tracks are destaged from at least inside or outside diameters of disks at periodic intervals, while traversing the spatial ordering of the tracks, wherein the set of criteria corresponding to the read response times for executing the command are satisfied.

Abstract translation: 一种包括缓存的存储控制器，从主机接收命令，其中必须满足与用于执行命令的读取响应时间相对应的一组标准。 执行至少基于轨道的使用和空间位置的重新排列来追踪轨道的转移应用，其中，轨道的空间排序被保持在数据结构中，并且目的地应用遍历轨道的空间排序。 在穿过轨道的空间排序的同时，以周期性间隔从至少内部或外部直径的磁道中移动轨迹，其中满足与用于执行该命令的读取响应时间对应的一组标准。

公开(公告)号：US09262321B2

公开(公告)日：2016-02-16

申请号：US13299048

申请日：2011-11-17

Applicant: Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

Inventor： Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

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

CPC classification number: G06F12/0802 ,  G06F3/0611 ,  G06F3/0659 ,  G06F3/0689 ,  G06F12/126

Abstract: A storage controller that includes a cache receives a command from a host, wherein a set of criteria corresponding to read and write response times for executing the command have to be satisfied. The storage controller determines ranks of a first type and ranks of a second type corresponding to a plurality of volumes coupled to the storage controller, wherein the command is to be executed with respect to the ranks of the first type. Destage rate corresponding to the ranks of the first type are adjusted to be less than a default destage rate corresponding to the ranks of the second type, wherein the set of criteria corresponding to the read and write response times for executing the command are satisfied.

公开(公告)号：US20130132664A1

公开(公告)日：2013-05-23

申请号：US13299054

申请日：2011-11-17

Applicant: Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

Inventor： Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

IPC: G06F12/08

CPC classification number: G11B21/025 ,  G06F12/126

Abstract: A storage controller that includes a cache, receives a command from a host, wherein a set of criteria corresponding to read response times for executing the command have to be satisfied. A destage application that destages tracks based at least on recency of usage and spatial location of the tracks is executed, wherein a spatial ordering of the tracks is maintained in a data structure, and the destage application traverses the spatial ordering of the tracks. Tracks are destaged from at least inside or outside diameters of disks at periodic intervals, while traversing the spatial ordering of the tracks, wherein the set of criteria corresponding to the read response times for executing the command are satisfied.

Abstract translation: 一种包括缓存的存储控制器，从主机接收命令，其中必须满足与用于执行命令的读取响应时间相对应的一组标准。 执行至少基于轨道的使用和空间位置的重新排列来追踪轨道的转移应用，其中，轨道的空间排序被保持在数据结构中，并且目的地应用遍历轨道的空间排序。 在穿过轨道的空间排序的同时，以周期性间隔从至少内部或外部直径的磁道中移动轨迹，其中满足与用于执行该命令的读取响应时间对应的一组标准。

公开(公告)号：US5394280A

公开(公告)日：1995-02-28

申请号：US75622

申请日：1993-06-14

Applicant: Alex Chliwnyj ,  David C. Graves ,  Scott M. Fry ,  Pamela R. Nylander-Hill ,  Habib M. Torab ,  Will A. Wright

Inventor： Alex Chliwnyj ,  David C. Graves ,  Scott M. Fry ,  Pamela R. Nylander-Hill ,  Habib M. Torab ,  Will A. Wright

IPC: G11B20/12 ,  G11B5/008 ,  G11B5/584 ,  G11B15/04 ,  G11B15/087 ,  G11B20/18 ,  G11B21/08 ,  G11B5/09 ,  G11B5/596

CPC classification number: G11B21/088 ,  G11B15/04 ,  G11B15/087 ,  G11B5/00817 ,  G11B5/584

Abstract: A magnetic tape drive simultaneously senses on a magnetic tape three evenly spaced-apart servo track areas for servoing a multi-track magnetic head to follow a concurrent set of data tracks on the magnetic tape. The data tracks are arranged into a plurality of track groups. Each track group has a first and second subgroup of data tracks. The first subgroup of tracks are scanned in a first relative motion of the magnetic tape and magnetic head as a forward direction (tape is being spooled from a supply tape reel). The second subgroup of tracks are scanned in a second relative motion of the magnetic tape and magnetic head that is opposite in direction to the first relative direction and is a forward direction of scanning. While writing data in any one of the plural track groups, a servo dropout affecting most of the servo track areas is detected and indicated as a servo error. Writing is aborted. The relative position of the magnetic tape and head is detected at both longitudinal ends of the servo dropout. A servo dropout block (SDB), a tape control block, is written at each longitudinal end of the servo dropout only in the group of tracks in which data are being written. The tape space between the two SDBs is termed a limited portion of the tape in which no recording is permitted.

Abstract translation: 磁带驱动器同时在磁带上感测三个均匀间隔开的伺服磁道区域，用于伺服多轨磁头以跟随磁带上的一组数据轨道。 数据轨道被布置成多个轨道组。 每个轨道组具有第一和第二子数据轨道子组。 轨道的第一子组以磁带和磁头作为向前方向的第一相对运动扫描（磁带从供带卷轴卷绕）。 轨道的第二子组以与第一相对方向相反的磁带和磁头的第二相对运动扫描，并且是扫描的正向。 当在多个磁道组中的任何一个中写入数据时，检测到影响大多数伺服磁道区域的伺服压差，并将其表示为伺服误差。 写作中止。 在伺服脱落的两个纵向端处检测磁带和磁头的相对位置。 只有在正在写入数据的磁道组中，伺服压差块（SDB）（磁带控制块）被写入伺服压差的每个纵向端。 两个SDB之间的磁带空间被称为不允许记录的磁带的有限部分。

公开(公告)号：US5613082A

公开(公告)日：1997-03-18

申请号：US77478

申请日：1993-06-14

Applicant: Michael A. Brewer ,  Alex Chliwnyj ,  Dale A. Christiansen ,  James W. Wolf ,  Will A. Wright

Inventor： Michael A. Brewer ,  Alex Chliwnyj ,  Dale A. Christiansen ,  James W. Wolf ,  Will A. Wright

IPC: G06F3/06 ,  G11B5/008 ,  G11B15/02 ,  G11B20/12 ,  G11B20/18 ,  G11B23/36 ,  G11B27/00 ,  G11B27/10 ,  G11B27/11 ,  G11B27/13 ,  G11B27/28 ,  G11B27/32 ,  G11B27/36 ,  G06F9/26 ,  G06F9/34 ,  G06F12/00 ,  G06F12/02

CPC classification number: G06F3/0601 ,  G11B15/02 ,  G11B20/1205 ,  G11B20/1883 ,  G11B23/36 ,  G11B27/107 ,  G11B27/11 ,  G11B27/13 ,  G11B27/28 ,  G11B27/328 ,  G11B27/36 ,  G11B5/00817 ,  G06F2003/0698 ,  G11B2220/41 ,  G11B2220/65 ,  G11B2220/90 ,  G11B2220/95

Abstract: A data storage system includes a data storage medium, such as a magnetic tape, that has a first control data storing area or drive partition that is addressable only by a peripheral drive mounting the medium and a plurality of other addressable data storing partitions for storing data. A volume table of contents may be stored in one of the addressable partitions. A tachometer measures and indicates physical locations on the storage medium. Each of the partitions have an extent on the storage medium indicated by said physical locations. The control data in the drive partition includes directories of medium control blocks, such as tape marks, defect marks and the like; directory of all addressable partitions including the physical locations at the beginning of each partitions and other medium physical and logical parameter data. A so-called mount-demount medium control block in the drive partition indicates a demount status that shows all data stored in the drive partition is valid. Loading a storage medium into a drive does not mount the drive for recording and reading. First, a copy of the drive partition stored data is copied to a memory in the peripheral drive and the mount-demount medium control block is marked to indicate the storage medium is mounted. Then, the peripheral drive can indicate to an attaching unit that the storage medium is mounted for use in data processing activities.

Abstract translation: 数据存储系统包括诸如磁带的数据存储介质，其具有只能由安装介质的外围驱动器寻址的第一控制数据存储区域或驱动器分区以及用于存储数据的多个其他可寻址数据存储分区 。 内容卷可以存储在可寻址分区之一中。 转速计测量并指示存储介质上的物理位置。 每个分区在由所述物理位置指示的存储介质上具有范围。 驱动器分区中的控制数据包括诸如磁带标记，缺陷标记等介质控制块的目录; 所有可寻址分区的目录，包括每个分区开始处的物理位置和其他中等物理和逻辑参数数据。 驱动器分区中的所谓安装拆卸介质控制块表示显示驱动器分区中存储的所有数据有效的卸载状态。 将存储介质加载到驱动器中不会安装用于记录和读取的驱动器。 首先，将驱动器分区存储的数据的副本复制到外围驱动器中的存储器，并且装载 - 拆卸介质控制块被标记以指示存储介质被安装。 然后，外围驱动器可以向附着单元指示存储介质被安装用于数据处理活动。

公开(公告)号：US20130132667A1

公开(公告)日：2013-05-23

申请号：US13299048

申请日：2011-11-17

Applicant: Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

Inventor： Michael T. Benhase ,  Lokesh M. Gupta ,  Christopher J. Strauss ,  Will A. Wright

IPC: G06F12/08

CPC classification number: G06F12/0802 ,  G06F3/0611 ,  G06F3/0659 ,  G06F3/0689 ,  G06F12/126

Abstract: A storage controller that includes a cache receives a command from a host, wherein a set of criteria corresponding to read and write response times for executing the command have to be satisfied. The storage controller determines ranks of a first type and ranks of a second type corresponding to a plurality of volumes coupled to the storage controller, wherein the command is to be executed with respect to the ranks of the first type. Destage rate corresponding to the ranks of the first type are adjusted to be less than a default destage rate corresponding to the ranks of the second type, wherein the set of criteria corresponding to the read and write response times for executing the command are satisfied.