公开(公告)号：US20020167753A1

公开(公告)日：2002-11-14

申请号：US09851886

申请日：2001-05-09

申请人： International Business Machines Corporation

发明人： Robert Beverley Basham ,  Alex Chliwnyj

IPC分类号： G11B005/584 ,  G11B005/09

CPC分类号： G11B5/584

摘要： A servo system and method for calibrating servo index positions of a magnetic tape for track following linear servo edges, each servo edge comprising an interface between dissimilar recorded servo signals, the edges on opposite lateral sides of a middle servo signal. A servo loop laterally positions a servo sensor where the servo signals are at estimated ratios representing the locations of the servo edges. An independent position sensor indicates the mechanical lateral position of the servo sensor at the sensed servo edges. The servo loop repositions the servo sensor to a plurality of lateral positions at predetermined displacements from the independent position sensor sensed servo edges, and track follows at each of the predetermined offsets. The ratio of the sensed servo signals is determined for each predetermined displacement, and a two dimensional, second order curve is fitted to the ratios with respect to the predetermined displacements to calibrate expected position error signals at the offset servo index positions. Memory is provided to store the calibration data in association with a tape and drive mechanism, for faster read access to tape data upon subsequent read operations of the tape.

摘要翻译： 一种用于校准用于跟踪线性伺服边缘的轨道的磁带的伺服索引位置的伺服系统和方法，每个伺服边缘包括不同记录的伺服信号之间的接口，中间伺服信号的相对侧面上的边缘。 伺服环路横向地定位伺服传感器，其中伺服信号处于表示伺服边缘位置的估计比率。 独立的位置传感器指示伺服传感器在检测到的伺服边缘的机械横向位置。 伺服环路将伺服传感器重新定位到来自独立位置传感器感测的伺服边缘的预定位移处的多个横向位置，并且跟踪在每个预定偏移处。 对于每个预定的位移，确定感测的伺服信号的比率，并且将二维二阶曲线拟合到相对于预定位移的比率，以校准偏移伺服指数位置处的预期位置误差信号。 提供存储器来存储与磁带和驱动机构相关联的校准数据，以便在磁带的后续读取操作时更快地读取磁带数据。

公开(公告)号：US20030128454A1

公开(公告)日：2003-07-10

申请号：US10035117

申请日：2002-01-04

申请人： International Business Machines Corporation

发明人： Robert Beverley Basham ,  Paul Merrill Greco

IPC分类号： G11B019/02

CPC分类号： G06F3/0601 ,  G06F2003/0697 ,  G11B19/02 ,  G11B27/002 ,  G11B27/329 ,  G11B2220/20 ,  G11B2220/2516 ,  G11B2220/41 ,  G11B2220/90

摘要： A data storage drive arranged as a plurality of logical accessors accesses data on a removable random access medium. Upon a write access for a data segment by a logical accessor, a control locks a context comprising at least one data segment of a partition to the logical accessor. The control concurrently allows read access to the data of the removable random access medium, except the locked context, and allows write access, except to the locked partition, by other logical accessors.

摘要翻译： 布置为多个逻辑存取器的数据存储驱动器访问可移动随机存取介质上的数据。 在由逻辑访问器对数据段进行写入访问时，控件将包含分区的至少一个数据段的上下文锁定到逻辑存取器。 除了锁定的上下文之外，该控制同时允许对可移动随机存取介质的数据的读取访问，并且允许除其他逻辑存取器之外的锁定分区之外的写访问。

公开(公告)号：US20030212700A1

公开(公告)日：2003-11-13

申请号：US10143204

申请日：2002-05-09

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Robert Beverley Basham

IPC分类号： G06F017/00

CPC分类号： G06F3/065 ,  G06F3/0613 ,  G06F3/0686 ,  Y10S707/99943

摘要： A nested translated extended copy function provides direct storage-to-storage copying with no data passing through the virtual controller. In one embodiment, a method for performing an extended copy operation on a physical drive reserved to a virtual controller comprises: receiving at least one extended copy command for copying from a device having extended copy capability; parsing the extended copy command; translating the extended copy command into at least one translated command; and sending the translated command to a physical drive having extended copy capability. In another embodiment, a method for performing an extended copy operation comprises translating at least one extended copy command into at least one translated command capable of execution by a physical drive having extended copy capability, wherein the physical drive is reserved to a virtual controller. A data storage system consistent with the invention comprises a server, a source device, a target device which is a virtual storage device, and a virtual storage appliance in communication with the server, source device, and target device. The virtual storage appliance is adapted to receive an extended copy command from the server for performing an extended copy operation from the source device, to parse the extended copy command, to build at least one translated command capable of execution by the target device, and to transmit the translated command to the target device.

摘要翻译： 嵌套的翻译扩展复制功能提供直接的存储到存储复制，没有数据通过虚拟控制器。 在一个实施例中，用于对保留给虚拟控制器的物理驱动器执行扩展复制操作的方法包括：从具有扩展复制能力的设备接收至少一个用于复制的扩展复制命令; 解析扩展拷贝命令; 将所述扩展复制命令转换成至少一个转换的命令; 并将转换的命令发送到具有扩展复制能力的物理驱动器。 在另一个实施例中，用于执行扩展复制操作的方法包括将至少一个扩展复制命令转换成能够由具有扩展复制能力的物理驱动器执行的至少一个翻译命令，其中物理驱动器被保留给虚拟控制器。 与本发明一致的数据存储系统包括服务器，源设备，作为虚拟存储设备的目标设备，以及与服务器，源设备和目标设备通信的虚拟存储设备。 虚拟存储设备适于从服务器接收扩展复制命令，用于从源设备执行扩展复制操作，解析扩展复制命令，以构建能够由目标设备执行的至少一个翻译命令，以及 将转换的命令发送到目标设备。

公开(公告)号：US20030050729A1

公开(公告)日：2003-03-13

申请号：US09948627

申请日：2001-09-10

申请人： International Business Machines Corporation

发明人： Robert Beverley Basham ,  Kirby Grant Dahman ,  Kenneth Fairclough Day III ,  Leonard George Jesionowski

IPC分类号： G06F007/00

CPC分类号： G06F3/0686 ,  G06F3/0605 ,  G06F3/0631 ,  G11B15/689

摘要： Data storage drives of an automated data storage library are allocated to received requests. A drive resource provider, upon receiving a request for a drive when all of the drives of the pool are allocated, holds any mount of a portable data storage cartridge relative to the request, releasing the hold when a drive is allocated. Spare drives are provided, outside of the pool. A spare drive may be allocated in response to the request, and a message is posted indicating use of the spare data storage drive. The posted message may comprise a notification that action may be taken to permanently transfer a spare data storage drive to the pool.