公开(公告)号：DE112010004369B4

公开(公告)日：2018-02-15

申请号：DE112010004369

申请日：2010-08-02

Applicant: IBM

Inventor： KATAGIRI TAKASHI ,  NAKAYAMA HIROKAZU ,  OISHI YUTAKA ,  YOSHIMURA KATSUMI ,  NAGURA HIRONOBU ,  ABE ATSUSHI

IPC: G11B20/10 ,  G11B5/008 ,  G11B5/09 ,  G11B15/087 ,  G11B15/20

Abstract: Vorrichtung zum Steuern des Schreibvorgangs von Daten auf ein Bandmedium, wobei die Vorrichtung Folgendes umfasst: eine Speichereinheit (45), die Betriebsart-Daten speichert, die eine Betriebsart der Vorrichtung angeben; und eine Entscheidungseinheit (44), die entscheidet, ein Ziel-Speichervermögen von Daten auf das Bandmedium zu schreiben, wenn die in der Speichereinheit (45) gespeicherten Betriebsart-Daten eine bestimmte Betriebsart angeben, wobei das Ziel-Speichervermögen als das Nennspeichervermögen vermindert um ein Datenspeichervermögen berechnet wird, das durch die Ausführung von Schreiben ohne Rückpositionierung verloren geht. wobei, falls das Ziel-Speichervermögen von Daten auf das Bandmedium geschrieben werden soll, die Entscheidungseinheit (44) festlegt, keine Rückpositionierung nach dem Schreiben von ersten Daten auf das Bandmedium auszuführen, bis die zweiten Daten neben den ersten Daten auf das Bandmedium geschrieben werden und, wobei, falls eine Lese-Datenrate von dem Bandmedium eine Ziel-Lesedatenrate erreichen soll, die Entscheidungseinheit (44) festlegt, keine Rückpositionierung nach dem Schreiben der ersten Daten auf das Bandmedium auszuführen, bis die zweiten Daten auf das Bandmedium geschrieben werden.

公开(公告)号：GB2488932A

公开(公告)日：2012-09-12

申请号：GB201209656

申请日：2010-09-28

Applicant: IBM

Inventor： MORI YUHKO ,  KATAGIRI TAKASHI ,  OISHI YUTAKA

IPC: G11B15/20 ,  G11B15/26 ,  G11B20/10

Abstract: Disclosed is a tape drive controller (16) that improves data writing performance without impairing the achievement of target data reading rates. When a command processing unit (41) receives a synchronization command, a buffer administration unit (42) hands off data within a buffer to a channel I/O unit (43), and the writing of the data to tape is completed, a backhitch determination unit (44) determines whether to backhitch the tape. If the determination to backhitch the tape is made, a speed setting unit (46) sets a tape speed such that the sum of the time required to write data wherein the backhitch is not involved and the time required to write data wherein the backhitch is involved is the minimum such time, with respect to a range wherein a quantity of data used for purposes of monitoring the achievement of target data read rates is written to the tape. An operation signal output unit (49) instructs that the tape speed be changed to the tape speed thus set, after the tape has been backhitched.

公开(公告)号：GB2488689A

公开(公告)日：2012-09-05

申请号：GB201208355

申请日：2010-08-02

Applicant: IBM

Inventor： NAKAYAMA HIROKAZU ,  OISHI YUTAKA ,  YOSHIMURA KATSUMI ,  NAGURA HIRONOBU ,  ABE ATSUSHI ,  KATAGIRI TAKASHI

IPC: G11B5/008 ,  G11B15/20 ,  G11B20/10

Abstract: Provided are a device and method for controlling writing of data, whereby a target amount of data is written to a tape medium, said target amount being a nominal capacity minus an amount of capacity lost by not backhitching. In the provided tape drive controller (16), when a command processing unit (41) receives a synchronization command, a buffer management unit (42) hands over data from a buffer to a channel I/O unit (43), and a write to a tape finishes, a backhitch determination unit (44) then determines whether the following conditions are fulfilled: information indicating a high-data-rate mode is stored in a mode information storage unit (45); of a nominal capacity, it is possible to write a target amount of data to the tape, said target amount being stored in a target amount storage unit (46); and it is possible to read the written data at a target read-out data rate. An operation signal output unit (48) gives an instruction to backhitch only in the case in which it is determined that the aforementioned conditions are not fulfilled.

公开(公告)号：JP2009289349A

公开(公告)日：2009-12-10

申请号：JP2008142014

申请日：2008-05-30

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： OE TOKO ,  KATAGIRI TAKASHI

IPC: G11B20/10 ,  G11B15/02

CPC classification number: G11B5/584 ,  G11B15/473

Abstract: PROBLEM TO BE SOLVED: To prevent a backhitch at the time of synchronization, when a transaction size is large and reduction of performance by a backhitch generated by vacancy of a buffer. SOLUTION: In a controller 16 of a tape drive, when a command processing part 41 receives a synchronization command and a buffer management part 42 delivers data in a buffer to a channel input and output part 43 to complete writing to a tape, a backhitch determining part 44 determines whether backhitchless writing is performed, from a viewpoint of whether nominal volume of data can be finally written in the tape. When it is determined that backhitchless writing is performed, a speed determining part 45 determines the tape speed such that data writing time from the buffer to the tape is longer than data transfer time from a host to the buffer; and an operation signal outputting part 48 indicates alteration to the determined tape speed after a backhitch is performed. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了防止在同步时的后跟，当交易大小大时，通过由缓冲器的空位产生的后退来降低性能。 解决方案：在磁带驱动器的控制器16中，当命令处理部分41接收同步命令并且缓冲器管理部分42将缓冲器中的数据传送到通道输入和输出部分43以完成对磁带的写入时， 从能够最终将数据的标称容量写入磁带的观点来看，后退判定部44确定是否执行后继交错写入。 当确定执行回跳写入时，速度确定部分45确定磁带速度，使得从缓冲器到磁带的数据写入时间长于从主机到缓冲器的数据传送时间; 并且操作信号输出部分48指示在执行后退之后对所确定的磁带速度的改变。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2007095231A

公开(公告)日：2007-04-12

申请号：JP2005286513

申请日：2005-09-30

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： WATANABE TERUE ,  ITAGAKI HIROSHI ,  NAKAYAMA KOICHI ,  NAGURA HIROHISA ,  KATAGIRI TAKASHI ,  OISHI YUTAKA ,  SHIRATORI TOSHIYUKI

IPC: G11B20/18 ,  G11B20/10

CPC classification number: G11B5/09 ,  G11B5/00821 ,  G11B20/10527 ,  G11B20/1201 ,  G11B2020/10666 ,  G11B2020/10759 ,  G11B2220/90

Abstract: PROBLEM TO BE SOLVED: To provide a write and read method for not performing a backhitch operation for avoiding the violation of a 4m rule while it is determined to write a sequential data set within 4m in a tape drive of LTO or the like. SOLUTION: The write and read control method for recording at least one data set in 4m in the length direction of a tape medium 550 comprises: a step of successively storing a plurality of blocks 510 of various sizes sent from a host in a buffer 500 divided by the segment 520 of a fixed size; a step of writing the contents of the segment to the tape medium as a data set when the segment 520 is prepared by at least one block 510 and writing a Null data set to the tape medium within 4m when the next segment 520 is not prepared while the tape medium moves for 4m; and a step of reading the data set to the segment of the buffer 500. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种写入和读取方法，用于在确定在4T的磁带驱动器内写入4m内的顺序数据集时，不执行用于避免4m规则的违反操作的后退操作 。 解决方案：用于在带介质550的长度方向上记录至少一个4m数据集的写入和读取控制方法包括：将主机发送的各种尺寸的多个块510连续存储在 缓冲器500除以固定尺寸的段520; 当片段520由至少一个块510准备并且当下一个段520未准备好时将空的数据集写入磁带介质4m内时，将段的内容写入磁带介质作为数据集的步骤， 磁带介质移动4m; 以及读取缓冲器500的段的数据集的步骤。（C）2007，JPO＆INPIT

公开(公告)号：JP2010055690A

公开(公告)日：2010-03-11

申请号：JP2008219803

申请日：2008-08-28

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： OISHI YUTAKA ,  KATAGIRI TAKASHI

IPC: G11B20/12 ,  G11B20/10

CPC classification number: G11B5/584 ,  G11B5/00834 ,  G11B5/4893 ,  G11B5/4969

Abstract: PROBLEM TO BE SOLVED: To read data without losing it even if an error occurs, when a format of data already recorded in a tape medium is changed.
SOLUTION: In a controller 16 of a tape drive, a buffer management section 42 reads a data set written in an old format only by the capacity of the buffer, and stores a read position when the buffer becomes full in a position storage section 44 as a next read start position. Then a DSIT generation section 45 generates a DSIT (Data Set Information Table) which includes the next read start position, and the buffer management section 42 adds the DSIT to the data set and writes it in a spare area. Then the DSIT generation section 45 generates the DSIT including the information which specifies a corresponding data set in the spare area and the next read start position, and the buffer management section 42 adds the DSIT to the data set and overwrites it using a new format.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：即使发生错误，即使在已经记录在磁带介质中的数据格式发生变化的情况下读取数据也不会丢失数据。 解决方案：在磁带驱动器的控制器16中，缓冲器管理部42仅通过缓冲器的容量读取以旧格式写入的数据集，并且当缓冲器满载时将读取位置存储在位置存储器 第44段作为下一个读取开始位置。 然后，DSIT生成部件45生成包括下一个读取开始位置的DSIT（数据集信息表），并且缓冲器管理部分42将DSIT添加到数据集中并将其写入备用区域。 然后，DSIT生成部45生成包括指定备用区域和下一个读取开始位置中的相应数据集的信息的DSIT，并且缓冲器管理部分42将DSIT添加到数据集并使用新格式覆盖它。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009169996A

公开(公告)日：2009-07-30

申请号：JP2008003741

申请日：2008-01-10

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： SHIRATORI TOSHIYUKI ,  KATAGIRI TAKASHI

IPC: G11B20/10

CPC classification number: G11B5/584 ,  G11B5/00817 ,  G11B20/00833 ,  G11B2020/1099 ,  G11B2220/90

Abstract: PROBLEM TO BE SOLVED: To improve possibility of identifying a recorded position of designated data even when a tape medium is run at high speed.
SOLUTION: In a controller 16 for a tape drive, a data set creating section 42 creates data set, a metadata creating section 43 creates metadata including the number of records contained in the data set, a writing section 41 writes the data set to the tape medium with high recording density while writing the metadata with low recording density, a movement control section 44 receives the record number of a designated record, a reading section 45 acquires the number of the records included in the metadata read by running the tape medium at high speed, and a comparison section 48 determines whether reading the data set or not by declining the speed of the tape medium to the R/W speed by comparing the record number received by the movement control section 44 with the number of the records acquired by the reading section 45.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：即使当磁带介质以高速运行时，也可以提高识别指定数据的记录位置的可能性。 解决方案：在用于磁带驱动器的控制器16中，数据集创建部分42创建数据集，元数据创建部分43创建包括数据集中包含的记录数的元数据，写入部分41写入数据集 移动控制部分44接收指定记录的记录号，读取部分45通过运行磁带获取包含在元数据中所读取的记录的数目，记录密度高的磁带介质， 并且比较部分48通过将移动控制部分44接收的记录号与记录数相比较来确定是否通过将磁带介质的速度降低到R / W速度来读取数据集 阅读第45节获得。

版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2006221695A

公开(公告)日：2006-08-24

申请号：JP2005032076

申请日：2005-02-08

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： ITAGAKI HIROSHI ,  NAKAYAMA KOICHI ,  KATAGIRI TAKASHI

IPC: G11B27/00 ,  G11B20/10

CPC classification number: G11B15/087

Abstract: PROBLEM TO BE SOLVED: To set an LEOT (Logical End of Tape) in an appropriate position on a tape.
SOLUTION: The apparatus includes a host I/F section 31 which receives the data set to be written into the tape, a data storage section 32 which stores the received data set in a buffer memory 33, a data transfer section 34 which fetches the data stored in the buffer memory 33 and transfers the same to a head, a buffer management section 35 which manages the number of the data sets stored in the buffer memory 33, a present position management section 36 which manages the information on the present write position on the tape, and an LEOT determination section 37 which decides whether the LEOT is to be notified to a host or not by collating the information managed by the buffer management section 35 and the information managed by the present position management section 36.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：将LEOT（逻辑磁带结束）设置在磁带上的适当位置。 解决方案：该装置包括接收要写入磁带的数据组的主机I / F部分31，将接收到的数据集存储在缓冲存储器33中的数据存储部分32，数据传送部分34 取出存储在缓冲存储器33中的数据并将其传送到头部，缓冲管理部分35，其管理存储在缓冲存储器33中的数据集的数量;当前位置管理部分36，管理当前的信息 在磁带上的写入位置以及LEOT确定部分37，其通过对由缓冲器管理部分35管理的信息和由当前位置管理部分36管理的信息进行整理来判定LEOT是否被通知给主机。 P>版权所有（C）2006，JPO＆NCIPI