-
公开(公告)号：US06958878B2
公开(公告)日：2005-10-25
申请号：US10694374
申请日：2003-10-27
IPC分类号： G11B15/46
CPC分类号： G11B15/46
摘要： In a magnetic tape drive having a plurality of stepped operational speeds, data storage logic estimates, from the effective data fill rate for a data buffer and the drive data write rate, the time cost to continue to operate the magnetic tape drive at the current stepped operational speed from a target to the next end of wrap; estimates, the time cost to force a backhitch of the magnetic tape data storage media and change the stepped operational speed to a higher stepped operational speed and operate the magnetic tape drive at the higher stepped operational speed to the next end of wrap; and determines the lesser time cost.
-
2.发明授权Calibrating optical disk lasers using a minimal amount of write-once data storage space 失效使用最少量的一次写入数据存储空间校准光盘激光器
公开(公告)号：US5790491A
公开(公告)日：1998-08-04
申请号：US590703
申请日：1996-04-08
IPC分类号： G11B7/0045 , G11B7/007 , G11B7/125 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/36 , G11B7/00
CPC分类号： G11B7/126 , G11B20/182 , G11B27/36 , G11B7/0045 , G11B7/00745 , G11B20/10009 , G11B20/1217 , G11B7/00451
摘要： A write-once read-many (WORM) optical disk recorder automatically calibrates its laser to emit a laser beam of a desired power level. While writing data to the WORM disk, a laser test signal is written to a laser checking area termed Automatic Laser Power Correction (ALPC) field. If the emitted laser test signal has a power level outside an acceptable power level window, then inappropriate laser power is indicated. Then, in an error recovery procedure (ERP) the laser power is calibrated in the data sector to be written to using short spaced-apart laser test signals. After successful calibration, data are written to the sector. The test signals appear as burst errors that can be corrected by a suitable error correction code. If such calibration is not successful then a write calibrate sector, WCS, is created and used for an extensive automatic calibration. In the WCS both laser power level is calibrated. The calibration result information is written to WCS for later use. A WCS may be created by command from a controller or attaching host for calibrating the laser and its control circuits in a WORM disk device. The WCS can also be written as a part of an ERP initiated by an unsuccessful write operation in one or more target sectors. Such initiation is based upon a determination that an inappropriate write power level may have been used in the attempted data writing.
摘要翻译： 一次写入许可（WORM）光盘记录器自动校准其激光以发射具有所需功率电平的激光束。 在将数据写入WORM磁盘时，将激光测试信号写入激光检查区域，称为自动激光功率校正（ALPC）字段。 如果发射的激光测试信号具有超出可接受功率电平窗口的功率电平，则指示不适当的激光功率。 然后，在错误恢复过程（ERP）中，激光功率在数据扇区中被校准，以被写入使用短间隔激光测试信号。 校准成功后，将数据写入扇区。 测试信号显示为可以通过合适的纠错码校正的突发错误。 如果这样的校准不成功，则写入校准扇区WCS被创建并用于广泛的自动校准。 在WCS中，激光功率电平被校准。 校准结果信息写入WCS供以后使用。 WCS可以通过来自控制器或附加主机的命令来创建，以在WORM磁盘设备中校准激光器及其控制电路。 WCS也可以作为由一个或多个目标扇区中不成功的写入操作启动的ERP的一部分。 这种启动是基于在尝试的数据写入中可能已经使用不适当的写入功率电平的确定。
-
3.发明授权公开(公告)号：US08375064B2
公开(公告)日：2013-02-12
申请号：US11381905
申请日：2006-05-05
IPC分类号： G06F17/30
CPC分类号： H03M13/096 , G06F11/1004
摘要： An apparatus, system, and method are disclosed for read back verification of stored data. A file CRC module calculates a first file CRC for a data file. A segmentation module segments the data file into a plurality of data blocks that comprise a copy of the data file. A block CRC module calculates a data block CRC for each data block. An aggregated CRC module calculates a second file CRC from the data block CRCs. In addition, the aggregated CRC module verifies copy of the data file if the second file CRC is substantially equivalent to the first file CRC.
摘要翻译： 公开了一种用于读回存储数据的验证的装置，系统和方法。 文件CRC模块计算数据文件的第一个文件CRC。 分割模块将数据文件分割成包括数据文件的副本的多个数据块。 块CRC模块计算每个数据块的数据块CRC。 聚合CRC模块从数据块CRC计算第二个文件CRC。 此外，如果第二文件CRC基本上等于第一文件CRC，则聚合CRC模块验证数据文件的副本。
-
公开(公告)号：US08300831B2
公开(公告)日：2012-10-30
申请号：US12767723
申请日：2010-04-26
申请人： David Ray Kahler , Anjul Mathur , Richard Anthony Ripberger , Jacob Lee Sheppard , Glen Alan Jaquette
发明人： David Ray Kahler , Anjul Mathur , Richard Anthony Ripberger , Jacob Lee Sheppard , Glen Alan Jaquette
IPC分类号： H04L9/00
CPC分类号： H04L9/083 , H04L9/0825
摘要： Provided are a computer program product, system and method for a redundant key server encryption environment. A key server transmits public keys associated with the key server and at least one device to at least one remote key server. The key server receives from the at least one remote key server public keys associated with the at least one remote key server. The key server receives a request for an encryption key from a requesting device comprising one of the at least one device and generates the encryption key for use by the requesting device to unlock a storage. The key server generates a first wrapped encryption key by encrypting the encryption key with a requesting device public key associated with the requesting device. The key server generates a second wrapped encryption key by encrypting the encryption key with a public key associated with the key server. At least one additional wrapped encryption key is generated for each of the at least one remote key server by encrypting the encryption key with the at least one public key provided by the at least one remote key server. The key server transmits the first, second and the at least one additional wrapped encryption key to the requesting device.
摘要翻译： 提供了一种用于冗余密钥服务器加密环境的计算机程序产品，系统和方法。 密钥服务器将与密钥服务器和至少一个设备相关联的公钥传送到至少一个远程密钥服务器。 密钥服务器从与至少一个远程密钥服务器相关联的至少一个远程密钥服务器公钥接收。 密钥服务器从包括至少一个设备之一的请求设备接收到对加密密钥的请求，并且生成加密密钥以供请求设备使用以解锁存储。 密钥服务器通过使用与请求设备相关联的请求设备公钥对加密密钥进行加密来生成第一封包加密密钥。 密钥服务器通过使用与密钥服务器相关联的公钥加密加密密钥来生成第二封包加密密钥。 通过利用由至少一个远程密钥服务器提供的至少一个公共密钥对加密密钥进行加密，为至少一个远程密钥服务器中的每一个生成至少一个附加的包装加密密钥。 密钥服务器将第一，第二和至少一个附加的包装加密密钥发送到请求设备。
-
5.发明授权公开(公告)号：US07965844B2
公开(公告)日：2011-06-21
申请号：US11688445
申请日：2007-03-20
CPC分类号： G11B20/00086
摘要： A method, system and program are disclosed for efficiently processing host data which comprises encrypted and non-encrypted data and is to be written to a storage medium. The encrypted data is written to the storage medium in encrypted form. The non-encrypted data is encrypted by a storage device using a well known encryption key and written to the storage medium. In this way, the data that is processed by the storage device to and from the storage medium can always be processed through a single encryption engine.
摘要翻译： 公开了一种方法，系统和程序，用于有效地处理包括加密和非加密数据的主机数据，并将其写入存储介质。 加密数据以加密形式写入存储介质。 未经加密的数据由存储装置使用公知的加密密钥进行加密并写入存储介质。 以这种方式，存储设备处理和从存储介质处理的数据可以总是通过单个加密引擎来处理。
-
公开(公告)号：US07953978B2
公开(公告)日：2011-05-31
申请号：US11530006
申请日：2006-09-07
CPC分类号： H04L9/083 , H04L63/062 , H04L2209/76
摘要： Provided are techniques for key generation and retrieval. Unique identifiers of two or more key servers are stored, wherein each key server is capable of generating keys for encryption of data and of returning keys for decryption of data. A key request is received. A technique for selecting one of the key servers to which the key request is to be forwarded is identified. One of the key servers is selected using the identified technique. The key request is sent to the identified key server.
摘要翻译： 提供了用于密钥生成和检索的技术。 存储两个或更多个密钥服务器的唯一标识符，其中每个密钥服务器能够生成用于加密数据的密钥和用于数据解密的返回密钥。 收到一个关键请求。 识别用于选择要转发密钥请求的密钥服务器之一的技术。 使用识别的技术选择其中一个关键服务器。 密钥请求被发送到识别的密钥服务器。
-
公开(公告)号：US07650461B2
公开(公告)日：2010-01-19
申请号：US12206089
申请日：2008-09-08
IPC分类号： G06F12/00
CPC分类号： G11B23/288 , G11B15/07 , G11B23/042 , G11B23/107
摘要： A magnetic tape cartridge, a recording system, and a magnetic tape drive are configured to, for example, guard against tampering with a write once overwrite protection pointer which allows a rewritable magnetic tape to be treated as write once. In one embodiment, the magnetic tape cartridge comprises a magnetic tape and a cartridge memory. The magnetic tape is configured to provide at least one overwrite protection pointer, the overwrite protection pointer identifying data to be protected from being overwritten; and the cartridge memory is configured to provide the at least one overwrite protection pointer, the overwrite protection pointer identifying magnetic tape data to be protected from being overwritten.
摘要翻译： 磁带盒，记录系统和磁带驱动器被配置为例如防止篡改写入一次重写保护指针，其允许可重写磁带被处理为一次写入。 在一个实施例中，磁带盒包括磁带和盒式存储器。 磁带被配置为提供至少一个覆盖保护指针，覆盖保护指针识别要被保护的数据不被覆盖; 并且盒存储器被配置为提供至少一个覆盖保护指针，所述覆盖保护指针标识要被保护的磁带数据不被重写。
-
公开(公告)号：US20090327625A1
公开(公告)日：2009-12-31
申请号：US12165540
申请日：2008-06-30
CPC分类号： G06F3/0641 , G06F3/0608 , G06F3/0689 , G06F12/0261 , G06F17/3015
摘要： Provided are a method, system, and article of manufacture for managing metadata for data blocks used in a deduplication system. File metadata is maintained for files having data blocks in a computer readable device. Data block metadata is maintained for each data block in the computer readable device. The data block metadata for one data block includes a data block reference and content identifier identifying content of the data block. The file metadata for each file includes the data block reference to each data block in the file. A determination is made of an unreferenced data block in the computer readable device that has become unreferenced. Indication is made that the data block metadata for the determined unreferenced data block as unreferenced metadata. The data block reference of the unreferenced metadata is maintained in the computer readable device in response to determining that a includes the data block indicated in the unreferenced metadata.
摘要翻译： 提供了一种用于管理在重复数据删除系统中使用的数据块的元数据的方法，系统和制品。 对于具有计算机可读设备中的数据块的文件，维护文件元数据。 为计算机可读设备中的每个数据块维护数据块元数据。 一个数据块的数据块元数据包括数据块参考和识别数据块内容的内容标识符。 每个文件的文件元数据包括对文件中每个数据块的数据块引用。 确定未被参考的计算机可读设备中的未引用的数据块。 指示将所确定的未引用的数据块的数据块元数据作为未引用的元数据。 响应于确定包括未引用的元数据中指示的数据块，将未引用的元数据的数据块引用保持在计算机可读设备中。
-
公开(公告)号：US20090177314A1
公开(公告)日：2009-07-09
申请号：US11971050
申请日：2008-01-08
IPC分类号： G06F7/00
CPC分类号： G11B20/16 , G11B5/00813 , G11B15/6835 , G11B15/6895
摘要： A system and computer program product are provided for utilizing target of opportunity to perform at least one special operation while a removable storage medium is mounted within a data storage drive for another purpose. The system comprises a tape library and a tape drive coupled to the tape library. The tape library receives a command to mount a tape cartridge in the tape drive. If it is determined by the tape library that at least one special operation may be performed, then tape library has recognized that a target of opportunity exists. In response to determining that at least one special operation may be performed, the tape library sends a first notification that the tape drive is to remain in a not ready state. The tape library mounts the tape cartridge in the tape drive after determining that at least one special operation may be performed. In response to the tape drive performing the at least one special operation, the tape library sends a second notification that the tape drive is in a ready state or an error state.
摘要翻译： 提供了一种系统和计算机程序产品，用于利用机会目标来执行至少一个特殊操作，同时可移动存储介质安装在数据存储驱动器内用于另一目的。 该系统包括磁带库和耦合到磁带库的磁带驱动器。 磁带库收到一个将磁带盒安装在磁带机中的命令。 如果由磁带库确定可以执行至少一个特殊操作，则磁带库已经认识到存在机会目标。 响应于确定可以执行至少一个特殊操作，磁带库发送磁带驱动器将保持未就绪状态的第一通知。 在确定至少可以执行一个特殊操作之后，磁带库将磁带盒安装在磁带驱动器中。 响应于磁带驱动器执行至少一个特殊操作，磁带库发送第二个通知，指示磁带驱动器处于就绪状态或错误状态。
-
公开(公告)号：US20090174961A1
公开(公告)日：2009-07-09
申请号：US11971087
申请日：2008-01-08
IPC分类号： G11B15/18
CPC分类号： G11B15/6835
摘要： A method is provided for utilizing target of opportunity to perform at least one special operation while a removable storage medium is mounted within a data storage drive for another purpose. A target of opportunity is recognized by determining if at least one special operation may be performed by the data storage drive. If it is determined that at least one special operation may be performed then a first notification that the data storage drive is to remain in a not ready state is sent in response. At least one special operation is performed, and in response to the at least one special operation being performed, a second notification is sent that the removable storage medium is in a ready state or an error state.
摘要翻译： 提供了一种用于利用机会目标执行至少一个特殊操作的方法，同时可移动存储介质安装在用于另一目的的数据存储驱动器内。 通过确定数据存储驱动器是否可以执行至少一个特殊操作来识别机会的目标。 如果确定可以执行至少一个特殊操作，则响应地发送数据存储驱动器将保持未就绪状态的第一通知。 执行至少一个特殊操作，并且响应于所执行的至少一个特殊操作，发送第二通知，使得可移动存储介质处于就绪状态或错误状态。
-
-
-
-
-
-
-
-
-
搜索结果
126 条记录 (耗时 0.027 秒)
