摘要:
Provided are a method, system, and article of manufacture for writing data in a tape medium having wraps. A layout of the tape is provided including at least one segment within a full length of first set of wraps for writing user data and at least one segment within a full length of a second set of wraps for writing a work copy of the user data. User data is received to write to the tape medium. Detection is made of whether data writing is occurring in a specified write mode. A work copy is written to available segments in the second set of wraps not having user data in response to the data writing occurring in the specified write mode.
摘要:
Provided are a method, system, and program for writing data in a tape medium having wraps. A layout of the tape is provided including at least one segment within a full available length of a first set of wraps for writing user data and at least one segment within a full length of a second set of wraps for writing a work copy of the user data. User data is received to write to the tape medium and detecting is performed as to whether the data being written is occurring in a specified write mode. If the data writing is not occurring in the specified write mode, then writing the received user data to one segment in the first set of wraps. If the data writing is occurring in the specified write mode, then writing a work copy to available full length wraps not having user data.
摘要:
A method, system, and a device have a data storage drive for an automated data storage library in which a data storage drive may have in one embodiment, both a host-drive interface port and a host-library interface port. In one aspect, drive commands from a host system are conducted primarily through the host-drive interface port and a host-drive interface path to a drive controller of the data storage drive. In addition, library commands from the host system to a library controller may be conducted primarily through the host-library interface port and a host-library interface path to a library communication port of the data storage drive. In one embodiment, the drive commands from a host system are conducted primarily through the host-drive interface port and the host-drive interface path to a drive controller of the data storage drive. In addition, the library commands from a host system are conducted primarily through the host-library interface port and the host-library interface path to the library communication port of the data storage drive. Other embodiments are described and claimed.
摘要:
Synchronized data is written to magnetic tape while reducing the number of backhitches. A controller detects a pattern of synchronizing events for received data records to be written to tape; writes each transaction of data records to the magnetic; tape; accumulates the synchronized transactions in a buffer; and subsequently recursively writes the accumulated transactions of data records from the buffer to the magnetic tape in a sequence. A single backhitch may be employed to place the recursively written accumulated data records following the preceding data, maximizing performance and capacity.
摘要:
A method, system, and apparatus for re-conveying input/output (I/O) operations utilizing a sequential-access data storage device secondary communication port are disclosed. In accordance with one embodiment, a method is provided which comprises receiving an input/output (I/O) operation request via a first communication port of a primary data storage device, processing the I/O operation request utilizing the primary data storage device, and re-conveying the I/O operation request to a secondary data storage device substantially simultaneously with the processing via a second communication port of the primary data storage device. In the described embodiment, the primary data storage device comprises a sequential-access data storage device.
摘要:
A cartridge handling system and method are provided to initialize a data storage cartridge having rewritable media and a cartridge memory for tamper resistant write once recording. During initialization of the cartridge for write once recording, selected data set information table fields of each data set are scrambled. The scrambling algorithm may employ a random number generator seeded with a unique cartridge identifier. The fields thus becomes unreadable if the unique identifier is changed, such as if the cartridge memory of the cartridge has been altered or replaced.
摘要:
Methods, apparatus and computer program products are provided to monitor and report performance data of a device such as a data storage drive. A plurality of quantitative values are obtained from feedback and measurement mechanisms in a data storage device of a first model during operation of the storage device. The plurality of quantitative values are normalized. Then, one or more qualitative values are generated from one or more normalized quantitative values and evaluated against corresponding baseline performance values established for the first model.
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:
A method is disclosed to transfer information between data storage devices. The method provides an information storage assembly comprising a frame, a memory device disposed on that frame, information written to that memory device, a power supply removeably attached to the frame, and a first data storage device comprising a first identity removeably attached the frame. If the method detects an error in the first data storage device, then the method removes the first data storage device from the frame. The method further provides a replacement data storage device, removeably attaches that replacement data storage device to the frame, and determines if the replacement device uses the first configuration information. If the replacement device uses the first configuration information, then the method provides the first configuration information to the replacement data storage device from the memory device.
摘要:
A method to transfer information between data storage devices. The method provides an information storage assembly comprising a frame, a memory device disposed on that frame, information written to that memory device, a power supply removeably attached to the frame, and a first data storage device comprising a first identity removeably attached the frame. The method writes first configuration information to the memory device. If the method detects an error in the first data storage device, then the method removes the first data storage device from the frame. The method further provides a replacement data storage device, removeably attaches that replacement data storage device to the frame, and determines if the replacement device uses the first configuration information. If the replacement device uses the first configuration information, then the method provides the first configuration information to the replacement data storage device from the memory device.