Patent application number | Description | Published |
20090091853 | APPARATUS, SYSTEM, AND METHOD FOR INTERCHANGE TESTING - An apparatus, system, and method are disclosed for interchanging testing. A test module moves a first tape from a tape pool to a first reserved slot of plurality of reserved slots using an accessor. In an embodiment, there is one (1) reserved slot corresponding to each of a plurality of tape drives. Each reserved slot is configured to store one tape for the corresponding tape drive. No other tape drive accesses the stored tape from the reserved slot. Additionally, the test module loads the first tape to a first tape drive from the first reserved slot using the accessor, reads to end of at least two file marks on the first tape using the first tape drive, rewinds to a beginning of the first tape using the first tape drive, spaces forward on the first tape to a beginning of a second of the at least two file marks using the first tape drive, writes specified data to the first tape using the first tape drive, writes a new second file mark to the first tape using the first tape drive, and moves the first tape to the first reserved slot using the accessor. | 04-09-2009 |
20110051278 | DATA STORAGE DRIVE OVERWRITE PROTECTION OF NON-WORM CARTRIDGES - Protection against data overwrite of a rewritable non-WORM data storage cartridge is provided by a data storage drive operating cartridge data overwrite protection procedures independent of, or not withstanding, the absence of cartridge controls relating to data overwrite protection. Also for the non-WORM cartridge, the drive responds to an allow data overwrite command to allow an immediately subsequent write type command to write to the cartridge even if the write command overwrites existing data. The overwrite protection procedures and data overwrite procedures may be configured and enabled for the data storage drive. | 03-03-2011 |
20110055272 | EXTENDED DATA STORAGE SYSTEM - In one embodiment, an extended data storage system employs a first data storage and an extended data storage. A first level of metadata is established with respect to data from the using entity, the first level of metadata is provided in the first data storage. The data from the using entity is stored in the extended data storage. A second level of metadata at least describing the data as stored in the extended data storage is also established, wherein the second level of metadata associated with the first level of metadata for the stored data. The first level of metadata is made accessible to the using entity at the first data storage; and the second level of metadata is made unavailable to the using entity. Thus, the data is stored in the extended data storage and a small amount of metadata is stored in the first data storage. | 03-03-2011 |
20120233223 | EXTENDED DATA STORAGE SYSTEM - In one embodiment, an extended data storage system employs a first data storage and an extended data storage. A first level of metadata is established with respect to data from the using entity, the first level of metadata is provided in the first data storage. The data from the using entity is stored in the extended data storage. A second level of metadata at least describing the data as stored in the extended data storage is also established, wherein the second level of metadata associated with the first level of metadata for the stored data. The first level of metadata is made accessible to the using entity at the first data storage; and the second level of metadata is made unavailable to the using entity. Thus, the data is stored in the extended data storage and a small amount of metadata is stored in the first data storage. | 09-13-2012 |
20120233389 | MULTI-HOST CONCURRENT WRITING TO MAGNETIC TAPE - According to one embodiment, a method for storing data on a magnetic tape comprises receiving data from two different hosts and simultaneously writing the data from the hosts to the magnetic tape using multiple transducers. In another approach, a method for storing data on a magnetic tape comprises receiving requests to establish a concurrent reservation from multiple hosts and allocating a unique stripe in a wrap to each of the hosts that sent the requests, wherein the wrap is a collection of data tracks to be written simultaneously in one direction of tape movement by multiple transducers of a tape head, and the wrap is logically divided into the stripes. Also, the method includes receiving data from the hosts and simultaneously writing the data from the hosts to the magnetic tape using the multiple transducers. Other systems and methods concerning storing data on magnetic tapes are described as well. | 09-13-2012 |
20130179607 | ADJUSTABLE BUFFER SIZING FOR CONCURRENT WRITING TO TAPE - Data is buffered for concurrent writing to tape. For a magnetic tape drive having a magnetic head with multiple sets of transducers; a drive mechanism configured to pass a magnetic tape past the magnetic head; interfaces from two different hosts; and at least one buffer configured to buffer data; and a control; the buffering comprises receiving data from two different hosts at the interfaces; buffering the received data in separate buffer space of the buffer(s) associated with each host, and adjustably size the separate buffer space for each host in accordance with a data transfer rate of the host associated with the separate buffer space; and concurrently writing data from the separate buffer spaces with the magnetic head to separate partitions of the magnetic tape. | 07-11-2013 |