摘要:
A winding-up method for winding up a magnetic tape, includes: winding up the magnetic tape around a takeup reel by laying turns one on top of another while causing the magnetic tape to run; and performing a tension control of maintaining tension exerted on a wound-up magnetic tape for a predetermined time.
摘要:
Embodiments of systems and methods for archive verification are disclosed. More specifically, embodiments of this archive verification can comprise loading media into a drive and reading data from the media to verify that the media and data on the media can be read. In one embodiment, media can be loaded into a drive and read according to a verification policy. As part of verifying that media and data on media can be read, read errors or other verification data associated with media can be obtained. Using this verification data a result for the media may be determined.
摘要:
Embodiments of the invention relate to tape drive systems having overlapped operations. In one aspect, a system includes a head for performing read and/or write operations, a first set of motors for performing positioning operations on a first tape, a second set of motors for performing positioning operations on a second tape, and a processor and logic integrated with and/or executable by the processor. The logic is configured to cause the first set of motors to pass the first tape over the head while causing the second set of motors to perform at least one of a coarse locate and a rewind operation on the second tape. Additional systems and methods are also disclosed.
摘要:
Embodiments of systems and methods for archive verification are disclosed. More specifically, embodiments of this archive verification can comprise loading media into a drive and reading data from the media to verify that the media and data on the media can be read. In one embodiment, media can be loaded into a drive and read according to a verification policy. As part of verifying that media and data on media can be read, read errors or other verification data associated with media can be obtained. Using this verification data a result for the media may be determined.
摘要:
Embodiments of systems and methods for archive verification are disclosed. More specifically, embodiments of this archive verification can comprise loading media into a drive and reading data from the media to verify that the media and data on the media can be read. In one embodiment, media can be loaded into a drive and read according to a verification policy. As part of verifying that media and data on media can be read, read errors or other verification data associated with media can be obtained. Using this verification data a result for the media may be determined.
摘要:
Systems, methods and apparatus for archive verification including the verification of media in a library, are disclosed. More specifically, a method of archive verification may include performing an initial verification on a set of media to obtain an initial result for each of the media. Based on the results of the initial verification a subsequent set of media may be selected for subsequent verification utilizing a set of rules. A subsequent verification may then be performed on each of the subsequent set of media. Based on the results of the subsequent verification it can then be attempted to determine if any of the media require still require subsequent verification using the set of rules. This iterative process may continue until no media need any subsequent verification.
摘要:
In some embodiments, a system includes a plurality of tape reels positioned on a lower surface, a tape drive for reading data from a tape on one of the plurality of tape reels, and at least one mobile robot configured for selectively retrieving at least one of the plurality of tape reels and transporting the at least one retrieved tape reel to the tape drive.
摘要:
A tape drive comprising a head configured to read data from a tape and to write data to the tape, a pair of flanged guide rollers arranged one on either side of the head to guide the tape longitudinally over the head, and a flangeless inertial roller arranged between a flanged guide roller and the head to add inertia to the tape so as to limit speed and movement of the tape as it passes over the head.
摘要:
A winding-up method for winding up a magnetic tape, includes: winding up the magnetic tape around a takeup reel by laying turns one on top of another while causing the magnetic tape to run; and performing a tension control of maintaining tension exerted on a wound-up magnetic tape for a predetermined time.
摘要:
A magnetic recording disk drive uses a disk having pre-patterned servo sectors extending generally radially across the data tracks. The servo sectors include at least two position error signal (PES) bursts or fields. The phases of the PES fields in the servo readback signal are demodulated to generate a PES to control the disk drive actuator for positioning the read/write heads. Each field contains generally radially directed magnetized stripes, with each stripe comprising a plurality of islands forming a zigzag pattern. The stripes have alternating polarity of magnetizations in the along-the-track direction. In one implementation there are four fields: a first pair of fields A and B wherein the zigzag pattern of the radial stripes in field A is the mirror image about a radial line of the zigzag pattern of the radial stripes in field B, and a second like pair of fields C and D, but wherein the radial stripes in fields C and D are shifted radially by one-half the island radial height from the radial stripes in fields A and B.