公开(公告)号：WO1995013607A1

公开(公告)日：1995-05-18

申请号：PCT/US1994012931

申请日：1994-11-10

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  MILES, Robert, J. ,  ZWEIGHAFT, James

IPC: G11B05/027

CPC classification number: G11B15/087 ,  G11B5/0086 ,  G11B15/32 ,  G11B15/43 ,  G11B15/50 ,  G11B15/52 ,  G11B15/6656

Abstract: A capstanless helical scan recording system includes a supply reel shaft (54); a take-up reel shaft (56); and a media transport path extending from a supply reel to a take-up reel. The take-up reel comprises a rotor assembly (60), a rotating hub assembly (70), and a gearing system. The rotor assembly includes a sun gear (80) which rotates at a first rotational speed. The rotating hub assembly carries three planetary gears (160) and imparts a velocity to media transported in the media transport path. The gearing system meshes with the rotor assembly and with the hub assembly for causing the hub assembly to have a greater rotational speed than the rotor assembly.

Abstract translation: 无绞盘螺旋扫描记录系统包括供带盘轴（54）; 收卷卷轴（56）; 以及从供应卷轴延伸到卷取卷轴的介质传送路径。 卷取卷轴包括转子组件（60），旋转轮毂组件（70）和传动系统。 转子组件包括以第一转速旋转的太阳齿轮（80）。 旋转轮毂组件承载三个行星齿轮（160）并且向媒体传送路径中传送的介质赋予速度。 齿轮系统与转子组件和轮毂组件啮合，以使轮毂组件具有比转子组件更大的旋转速度。

公开(公告)号：WO1991016704A1

公开(公告)日：1991-10-31

申请号：PCT/US1991002623

申请日：1991-04-19

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  PISCIOTTA, E., Christopher ,  GEORGIS, Steven, Philip

IPC: G11B05/588

CPC classification number: G11B15/4675 ,  G11B5/588 ,  G11B15/185

Abstract: A helical system (10) reads tracks (18) on a storage medium (12), including distorted tracks. Each track (18) comprises a plurality of blocks, with each block having unique block-identifying information. A servo system (84) causes a head (16C) to traverse predetermined original azimuthal paths (P0) across the medium (12) for reading the blocks recorded along each of the original path (P0). A controller (50) uses the block-identifying information to determine whether any blocks expected to be read during traversal of the original path (P0) were not read. If expected blocks were not read, the controller (50) repositions the medium (12) and directs that the medium (12) be re-read with the head (16C) offset until the expected blocks are actually read. During the re-read attempts, the read head (16C) is positionally offset to traverse modified azimuthal paths (P1, P2, P3, ... P10).

公开(公告)号：WO1991007124A1

公开(公告)日：1991-05-30

申请号：PCT/US1990006325

申请日：1990-11-06

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  MARLOWE, Christian, Paul

IPC: A47G19/08

CPC classification number: G11B23/0236

Abstract: A cartridge rack (70) includes ribs (816) for partitioning the rack into cells (826) for accommodating magnetic tape cartridges. A pair of resilient engagement fingers (832) is provided in each cell (826). Each engagement finger (826) has a chevron-shaped projection (840) to engage a light path window (862) provided on a lid of a standard 8 mm. magnetic tape cartridge. The ribs (816) also have a cartridge engagement ridge (860) thereon which engages a larger lid gap (863L) of a standard 8 mm. magnetic tape cartridge when the cartridge is inserted in a required orientation into a cell (826) of the rack (70). The rack (70) also has a bridging member (818) which is surmounted by an indicia (868) - bearing projection (866). The rack (70) further has resilient engagement tabs (870) for mounting the rack (70) on an extrusion mount (76). Orientation means (880) are provided on a bottom wall of the rack (70) to preclude the rack from being mounted on the extrusion mount in any but the required orientation.

公开(公告)号：WO1988009966A1

公开(公告)日：1988-12-15

申请号：PCT/US1988001698

申请日：1988-05-27

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  ZOOK, Christopher, P.

IPC: G06F11/10

CPC classification number: H03M13/159 ,  H03M13/1515 ,  H03M13/1525 ,  H03M13/1545 ,  H03M13/29 ,  H03M13/2903 ,  H03M13/2909 ,  H03M13/293 ,  H03M13/3738

Abstract: An error correction system (20) comprises a multi-pass controller (32) which operates through a controller/decoder interface (34) to supervise the execution of decoding passes by a decoder (30). The multi-pass controller (32) employs a correction procedure comprising a plurality of hierarchial strategies S(1), S(2),...S(N) for transitioning the procedure through a plurality of predetermined states. Upon completion of a decoding pass, a pass evaluator (70) evaluates the results of the decoding pass and uses the evaluation for establishing values for further operation. Further passes are executed in accordance with further states determined by the multi-pass controller (32), the further states having particular parameters associated therewith including a strategy selection.

公开(公告)号：WO1988009032A1

公开(公告)日：1988-11-17

申请号：PCT/US1988001439

申请日：1988-05-09

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  GEORGIS, Steven, P. ,  RODRIGUEZ, Juan, A. ,  PISCIOTTA, E., Christopher

IPC: G11B15/18

CPC classification number: G11B15/1875 ,  G11B15/4675 ,  G11B27/032 ,  G11B27/107 ,  G11B27/3018 ,  G11B27/3027 ,  G11B2220/90

Abstract: Apparatus and method are disclosed for enabling rapid search of magnetic tape (16) having information helically recorded thereon. A tape mark (ATM), consisting of an analog signal, is recorded on the magnetic tape (16) as a physical location reference in a manner such that the mark (ATM) can be detected at both normal playback speed and at faster search speeds. The recorded analog signal provides a highly reliable indication of record boundaries, including end of file, end of volume, end of directory, and the like.