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公开(公告)号:WO1997027545A1
公开(公告)日:1997-07-31
申请号:PCT/US1997001102
申请日:1997-01-24
Applicant: EXABYTE CORPORATION
Inventor: EXABYTE CORPORATION , AYERS, Mark, R. , STEWART, Alexander , HARTUNG, Steven, F.
IPC: G06F13/00
CPC classification number: G06F3/0601 , G06F3/0607 , G06F3/0613 , G06F3/0614 , G06F3/0619 , G06F3/0644 , G06F3/0655 , G06F3/0656 , G06F3/0682 , G11B5/00813 , G11B5/00817 , G11B5/0083 , G11B5/00878 , G11B5/00891 , G11B5/012 , G11B5/54 , G11B5/5508 , G11B5/584 , G11B5/5965 , G11B5/59688 , G11B5/78 , G11B5/86 , G11B15/026 , G11B15/04 , G11B15/05 , G11B15/06 , G11B15/087 , G11B15/1808 , G11B15/1875 , G11B15/52 , G11B20/00086 , G11B20/10 , G11B20/10527 , G11B20/1202 , G11B20/1204 , G11B20/1205 , G11B20/16 , G11B20/18 , G11B20/1879 , G11B20/1883 , G11B27/032 , G11B27/036 , G11B27/107 , G11B27/30 , G11B27/3018 , G11B27/3027 , G11B27/32 , G11B27/328 , G11B27/36 , G11B2020/1062 , G11B2020/10814 , G11B2020/1282 , G11B2220/216 , G11B2220/90 , G11B2220/916 , G11B2220/95 , H04N5/765 , H04N5/775 , H04N5/782 , H04N5/9261
Abstract: A magnetic tape drive dynamically adjusts a transport rate of tape (32) in accordance with a host data rate. The host data rate is assessed in relation to a data fill level of a buffer (116). A controller (130) of the drive compares the data fill level of the buffer with a buffer normalization value and generates an adjustment value for adjusting a signal indicative of the desired linear velocity of the tape. In one embodiment, the controller also dynamically changes the buffer normalization value to reflect e.g., historical performance of the host. In another embodiment the controller adjusts the transport rate when a head (100) is within a predetermined distance of a boundary point whereat the head must change tracks.
Abstract translation: 磁带驱动器根据主机数据速率动态调整磁带(32)的传输速率。 相对于缓冲器的数据填充级别来评估主机数据速率(116)。 驱动器的控制器(130)将缓冲器的数据填充水平与缓冲器归一化值进行比较,并且生成用于调整指示磁带的期望线速度的信号的调整值。 在一个实施例中,控制器还动态地改变缓冲器归一化值以反映例如主机的历史性能。 在另一个实施例中,当头部(100)在头部必须改变轨迹的边界点的预定距离内时,控制器调节传送速率。