Shingled magnetic recording disk drive with minimization of the effect of far track erasure on adjacent data bands
    7.
    发明授权
    Shingled magnetic recording disk drive with minimization of the effect of far track erasure on adjacent data bands 有权
    具有最小化远距离擦除对相邻数据带的影响的嵌入式磁记录磁盘驱动器

    公开(公告)号:US08537481B1

    公开(公告)日:2013-09-17

    申请号:US13423177

    申请日:2012-03-17

    IPC分类号: G11B27/36

    摘要: A shingled magnetic recording (SMR) hard disk drive (HDD) essentially eliminates the effect of far track erasure (FTE) in the boundary regions of annular data bands caused by writing in the boundary regions of adjacent annular data bands. The extent of the FTE effect is determined for each track within a range of tracks of the track being written. Based on the relative FTE effect for all the tracks in the range, a count increment (CI) table or a cumulative count increment (CCI) table is maintained for all the tracks in the range. For every writing to a track in a boundary region, a count for each track in an adjacent boundary region, or a cumulative count for the adjacent boundary region, is increased. When the count reaches a predetermined threshold the data is read from that band and rewritten to the same band.

    摘要翻译: 磁带录音(SMR)硬盘驱动器(HDD)基本上消除了在相邻环形数据频带的边界区域中写入引起的环形数据频带的边界区域中的远跟踪擦除(FTE)的影响。 对正在写入的轨道的轨道范围内的每个轨道确定FTE效果的程度。 基于该范围内所有轨道的相对FTE效应,对该范围内的所有轨道维持计数增量(CI)表或累积计数增量(CCI)表。 对于对边界区域中的轨迹的每次写入,相邻边界区域中的每个轨道的计数或相邻边界区域的累积计数增加。 当计数达到预定阈值时,从该频带读取数据并重写到相同的频带。

    SHINGLED MAGNETIC RECORDING DISK DRIVE WITH MINIMIZATION OF THE EFFECT OF FAR TRACK ERASURE ON ADJACENT DATA BANDS
    9.
    发明申请
    SHINGLED MAGNETIC RECORDING DISK DRIVE WITH MINIMIZATION OF THE EFFECT OF FAR TRACK ERASURE ON ADJACENT DATA BANDS 有权
    最小化跟踪擦除对相邻数据库的影响的摇摆磁记录盘驱动器

    公开(公告)号:US20130242426A1

    公开(公告)日:2013-09-19

    申请号:US13423177

    申请日:2012-03-17

    IPC分类号: G11B27/36

    摘要: A shingled magnetic recording (SMR) hard disk drive (HDD) essentially eliminates the effect of far track erasure (FTE) in the boundary regions of annular data bands caused by writing in the boundary regions of adjacent annular data bands. The extent of the FTE effect is determined for each track within a range of tracks of the track being written. Based on the relative FTE effect for all the tracks in the range, a count increment (CI) table or a cumulative count increment (CCI) table is maintained for all the tracks in the range. For every writing to a track in a boundary region, a count for each track in an adjacent boundary region, or a cumulative count for the adjacent boundary region, is increased. When the count reaches a predetermined threshold the data is read from that band and rewritten to the same band.

    摘要翻译: 磁带录音(SMR)硬盘驱动器(HDD)基本上消除了在相邻环形数据频带的边界区域中写入引起的环形数据频带的边界区域中的远跟踪擦除(FTE)的影响。 对正在写入的轨道的轨道范围内的每个轨道确定FTE效果的程度。 基于该范围内所有轨道的相对FTE效应,对该范围内的所有轨道维持计数增量(CI)表或累积计数增量(CCI)表。 对于对边界区域中的轨迹的每次写入,相邻边界区域中的每个轨道的计数或相邻边界区域的累积计数增加。 当计数达到预定阈值时,从该频带读取数据并重写到相同的频带。

    ICC-NCQ command scheduling for shingle-written magnetic recording (SMR) Drives
    10.
    发明授权
    ICC-NCQ command scheduling for shingle-written magnetic recording (SMR) Drives 有权
    用于瓦楞纸磁记录(SMR)驱动器的ICC-NCQ命令调度

    公开(公告)号:US08874875B2

    公开(公告)日:2014-10-28

    申请号:US13537293

    申请日:2012-06-29

    IPC分类号: G06F12/10 G06F12/02

    摘要: ICC-NCQ priority and deadline information in conjunction with an estimation of command access time that is specific to SMR drives are used improve command queue optimization. Estimated completion times are determined based on the internal subcommands that the drive has to execute to complete the host read or write command taking into account whether all or part of the data will be or already is stored in write-twice cache, E-region and/or I-region. The command processor selects the next command for execution based on calculated access times with adjusted priority based on the specified deadline for the command. As the deadline approaches, the priority of the command increases. For high priority data writes as specified by a host, an optimized storage plan is selected as appropriate using the “write-twice cache” (WTC) region, E-region or I-region.

    摘要翻译: 使用ICC-NCQ优先级和截止日期信息以及特定于SMR驱动器的命令访问时间的估计来改进命令队列优化。 估计的完成时间是基于驱动器执行的内部子命令来确定的,以完成主机读或写命令,考虑到全部或部分数据是否已经存储在二次写入高速缓存,E区和 /或I区域。 命令处理器根据计划的访问次数,根据指定的最终期限,选择下一个执行命令,并以调整的优先级。 随着截止日期的到来,命令的优先级增加。 对于由主机指定的高优先级数据写入,使用“两倍写入高速缓存”(WTC)区域,E区域或I区域,适当地选择优化的存储方案。