Delaying unload operation when rate of unloads exceeds a time varying unload limit
    1.
    发明授权
    Delaying unload operation when rate of unloads exceeds a time varying unload limit 有权
    卸载速度超过时间变化卸载限制时的延时卸载操作

    公开(公告)号:US09117481B1

    公开(公告)日:2015-08-25

    申请号:US12471265

    申请日:2009-05-22

    IPC分类号: G11B21/02

    CPC分类号: G11B21/02 G11B21/12

    摘要: A disk drive is disclosed comprising a disk, a head, and a ramp located near an outer periphery of the disk. The disk drive further comprises control circuitry operable to load the head off the ramp over the disk, receive an unload command to perform an unload operation, evaluate a number of unloads relative to an unload limit that varies over time, and when the number of unloads exceeds the unload limit, delay the unload operation.

    摘要翻译: 公开了一种磁盘驱动器,包括盘,磁头和位于磁盘外周附近的斜面。 磁盘驱动器还包括控制电路,其可操作以将磁头从磁盘上的斜坡加载到磁盘上,接收卸载命令以执行卸载操作,评估相对于随时间变化的卸载极限的卸载次数,以及当卸载次数 超过卸载限制,延迟卸载操作。

    Systems and methods for improving sequential data rate performance using sorted data zones
    3.
    发明授权
    Systems and methods for improving sequential data rate performance using sorted data zones 有权
    使用排序数据区域改进顺序数据速率性能的系统和方法

    公开(公告)号:US08687306B1

    公开(公告)日:2014-04-01

    申请号:US12729159

    申请日:2010-03-22

    IPC分类号: G11B5/596

    摘要: Systems and methods for writing a sequence of data to a disk drive using sorted data zones are provided. In one embodiment, a multi-head disk drive comprises a plurality of disk surfaces, wherein each disk surface comprises a plurality of data zones, each data zone having a data transfer rate different from the other zones of the respective disk surface. The multi-head disk drive also comprises a head assembly comprising a plurality of heads, wherein each head is configured to write data to a respective one of the disk surfaces, and a controller configured to operate the plurality of heads to sequentially write a sequence of data blocks to the plurality of disk surfaces in accordance with a list of head-zone combinations ordered from highest data rate to lowest data rate, each head-zone combination corresponding to one of the heads and a data zone of the respective disk surface.

    摘要翻译: 提供了使用排序数据区将数据序列写入磁盘驱动器的系统和方法。 在一个实施例中,多头盘驱动器包括多个盘表面,其中每个盘表面包括多个数据区,每个数据区具有不同于相应盘表面的其他区的数据传输速率。 多头磁盘驱动器还包括头组件,其包括多个磁头,其中每个磁头被配置为将数据写入到相应的一个盘表面,以及控制器,被配置为操作多个磁头以顺序地写入一系列 根据从最高数据速率到最低数据速率排序的头区组合的列表,将数据块传送到多个盘表面,每个头区组合对应于磁头之一和相应磁盘表面的数据区。

    PHYSICALLY MODIFYING A DATA STORAGE DEVICE TO DISABLE ACCESS TO SECURE DATA AND REPURPOSE THE DATA STORAGE DEVICE
    4.
    发明申请
    PHYSICALLY MODIFYING A DATA STORAGE DEVICE TO DISABLE ACCESS TO SECURE DATA AND REPURPOSE THE DATA STORAGE DEVICE 有权
    物理修改数据存储设备以禁止访问以保护数据并恢复数据存储设备

    公开(公告)号:US20100306551A1

    公开(公告)日:2010-12-02

    申请号:US12475340

    申请日:2009-05-29

    IPC分类号: G06F12/14

    CPC分类号: G06F21/80

    摘要: A data storage device is disclosed comprising a non-volatile memory and control circuitry operable to evaluate a physical feature of the data storage device, wherein the physical feature is physically alterable by a user. When the physical feature is in a first state, host access to first secure data stored in the non-volatile memory is enabled, and when the physical feature is in a second state, the host access to the first secure data is disabled and host access to second data stored in the non-volatile memory is enabled.

    摘要翻译: 公开了一种数据存储设备,其包括可操作以评估数据存储设备的物理特征的非易失性存储器和控制电路,其中物理特征可由用户物理地改变。 当物理特征处于第一状态时,对存储在非易失性存储器中的第一安全数据的主机访问被启用,并且当物理特征处于第二状态时,主机对第一安全数据的访问被禁用并且主机访问 到存储在非易失性存储器中的第二数据被使能。

    Disk drive estimating seek time according to a seek profile and a variance group
    5.
    发明授权
    Disk drive estimating seek time according to a seek profile and a variance group 有权
    磁盘驱动器根据查找配置文件和方差组估计查找时间

    公开(公告)号:US07471486B1

    公开(公告)日:2008-12-30

    申请号:US11961521

    申请日:2007-12-20

    IPC分类号: G11B5/596

    CPC分类号: G11B5/5547 G11B5/59655

    摘要: A disk drive is disclosed which receives a plurality of access commands from a host, where each access command identifies a target track. The access commands are stored in a command queue, and for each command in the command queue, a seek length is computed corresponding to a number of tracks between a current track the head is over and the target track of the access command. A seek time is computed in response to the seek length using a seek profile comprising a first plurality of seek length segments and a variance group comprising a second plurality of seek length segments. Each seek length segment corresponds to a range of seek lengths, and the first plurality of seek length segments is different than the second plurality of seek length segments.

    摘要翻译: 公开了一种磁盘驱动器,其从主机接收多个访问命令,其中每个访问命令标识目标轨道。 访问命令被存储在命令队列中,并且对于命令队列中的每个命令,对应于头部的当前轨道和访问命令的目标轨道之间的轨道数量来计算搜索长度。 使用包括第一多个寻道长度段的搜索简档和包括第二多个寻找长度段的方差组来响应于寻道长度来计算寻道时间。 每个搜索长度段对应于搜索长度的范围,并且第一多个寻道长度段不同于第二多个寻道长度段。

    Physically modifying a data storage device to disable access to secure data and repurpose the data storage device
    7.
    发明授权
    Physically modifying a data storage device to disable access to secure data and repurpose the data storage device 有权
    物理修改数据存储设备以禁用对安全数据的访问并重新使用数据存储设备

    公开(公告)号:US08838995B2

    公开(公告)日:2014-09-16

    申请号:US12475340

    申请日:2009-05-29

    IPC分类号: G06F21/00 G06F21/80

    CPC分类号: G06F21/80

    摘要: A data storage device is disclosed comprising a non-volatile memory and control circuitry operable to evaluate a physical feature of the data storage device, wherein the physical feature is physically alterable by a user. When the physical feature is in a first state, host access to first secure data stored in the non-volatile memory is enabled, and when the physical feature is in a second state, the host access to the first secure data is disabled and host access to second data stored in the non-volatile memory is enabled.

    摘要翻译: 公开了一种数据存储设备,其包括可操作以评估数据存储设备的物理特征的非易失性存储器和控制电路,其中物理特征可由用户物理地改变。 当物理特征处于第一状态时,对存储在非易失性存储器中的第一安全数据的主机访问被启用,并且当物理特征处于第二状态时,主机对第一安全数据的访问被禁用并且主机访问 到存储在非易失性存储器中的第二数据被使能。

    Method for increasing a processor operating frequency when other subsystem demands are low
    8.
    发明授权
    Method for increasing a processor operating frequency when other subsystem demands are low 有权
    当其他子系统需求较低时增加处理器工作频率的方法

    公开(公告)号:US08078901B1

    公开(公告)日:2011-12-13

    申请号:US12140238

    申请日:2008-06-16

    IPC分类号: G06F1/00

    摘要: A host activity measure indicative of a frequency of disk access commands received by a disk drive is determined, and then compared against a host activity threshold. A subsystem activity measure indicative of an activity level of a disk drive subsystem is also determined, and then compared against a subsystem activity threshold. Based at least in part on a determination that 1) the host activity measure is indicative of a greater frequency of disk access commands than the host activity threshold, and 2) the subsystem activity measure is indicative of less activity than the subsystem activity threshold, an operating frequency of a disk drive processor is increased.

    摘要翻译: 确定指示由磁盘驱动器接收的磁盘访问命令的频率的主机活动度量,然后与主机活动阈值进行比较。 还确定了指示磁盘驱动器子系统的活动级别的子系统活动度量,然后与子系统活动阈值进行比较。 至少部分地基于以下确定:1)主机活动度量指示比主机活动阈值更大的磁盘访问命令的频率,以及2)子系统活动度量表示比子系统活动阈值更少的活动, 磁盘驱动器处理器的工作频率增加。

    Disk drive steering write data to write cache based on workload
    9.
    发明授权
    Disk drive steering write data to write cache based on workload 有权
    磁盘驱动器转向将数据写入基于工作负载的缓存

    公开(公告)号:US08959284B1

    公开(公告)日:2015-02-17

    申请号:US12824959

    申请日:2010-06-28

    IPC分类号: G06F3/06 G06F12/00 G06F13/00

    摘要: A disk drive is disclosed comprising a non-volatile write cache and a head actuated over a disk. A plurality of write commands are received from a host, wherein each write command comprises write data. A workload for a non-cache area of the disk is determined, and when the workload for the non-cache area of the disk is less than a threshold independent of a workload for the write cache, substantially all of the write data is stored in the non-cache area of the disk. When the workload for the non-cache area of the disk is greater than the threshold independent of the workload for the write cache, a first percentage of the write data is stored in the non-volatile write cache and a second percentage of the write data is stored in the non-cache area of the disk, wherein the first percentage is proportional to the workload for the non-cache area of the disk.

    摘要翻译: 公开了一种磁盘驱动器,其包括非易失性写入高速缓存和在盘上致动的磁头。 从主机接收多个写入命令,其中每个写入命令包括写入数据。 确定磁盘的非高速缓存区域的工作负载,并且当磁盘的非高速缓存区域的工作负载小于独立于写入高速缓存的工作负载的阈值时,基本上所有的写入数据都被存储在 磁盘的非高速缓存区域。 当磁盘的非高速缓存区域的工作负载大于独立于写入高速缓存的工作负载的阈值时,写入数据的第一百分比被存储在非易失性写入高速缓存中,并且写入数据的第二百分比 存储在磁盘的非高速缓存区域中,其中第一百分比与磁盘的非高速缓存区域的工作负载成比例。

    Hybrid drive balancing execution times for non-volatile semiconductor memory and disk
    10.
    发明授权
    Hybrid drive balancing execution times for non-volatile semiconductor memory and disk 有权
    非易失性半导体存储器和磁盘的混合驱动平衡执行时间

    公开(公告)号:US08775720B1

    公开(公告)日:2014-07-08

    申请号:US13156813

    申请日:2011-06-09

    IPC分类号: G06F12/02

    摘要: A hybrid drive is disclosed comprising a head actuated over a disk, and a non-volatile semiconductor memory (NVSM). A first execution time needed to execute commands in a NVSM command queue is estimated, and a second execution time needed to execute commands in a disk command queue is estimated. An access command is inserted into a selected one of the NVSM command queue and the disk command queue in response to the first and second execution times, and one of the first and second execution times is updated in response to an estimated execution time of the access command.

    摘要翻译: 公开了一种混合驱动器,其包括在盘上致动的磁头和非易失性半导体存储器(NVSM)。 估计在NVSM命令队列中执行命令所需的第一执行时间,并且估计在盘命令队列中执行命令所需的第二执行时间。 响应于第一和第二执行时间,将访问命令插入到NVSM命令队列和磁盘命令队列中的所选择的一个中,并且响应于所访问的估计执行时间来更新第一和第二执行时间中的一个 命令。