CN101826360A - 数据存储介质中改进的伺服设计 - Google Patents
数据存储介质中改进的伺服设计 Download PDFInfo
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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Abstract
一种数据存储介质包括多个数据区和多个被配置为向读装置提供定位信息的伺服区。多个数据区中的每一个数据区都对应于多个伺服区中的多于一个伺服区。该多个伺服区中的多于一个伺服区被配置为在对应于相应数据区的数据操作的离散时间向读装置提供定位信息。
Description
技术领域
本发明一般涉及一种数据存储介质并且尤其涉及数据存储介质中改进的伺服设计。
背景技术
图1图示说明了传统的数据存储系统,该系统包括硬盘盘片101,在该盘片中圆周磁道包括多个数据区,例如数据区102a-102c、103a-103c和104a-104c,这些数据区由楔形伺服带分开,例如伺服带105、106和107。在盘片101旋转(在方向110上)时,读装置(诸如磁传感器108)可以在摆动臂109上悬浮在盘片101上方,以此使得传感器在经过数据区(例如数据区103a)之前经过伺服带(诸如伺服带105)。在经过伺服地带105时,传感器108探测在其上编码的定位信息,并且因此能够精确地确定其相对于数据区103a的位置。
当磁畴(或其他表示数据位的结构)的尺寸减小时,为了提供增加的数据容量,精确的定位信息变得越来越重要。例如,在具有非常高的区域密度的数据存储介质中,定时抖动源给出了对于写磁头和特定磁畴的物理位置之间同步的一个严重障碍。在这方面,在传感器已经经过了沿着数据区的磁道长度的部分路途时,可能会失去同步。这可以通过减少数据区的磁道长度并且增加伺服区的数量来补偿,但是这样的方式会减少能够存储到介质上的数据量。
发明内容
本发明的不同实施例通过提供伺服设计解决了上述问题,该伺服设计允许改进在数据存储介质中的同步而很少增加或不增加作为伺服区的介质区域。在对给定的数据区进行数据操作期间(和/或之前),读装置与多个沿着数据区长度隔开的伺服区进行多次时间同步。
根据主题公开的一个方面,数据存储介质包括多个数据区和多个被配置为向读装置提供定位信息的伺服区。多个数据区中的每一个都对应于多个伺服区中的多于一个伺服区。该多个伺服区中的多于一个伺服区被配置为在对应于相应数据区的数据操作的离散时间向读装置提供定位信息。
根据主题公开的另一方面,数据存储系统包括具有多个数据区和多个伺服区的数据存储介质。该数据存储系统进一步包括读装置,该读装置被配置为在多个数据区之一的数据操作之前从多个伺服区之一接收第一定位信息并且在多个数据区之一的数据操作期间从多个伺服区中的另一个接收第二定位信息。
根据主题公开的另一个方面,数据存储系统包括读装置和数据存储介质。该数据存储介质包括多个数据区和多个被配置为向读装置提供定位信息的伺服区。多个数据区中的每一个数据区都对应于多个伺服区中的多于一个伺服区。该多个伺服区中的多于一个伺服区被配置为在对应于在相应数据区的数据操作的离散时间向读装置提供定位信息。
应当理解的是,本发明的上述概述和下列详细描述都是示例性和说明性的并且其目的是提供所要求保护的发明的进一步说明。
附图说明
所包括的附图是为了提供对本发明的进一步理解,其合并于说明书中并且作为说明书的组成部分,图解说明了本发明的实施例,并且与描述一起用于解释本发明的原理。附图中:
图1是图解说明现有技术的数据存储系统的简略图;
图2是图解说明根据主题公开的一个方面的数据存储系统的简略图;
图3是根据主题公开的一个方面的数据存储系统的局部视图;
图4是根据主题公开的一个方面的数据存储系统的局部视图;
图5是根据主题公开的一个方面的数据存储系统的局部视图;以及
图6是根据主题公开的一个方面的数据存储系统的局部视图。
具体实施方式
在下列的详细描述中,阐述众多特定的细节以提供对本发明的充分理解。然而,对于本领域普通技术人员来说显而易见的是,在缺少某些这些特定细节的情况下也可以实施本发明。在另一些情况下,没有详细地显示公知的结构和技术,以避免不必要地模糊本发明。
图2是图解说明根据主题公开的一个方面的数据存储系统的简化的、不按比例的图。数据存储系统200包括数据存储介质201,例如硬盘驱动盘片,该数据存储介质包括多个数据区(202a,202b,203a,203b,204a和204b)和多个伺服区(212a,212b,213a,213b,214a和214b)。根据主题公开的各个方面,硬盘驱动盘片可以被配置为连续的媒体、离散的磁道媒体或位模式媒体。数据存储系统200进一步包括借助摆动臂209悬浮在数据存储介质201上方的读装置208。
在示例性数据存储介质201中,每个数据区对应于多于一个伺服区,并且每个伺服区对应于多于一个数据区。特别是,每个数据区与多于一个伺服区相关联,在该数据区的数据操作期间(和/或之前)所述伺服区向读装置208提供定位信息。另外,每个伺服区被配置成在多个邻近数据区中的多次数据操作期间(和/或之前),向读装置208提供定位信息。例如,数据存储区203a对应于伺服区213a(在数据区203a上的数据操作开始之前该伺服区向读装置208提供定位信息)、伺服区214a(在数据区203a上的数据操作进行到约1/3时,该伺服区向读装置208提供定位信息)和伺服区212a(在数据区203a上的数据操作进行到约2/3时,该伺服区向读装置提供定位信息)。
参考图2可以看出,该配置是通过将伺服区一个隔一个沿圆周隔开实现的,使得在对数据区的读或写期间,多个伺服区能够向读装置208提供定位信息,由此也可以维持读装置208与数据区的同步。
参考图3就可以更容易地理解这点,该图图解说明根据主题公开的一个方面的数据存储系统的局部视图。数据存储系统300包括数据存储介质,该介质包括多个数据存储区,例如那些布置在圆周磁道301、302和303中的数据存储区。该数据存储介质进一步包括多个被配置为向读装置350提供定位信息的伺服区。读装置350包括多个圆周地隔开的磁阻传感器351、352和353。每个数据区对应于多于一个伺服区,由此使得在数据区之一的数据操作(例如读或写)中,多于一个对应的伺服区在对应于该数据操作的离散时间(例如之前或期间)向读装置350的传感器351、352和353提供定位信息。
例如,在数据区323(在该处数据存储介质在读装置350的下方在方向360旋转)的读操作中,读装置350在对应于读操作的多个离散时间获取定位信息。当伺服区322经过读装置350的传感器352的下方时,传感器352获取在读操作开始时的定位信息。当伺服区333经过读装置350的传感器353的下方时,传感器353获取关于读操作进行到大约1/3的定位信息。当伺服区314经过读装置350的传感器351的下方时,传感器351获取关于读操作进行到约2/3的定位信息。在这方式下,读装置350与数据区323的同步可以在整个读操作中始终得以维持。
在上述示例性实施例中,已经参考具有沿圆周隔开的数据区和伺服区的旋转盘(例如磁盘和光盘)描述了本发明,本发明的范围并不限于这样的布置。而对于本领域技术人员里说显然的是,本发明能够应用到任何数据存储介质,在该介质中布置有平行的或相邻的数据区,例如磁带媒体等等。
例如,转向图4,根据主题公开的一个示例性方面的数据存储系统被部分地说明。图4的数据存储系统包括数据存储介质(这里用三个平行的数据磁道401、402和403表示),该数据存储介质包括多个数据区(412、414、421、423、432和434)和多个伺服区(411、413、422、431和433)。该数据存储系统进一步包括读装置450,其包括多个读取器(451、452和453)。根据主题公开的不同实施例,读取器451、452和453可以是多种传感器中的任何一种,包括磁的、光电的、磁光的、电子的等等。
在上述极详细地描述的数据存储介质中,在数据存储介质中的每个数据区都对应多于一个伺服区,使得在多个数据区之一的数据操作中(例如读或写)(当数据存储介质在方向460上相对读装置450移动时),该多于一个的对应伺服区在对应于该数据操作的离散时间(例如该数据操作之前和期间)向读装置450的读取器451、452和453提供定位信息。不同于上面说明的示例性实施例,在图4的示例性数据存储系统中,读装置450被提供有冗余数量的读取器。在这方面,即使每个数据存储区只与两个伺服区关联,读装置450也包括三个读取器。例如,在数据区423(在该处数据存储介质在方向460上相对读装置450移动)的写操作中,读装置450在对应于写操作(该操作可以由未在图4中图解说明的写装置执行,这是本领域技术人员容易理解的)的两个离散时间获取定位信息。当伺服区422经过读装置450的读取器452的下方时,读取器452获取在写操作开始时的定位信息。当伺服区413和433分别经过读取器451和453的下方时,这些读取器获取关于写操作进行到1/2时的定位信息。如果读取器451或453中的一个被损坏,这种冗余配置仍然许可与每个数据操作的多次同步。
虽然在上述示例性实施例中,数据存储系统已经被说明为包括具有读取器的读装置,该读取器被配置为从直接相邻的磁道读取伺服消息,但是本发明的范围并不限于该特定的布置。更确切地,参考图5可以看出,数据存储介质可以被配置有在非相邻数据磁道中的多个伺服区,同时仍然维持在单个数据操作中的多次同步的益处。
图5图解说明根据主题公开的一个方面的数据存储系统的局部视图。图5的数据存储系统包括数据存储介质(这里由5个平行的数据磁道501-505表示),所述数据存储介质包括多个数据区(511、512、514、515、516、517、519、520、522和524)和多个伺服区(513、518、521和523)。数据存储系统进一步包括读装置550,该读装置包括多个读取器(551、552和553)。与上面说明的示例性实施例不同,在图5的示例性数据存储系统中,读装置550的读取器间隔开近似于1倍的磁道501-505的磁道宽度。此外,每个伺服区为2倍的磁道501-505的磁道宽度,并且横跨两个相邻的磁道。因此,读装置550能够从处于磁道中的伺服区获取定位信息,这些伺服区不与在其上正在进行数据操作的数据区相邻。例如,在数据区519(在此数据存储介质在方向560上相对于读装置550移动)的读操作中,读装置552在对应于读操作的若干离散时间获取定位信息。当伺服区518经过读装置550的读取器552的下方时,读取器552获取读操作开始时的定位信息。当伺服区513和523分别地经过读取器551和553的下方时,这些读取器分别获取关于整个读操作的大约1/3和2/3时的定位信息。
虽然在上述示例性实施例中,伺服区被说明为在跨两个相邻的数据磁道延伸(并且读装置的读取器间隔单个磁道宽度),但是本发明的范围并不限于这样的布置。更确切的,对于本领域技术人员来说显而易见的是,数据存储介质可以被提供有延伸跨过许多数据磁道(例如跨过10个磁道,100或1000个磁道等)的伺服区。事实上,为了便于这种数据存储介质的生产,相比较于提供延伸跨过较少数据磁道的大量伺服区,提供延伸跨过大量数据磁道的伺服区是有利的。相似地,虽然在上述示例性实施例中,读装置被说明为包括间隔单个磁道宽度放置的读取器,但是本发明的范围并不限于这样的布置。更确切地,对于本领域技术人员来说显而易见的是,数据存储系统可以被提供有读装置,在该读装置中,多个读取器被间隔数据存储介质的任意多个磁道宽度(伴随着媒体设计,在该设计中伺服区横跨对应数量的数据磁道延伸)。
此外,虽然已经在图5的示例性实施例中说明的数据磁道和伺服区是直线的,但是对本领域技术人员来说显而易见的是,在不相邻的数据磁道中的伺服区的配置能够应用在具有圆周的数据磁道的实施例中。
虽然在上述示例性实施例中,数据存储系统被说明为具有刚好有三个读取器的读装置,但是本发明的范围并不限于这样的布置。更确切地,对于本领域技术人员来说显而易见的是,本发明可以被应用到这样的数据系统,在该数据系统中读装置具有多于一个的任意数量的读取器。根据主题公开的一个方面,增加读取器的数量可以在单个数据操作期间提供更多的同步(例如具有5个读取器的读装置可以提供对应单个数据操作的5个时间同步,具有10个读取器的读装置可以提供10个时间同步,等等)。根据另一方面,增加读取器的数量可以在面临读取器失效时给出更多的冗余和弹性(如同上述参考示例性图4所说明的)。根据主题公开的另一方面,冗余性和改进的同步能够与读取器数量上和伺服磁道宽度上(例如,10个读取器,每个跨越两个磁道的伺服,等等)的适当增加相结合。
虽然在上述示例性实施例中,读装置的读取器被说明和描述为只在径向或穿过磁道的方向上被间隔开,但是本发明的范围并不限于这样的布置。更确切地,考虑到便于生产或者其他设计考虑,读装置可以被提供有多个读取器,这些读取器在圆周方向或沿着磁道的方向被间隔开。例如,转到图6,根据本主题公开的一个示例性方面的数据存储系统被部分图解说明。图6的数据存储系统包括数据存储介质(这里由两个平行的数据磁道601和602表示),该数据存储介质包括多个数据区(611、613、614和615)和多个伺服区(612和615)。该数据存储系统进一步包括有两个读取器(651和652)的读装置650。与上面说明的示例性实施例不同,在图6的示例性数据存储系统中,读装置650的读取器在穿过磁道的方向上和沿着磁道的方向上都被间隔开。这样的间隔便于读装置650的生产(例如在读取器651和652使用半导体处理技术被生产的情况下,更容易在分离的多层材料中生产这些读取器)。如在上述极详细描述的数据存储媒体中一样,在数据存储介质中的每个数据区都对应多于一个伺服区,使得在数据区之一的数据操作(例如,读或写)中(当数据存储介质在方向660上相对读装置650移动时),多于一个的对应伺服区在对应于该数据操作的离散时间(例如,之前或期间)向读装置650的读取器651和652提供定位信息。例如,在数据区616(在此数据存储介质在方向660上正在相对读装置650移动)的写操作中,读装置650在对应于该写操作(该写操作由未在图6中说明的写装置执行,但是对于本领域技术人员来说是容易理解的)的两个离散时间获取定位信息。当伺服区615经过读装置650的读取器652下方时,读取器652获取写操作开始时的定位信息。当伺服区615经过读装置650的读取器651下方时,读取器651获取数据区616的写操作进行到大约1/2时的定位信息。
提供对本发明的描述使本领域的任何技术人员能够实践在这里描述的不同实施例。虽然本发明特别地参考不同附图和实施例加以描述,但是应当理解的是,这些只是出于说明的目的,而不应该被用来限制本发明的范围。
可能还有实施本发明的其他方式。在不背离本发明精神和范围的情况下,可对这里描述的不同功能和元件进行分割,以不同于所显示的那些功能和元件。对这些实施例不同的修改对于本领域技术人员来说是显而易见的,并且这里定义的一般原理可以被应用到其他的实施例。因此,在不背离本发明精神和范围的情况下,可以由本领域普通技术人员对本发明进行许多改变和修改。
除非是特别地声明,提到单个元件并不意味着“一个且只有一个”而是“一个或更多个”。术语“一些”指一个或多于一个。加下划线的和/或斜体的标题和子标题只是为了方便,而不是限制本发明,并且不涉及到与本发明的描述的解释的联系。和贯穿本公开中所描述的本发明的不同实施例的元件等同的所有结构和功能等同物都是本领域普通技术人员公知的或以后将要被公知的,这些等同物作为参考合并于此并且旨在被包含在本发明中。此外,无论本公开是否在上述描述中被明确地叙述,在这里所公开的内容都不意图针对公众。
Claims (25)
1.一种数据存储介质,包括:
多个数据区;以及
被配置为向读装置提供定位信息的多个伺服区;
其中所述多个数据区中的每一个数据区都对应于所述多个伺服区中的多于一个伺服区,并且
其中,所述多个伺服区中的多于一个伺服区被配置为在对应于相应数据区的数据操作的离散时间向所述读装置提供定位信息。
2.根据权利要求1所述的数据存储介质,其中,所述多个伺服区中的多于一个伺服区被配置为在相应数据区的数据操作之前或期间向所述读装置提供定位信息。
3.根据权利要求1所述的数据存储介质,其中,所述多个伺服区中的每个伺服区都对应于所述多个数据区中的多于一个数据区。
4.根据权利要求3所述的数据存储介质,其中,所述多个伺服区之一被配置为在所述多个数据区的第一子集数据区的数据操作之前和在所述多个数据区的第二子集数据区的数据操作期间向所述读装置提供定位信息。
5.根据权利要求1所述的数据存储介质,其中,所述多个数据区包括多个圆周数据磁道,并且其中所述多个伺服区的多于一个伺服区被沿圆周隔开。
6.根据权利要求5所述的数据存储介质,其中,对于每个所述圆周数据磁道,所述多个伺服区中的多于一个伺服区包括与所述圆周数据磁道同径放置的第一伺服区和与所述第一伺服区在圆周上隔开并且在径向上远离所述圆周数据磁道的第二伺服区。
7.根据权利要求6所述的数据存储介质,其中,所述第一伺服区被配置为在所述相应数据磁道的数据操作之前向所述读装置提供第一定位信息,并且其中所述第二伺服区被配置为在所述相应数据磁道的所述数据操作期间提供第二定位信息。
8.根据权利要求1所述的数据存储介质,其中,所述数据存储介质包括磁数据介质或光数据介质。
9.根据权利要求1所述的数据存储介质,其中,所述数据存储介质包括磁带。
10.根据权利要求1所述的数据存储介质,其中,所述数据存储介质包括硬盘盘片。
11.根据权利要求1所述的数据存储介质,其中,所述数据存储介质包括连续的介质、离散的磁道介质和位模式介质之一。
12.一种数据存储系统,包括:
数据存储介质,所述数据存储介质具有多个数据区和多个伺服区;以及
读装置,所述读装置被配置为在所述多个数据区之一的数据操作之前从所述多个伺服区之一接收第一定位信息并且在所述多个数据区之一的数据操作期间从所述多个伺服区的另一个接收第二定位信息。
13.根据权利要求12所述的数据存储系统,其中,所述多个数据区中的每一个都对应于所述多个伺服区中的多于一个伺服区。
14.根据权利要求12所述的数据存储系统,其中,所述多个伺服区中的每一个都对应于所述多个数据区中的多于一个数据区。
15.根据权利要求14所述的数据存储系统,其中,所述多个伺服区之一被配置为在所述多个数据区的第一子集数据区的数据操作之前和在所述多个数据区的第二子集数据区的数据操作期间向所述读装置提供定位信息。
16.根据权利要求12所述的数据存储系统,其中,所述多个数据区包括多个圆周数据磁道,并且其中所述多个伺服区中的多于一个伺服区被沿圆周隔开。
17.根据权利要求16所述的数据存储系统,其中,对于每个所述圆周数据磁道,所述多个伺服区的多于一个伺服区包括与所述圆周数据磁道同径放置的第一伺服区和在圆周上与所述第一伺服区隔开并且在径向上远离所述圆周数据磁道的第二伺服区。
18.根据权利要求16所述的数据存储系统,其中,所述读装置包括多个径向隔开的磁阻磁头。
19.根据权利要求18所述的数据存储系统,其中,所述多个磁阻磁头也被沿圆周隔开。
20.根据权利要求18所述的数据存储系统,其中,所述第一伺服区被配置为在所述相应数据磁道的数据操作之前向所述多个磁阻磁头的第一个磁阻磁头提供第一定位信息,并且其中所述第二伺服区被配置为在所述相应数据磁道的所述数据操作期间向所述多个磁阻磁头的第二个磁阻磁头提供第二定位信息。
21.根据权利要求12所述的数据存储系统,其中,所述数据存储介质包括磁数据介质或光数据介质。
22.根据权利要求12所述的数据存储系统,其中,所述数据存储介质包括磁带。
23.根据权利要求12所述的数据存储系统,其中,所述数据存储介质包括硬盘盘片。
24.根据权利要求12所述的数据存储系统,其中,所述数据存储介质包括连续的介质、离散的磁道介质和位模式介质之一。
25.一种数据存储系统,包括:
读装置;以及
数据存储介质,所述数据存储介质包括:
多个数据区;和
多个被配置为向所述读装置提供定位信息的伺服区;
其中,所述多个数据区中的每一个数据区都对应于所述多个伺服区中的多于一个伺服区,并且
其中,所述多个伺服区中的多于一个伺服区被配置为在对应于相应数据区的数据操作的离散时间向所述读装置提供定位信息。
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Also Published As
Publication number | Publication date |
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CN101826360B (zh) | 2014-09-24 |
HK1144726A1 (zh) | 2011-03-04 |
US8203800B2 (en) | 2012-06-19 |
US20100226038A1 (en) | 2010-09-09 |
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