1 Track = 48 KB1 Cylinder = 720 KB so 1 Cylinder = 15 Tracks Read more: http://ibmmainframes.com/about17868.html#ixzz59X94vGFa…

1.磁盘结构 设备文件:关联至一个设备驱动程序,进而能够与之对应硬件设备进行通信 I/O Ports:I/O 设备地址 一切皆文件:open(),read(),write(),close() 设备类型: 块设备:block,存取单位 “块”,磁盘,支持缓存 字符设备:char,存取单位 “字符”,键盘 设备号码: 主设备号:major number,标识设备类型 次设备号:minor number,表示同一类型下的不同设备 磁盘设备的设备文件命名:/dev/dev_file SCSI,SATA,…

A global cylinder group (CG) cache is stored in file server memory and shared by a plurality of file systems supported by the file server. The global CG cache comprises a number CG entries which are pre-allocated in memory. As different file systems…

"Track changes" is wonderful and remarkable tool of Microsoft Word 2010. The feature allows editing your documents without making the changes permanent. It means if you have deleted a word, Track back highlights it, though the word is deleted bu…

IEEE/ACM International Conference on Advances in Social Network Analysis and Mining (ASONAM) 2014 Industry Track Call for Papers * Apologies if you received multiple copies of this CFP * Beijing China August 17-20, 2014Home Page: www.asonam2014.org F…

我们见到最简单的例子是: <div ng-repeat="link in links" ></div> 如果item的值有重复的,比如links=["1","1","2","2","3"] 那么angularjs 会报错,不允许值重复,原因是angular需要一个唯一值可以与生成的dom绑定,以便追踪. 然后这时候,track by的用处就体现出来了. <d…

上一篇文章(http://www.cnblogs.com/yangdanny/p/4421130.html)我们解决了在FFmpeg下如何处理H264和AAC的扩展数据,根据解出的NALU长度恢复了H264的起始码和AAC的ADTS头,这样一般来说播放是没有问题.本篇文章来谈谈如何实现基于FFmpeg的track mode控制,也就是如何用FFmpeg提供的功能来实现基本的seek.快进.快退.好了,废话少了,下面开始基于FFmpeg的track mode之旅. FFmpeg提供了一个seek函…

错误原因在于出现相同内容. 原写为: <li ng-repeat="log in logs" scroll-down> {{log}}</li> 改写为: <li ng-repeat="log in logs track by $index" scroll-down> {{log}}</li> 加track by $index即可解决.…

ng-repeat指令中使用track by子语句解决重复数据遍历的错误 <li ng-repat="x in [2, 2]" ng-bind="x"></li> 是错误的,认为不能出现重复值(id) <li ng-repat="x in [2, 2] track by $id($index)" ng-bind="x"></li>…

angularjs 使用ng-repeat报错 <div ng-init="words = ['高校','高校','高校']" ng-repeat="word in words"> {{word}} </div> [ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys 发现是因为相同的…