文件系统

LPC2148 of ARM7-TDMI configuration was adopted as main controlling chip, and its software design was completed by multitask scheduler based on UCOS-Ⅱ, while the FAT system controlled the read-write to the files in SD card. The signal emergence, change in hearing class, frequency selection as well as records of subject reaction were automatically achieved.

系统采用了ARM7-TDMI架构的LPC2148为主控芯片，软件设计上采用了基于UCOS-Ⅱ的多任务调度机制，以FAT文件系统的方式对SD卡的文件进行读写操作，信号的出现、听力级的改变、频率的选择以及受试者反应的记录均由系统自动完成，自动实现听力损伤评级。

The basic organization of the UNIX filesystem, the idea of using a user process for the command interpreter, the general organization of the filesystem interface, and many other system characteristics come directly from Multics.

Unix 文件系统的基本组织，为命令解释器使用一个用户进程的理念，文件系统接口的总体结构以及许多其他的系统特性直接来自于 Multics 。

This system's purpose is to manage file system and coordinate their co-existence.

该系统的作用是管理文件系统和协调多种文件系统之间的共存。

Command: d Partition number (1-11): 6 Command: n Command action l logical (5 or over) p primary partition (1-4) l First cylinder (5001-20886, default 5001): Using default value 5001 Last cylinder or +size or +sizeM or +sizeK (5001-7500, default 7500): Using default value 7500 Command: p Disk /dev/sda: 171.7 GB, 171798691840 bytes 255 heads, 63 sectors/track, 20886 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 1250 10040593+ 7 HPFS/NTFS /dev/sda2 1251 20886 157726170 5 Extended /dev/sda5 1251 2500 10040593+ 7 HPFS/NTFS /dev/sda6 7501 10000 20081218+ b W95 FAT32 /dev/sda7 10001 20886 87441763+ 7 HPFS/NTFS /dev/sda8 2501 3000 4016218+ 83 Linux /dev/sda9 3001 3125 1004031 82 Linux swap / Solaris /dev/sda10 3126 5000 15060906 83 Linux /dev/sda11 5001 7500 20081218+ 83 Linux Partition table entries are not in disk order Command: t Partition number (1-11): 11 Hex code: 7 Changed system type of partition 11 to 7 Command: p Disk /dev/sda: 171.7 GB, 171798691840 bytes 255 heads, 63 sectors/track, 20886 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 1250 10040593+ 7 HPFS/NTFS /dev/sda2 1251 20886 157726170 5 Extended /dev/sda5 1251 2500 10040593+ 7 HPFS/NTFS /dev/sda6 7501 10000 20081218+ c W95 FAT32 /dev/sda7 10001 20886 87441763+ 7 HPFS/NTFS /dev/sda8 2501 3000 4016218+ 83 Linux /dev/sda9 3001 3125 1004031 82 Linux swap / Solaris /dev/sda10 3126 5000 15060906 83 Linux /dev/sda11 5001 7500 20081218+ 7 HPFS/NTFS Partition table entries are not in disk order Command m for help

到这里，就已经将原先的windows的E盘（2501到5000柱面），那个/dev/sda6分成了三个区。现在如果保存分区操作后，再使用格式化工具创建文件系统后，原先的 2501到5000柱面上的数据将丢失。当然，我们不必担心，因为事先已经将文件复制到了其它的地方了。注意：现在有一个问题，看上面/dev/sda11 的尾柱面是 5000 ，而/dev/sda6的首柱面是5001 。一直到/dev/sda8 的首柱面都位于/dev/sda11的尾柱面之后。也就是说它们的物理位置在后面，但分区编号在前面。为改变这一状况，有一个简易的方法。就是先删紧靠 5000柱面之后的一个分区，然后立即按默认首柱面和尾柱面进行分配，在重建分区表的时候注意把分区的系统标识也改也原先的（因为 Linux的fdisk中默认的新建的分区系统标识为id为83。

This offers ISO9660, Joliet, Romeo (Short File-names vs. Long File-names on mastered CDs),Big Endian, Little Endian (Windows vs. Unix, Mac and other systems' defaults),Rock Ridge (eg for Commodore users, Server use, etc.),mounts VIDEO and AUDIO IFO / BUP / VOB file-systems independently from other file-systems ,transparent support for DVD+VR discs, remapping of the content etc,Open +VR discs' files can be seen and extracted right away.

这提供了iso9660 ， Joliet的，罗密欧（短文件的名称与长期档案的名称就掌握光碟），大尾段，小尾段（在Windows与Unix的， Mac和其他系统的默认值），岩石岭（例如台Commodore用户，服务器使用等），安装视频和音频的IFO / bup / vob的文件系统独立於其它文件系统的，透明的支持的DVD +村代表光碟，重映的内容等，开放+村代表光碟档案可以看出，和提取的权利。

Divorcing file system metadata operations from actual file data operations improves immediate performance, but also improves long-term aspects of the file system such as recoverability and availability.

从实际文件数据操作中脱离文件系统元数据操作提升了即时性能，同时也提高了文件系统的长期的方面，例如可恢复性和可用性。

Similar to the Linux operating system version 0.11 of documentation systems design and Windows the procedure, the use of pape...

类似Linux操作系统0.11版文件系统的文件系统设计和Windows下的操作程序，使用文件作为虚拟磁盘。

I decided to make my encrypted filesystem live in a regular file rather than its own partition. This requires less tweaking of the disk, and makes mounting and unmounting the encrypted filesystem easier, as you will see later.

您可将加密文件系统保存在一个特定的文件当中而不是单独分区，这样不要对磁碟做太多的调整便让对加密文件系统的登录和退出操作变得更加容易。

I decided to make my encrypted filesystem live in a regular file rather than its own partition. This requires less tweaking of the disk, and makes mounting and unmounting the encrypted filesystem easier, as you will see later.

您可将加密文件系统保存在一个特定的文件当中而不是单独分区，这样不要对磁盘做太多的调整便让对加密文件系统的登录和退出操作变得更加容易。

Windows9x series using a FAT file system, due to the form of links, at the beginning of the beginning of the various sectors of documents stored in a row, but with the additional documentation to establish, delete and other operations, the newly created file on the beginning of the distribution of in non-consecutive disk sectors, the middle of the distribution sector there are other documents and / or space sector.

Windows9x系列用的是FAT文件系统，由于采用链接表的形式，在刚开始的时候文件的各个扇区是连续存放的，但随着更多文件建立、删除等操作，新建立的文件就开始分布于不连续的磁盘扇区，中间分布有其它文件的扇区和/或空扇区。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。