MTD_CHAR provides raw character access to the flash, while MTD_BLOCK projects the flash as a normal block device (like an ide disk), on which a filesystem can be created.

MTD_CHAR提供对闪存的原始字符访问，而MTD_BLOCK将闪存设计为可以在上面创建文件系统的常规块设备(象ide磁盘)。

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The above rule says: match a device which was named by the kernel as hdb AND where the driver is ide-disk. Name the device node with the default name and create a symbolic link to it named sparedisk.

上面规则意思是：匹配一个内核命名为hdb以及驱动为ide-disk的设备，命名设备节点为缺省名字,同时创建一个指向它的名为sparedisk的符号链接。

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Note that SCSI drives are designated sd, while IDE drives are hd. This command displays the existing disk partitions; be sure to use values appropriate for your system.

注意，SCSI硬盘被指定为sd，而IDE硬盘是hd。

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