ATAPI

The ATAPI specification defines a command called IDLE IMMEDIATE that idles the HDD and retracts the disk heads to prevent them from hitting the platters.

ATAPI规范定义了一个名为IDLE IMMEDIATE的命令，它可以闲置HDD并收回磁头以防止它们触及盘片。

Linux uses a SCSI emulation subsystem, so IDE/ ATAPI CD-writers need compatibility drivers.

Linux使用SCSI仿真子系统，因此IDE/ATAPI CD刻录机需要兼容性驱动程序。

It focuses on the implement of USB bus enumeration protocol that is necessary for all USB devices and the implement of USB Mass Storage Bulk-Only transport and ATA/ ATAPI protocols those are necessary for all USB Mass Storage devices.

重点阐述了所有USB设备所必需的USB总线列举协议的固件实现，以及Mass Storage设备所必需的USB Mass Storage Bulk-Only传输和ATA/ATAPI协议的固件实现。