简单扫盲
SCSI(Small Computer System Interface)
is a set of standards for physically connecting and transferring data between computer and peripheral devices.SCSI is most commonly used for hard disks and tape drives,but it can connect a wide range of other devices including scanners and CD drives.
ATA
ATA is short for AT COMPUTER attachment,means AT computer s attachment.You can easilly use ATA to connect harddisk on PC.
ATA is commonly consist of PATA(parallel ATA ) and SATA(serial ATA).
为了编译自己的内核，需要弄清楚各自的驱动。
为了知道自己的机器的具体硬件信息，请参考这篇文章：
host or north bridge
Host bride is called north bridge also, which is one of the two chips in core logic chipset architecture on a PC motherboard, the orther being the southbridge.
北桥需要运行高速度的任务，利用front-side bus(FSB)直接与cpu相连。与南桥一起共同(I/O控制集群)为cpu与其他设备的通信提供接口。
参观： https://en.wikipedia.org/wiki/Northbridge_(computing)