分析了硬盘容量限制的成因以及LBA 48b寻址模式对137．4GB容量的突破。在此基础上进一步分析

了Vxworks平台下不能识别超过137．4GB容量硬盘的原因。然后根据硬盘LBA 48b寻址模式的原理，分析如

何修改Vxw0rks平台下的ATA驱动程序，最终达到支持大容量硬盘的能力-Analysis of the causes of hard drive capacity, as well as addressing mode LBA 48b breakthrough capacity of 137.4GB. On the basis of further analysis can not be identified under Vxworks platform over the causes of hard drive capacity 137.4GB. LBA 48b based on the hard disk of the principle of addressing modes, analysis of how to modify the platform Vxw0rks procedures under the ATA drive, and ultimately achieve the support of large-capacity hard drive capacity