解决了如下问题：
1.启动的时候报错，需要等30秒才能启动的问题
错误日志如下：
kernel:ata2:softresettingport
kernel:ata2:softresetfailed(1stFISfailed)
kernel:ata2:portfailedtorespond(30secs)
kernel:ata2:COMRESETfailed(devicenotready)
5.1解决了这个问题，据说是某个内核版本的问题。
2.解决了DELLVostro200网卡驱动和其他设备驱动的问题
其实就是集成了Intel的ICH9系列的驱动，包括IntelCorporation82G33/G31/P35/P31。自动识别设备如下：
#lspci
00:00.0Hostbridge:IntelCorporation82G33/G31/P35/P31ExpressDRAMController(rev02)
00:01.0PCIbridge:IntelCorporation82G33/G31/P35/P31ExpressPCIExpressRootPort(rev02)
00:02.0VGAcompatiblecontroller:IntelCorporation82G33/G31ExpressIntegratedGraphicsController(rev02)
00:19.0Ethernetcontroller:IntelCorporation82562V-210/100NetworkConnection(rev02)
00:1a.0USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#4(rev02)
00:1a.1USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#5(rev02)
00:1a.2USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#6(rev02)
00:1a.7USBController:IntelCorporation82801I(ICH9Family)USB2EHCIController#2(rev02)
00:1b.0Audiodevice:IntelCorporation82801I(ICH9Family)HDAudioController(rev02)
00:1d.0USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#1(rev02)
00:1d.1USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#2(rev02)
00:1d.2USBController:IntelCorporation82801I(ICH9Family)USBUHCIController#3(rev02)
00:1d.7USBController:IntelCorporation82801I(ICH9Family)USB2EHCIController#1(rev02)
00:1e.0PCIbridge:IntelCorporation82801PCIBridge(rev92)
00:1f.0ISAbridge:IntelCorporation82801IR(ICH9R)LPCInterfaceController(rev02)
00:1f.2RAIDbuscontroller:IntelCorporation82801SATARAIDController(rev02)
00:1f.3SMBus:IntelCorporation82801I(ICH9Family)SMBusController(rev02)
之前的RHEL5就算我手动装上Intel的网卡驱动，网卡还是显示为unknowndevice。
使用5.1以后，在安装的过程中就自动识别了网卡。
这是RHEL5识别的硬件设备，同样的硬件配置：
#lspci
00:00.0Hostbridge:IntelCorporationDRAMController(rev02)
00:01.0PCIbridge:IntelCorporationPCIExpressRootPort(rev02)
00:02.0VGAcompatiblecontroller:IntelCorporationIntegratedGraphicsController(rev02)
00:19.0Ethernetcontroller:IntelCorporationUnknowndevice10c0(rev02)
00:1a.0USBController:IntelCorporationUSBUHCIController#4(rev02)
00:1a.1USBController:IntelCorporationUSBUHCIController#5(rev02)
00:1a.2USBController:IntelCorporationUSBUHCIController#6(rev02)
00:1a.7USBController:IntelCorporationUSB2EHCIController#2(rev02)
00:1b.0Audiodevice:IntelCorporationHDAudioController(rev02)
00:1d.0USBController:IntelCorporationUSBUHCIController#1(rev02)
00:1d.1USBController:IntelCorporationUSBUHCIController#2(rev02)
00:1d.2USBController:IntelCorporationUSBUHCIController#3(rev02)
00:1d.7USBController:IntelCorporationUSB2EHCIController#1(rev02)
00:1e.0PCIbridge:IntelCorporation82801PCIBridge(rev92)
00:1f.0ISAbridge:IntelCorporationUnknowndevice2916(rev02)
00:1f.2RAIDbuscontroller:IntelCorporation82801HR/HO/HH(ICH8R/DO/DH)SATARAIDController(rev02)
00:1f.3SMBus:IntelCorporationSMBusController(rev02)
3.可以使用yum自动升级
CentOS最爽的地方，不止免费获取，而且可以自动升级。
关于CentOS，CentOS其实就是RHEL的重新打包发布版，去掉了Redhat的标志，fix了一些bug（因为它比对应的RHEL版本晚发布。）
Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1Red Hat Enterprise Linux 5换成CentOS 5.1
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