关于DELL990等电脑不能通过MAXDOSPXE网络GHOST的解决办法

1、关于DELL 990等电脑不能通过MAXDOS PXE网络GHOST的解决办法一、故障现象使用MAXDOS PXE网络GHOST时提示如下错误信息：ERROR:Unable to control A20 line!XMS Driver not installed.Warning:the high memory area (HMA) is not available.Additional low memory (below 640K) will be used instead.Memory allocation errorCannot load CO二、解决思路的片断1、查看MAXDOS服务端日

2、志，如下：DHCP服务启动成功.TFTP服务启动成功.0:请求下载文件:C:Documents and SettingsAdministrator桌面maxdos原版MAXDOS.PXE0:下载文件:MAXDOS.PXE-失败0:请求下载文件:C:Documents and SettingsAdministrator桌面maxdos原版MAXDOS.PXE0:下载文件:MAXDOS.PXE-完成0:请求下载文件:C:Documents and SettingsAdministrator桌面maxdos原版MaxDOS71.sys0:下载文件:MaxDOS71.sys-完成2、在网上看到如下来自

3、DELL工程师的说明According to Microsoft, “The A20 line is the start of the first 64K of extended memory, known as the high memory area (HMA). The HIMEM.SYS device driver must control the A20 line to manage extended memory. The HIMEM.SYS driver reports the error if it incorrectly identifies the extended mem

4、ory handling mechanism of the computer or if the handling method of the computers BIOS is unknown.”The workaround that has been shown to be successful on the systems is to add the “/M:1” switch to the HIMEM.SYS line in the CONFIG.SYS file. Some example DOS commands are as follows.DOSDEVICE=C:DOSHIME

5、M.SYS /M:1Windows 98 boot diskDEVICE=C:WINDOWSHIMEM.SYS /M:1The “/M:” or “/MACHINE:” switch tells HIMEM.SYS what machine type it is using to handle high memory from the A20 line. While the “/M:1” switch code has been successful in addressing this issue on the systems, other systems may require diffe

6、rent /M codes. Microsoft indicates that the codes that are most likely to work are /M:1, /M:11, /M:12, and /M:13. If the wrong code is used, HIMEM.SYS may not load properly, or the system may hang and you may need to try another switch.*SOLUTION*Please assist your customer with using the correct /M

7、code as a workaround for the HIMEM.SYS error encountered during the imaging process.3、将确保无故障的单条2G内存插在了最靠近CPU的插槽上，排除了内存本身的问题。4、尝试使用MOUSEDOS进行PXE网刻，但仍然有相同报错。5、尝试使用U盘版GHOST，但仍然有相同报错。三、最终故障原因：正如DELL工程师所言，正是CONFIG.SYS里的HIMEM.SYS参数问题。三、解决办法（MaxDOS71.sys）1、通过3Com Boot Image Editor打开MaxDOS71.sys，提取CONFIG.SYS和CONFIG.EXE（本来只需要编辑CONFIG.SYS，但如果只提取.SYS不提取.EXE，后期会发现编辑的时候内容是乱码）。2、通过VtEdit编辑器打开CONFIG.SYS就能看到内容了。3、按照DELL工程师所言，将文本中device=softhimem.sys修改为device=softhimem.sys /M:1 device=soft