菜鸟提一个问题 望高手解答

zorin

加载usb2.0后启动pe 用的是usb40.ima 批处理到 Searching USB DEVICE......
之后开始提示写入Ａ盘失败　然后提示忽略　重试　之类的
pe大小为25M
usb40大小为40M


Ｕ盘使用syslinux做引导
菜单项

LABEL usb2
MENU LABEL [ ^0 ] USB2.0
MENU INDENT 2
kernel /boot/syslinux/memdisk
append initrd=/boot/imgs/usb2.gz

批处理
@echo off

cls
path a:\
echo Searching USB DEVICE......
set UDrv=
set PeFlag=minipe\pe

if exist z:\%PeFlag% set UDrv=z:
IF not "%UDrv%"=="" GOTO ufind
if exist y:\%PeFlag% set UDrv=y:
IF not "%UDrv%"=="" GOTO ufind
if exist x:\%PeFlag% set UDrv=x:
IF not "%UDrv%"=="" GOTO ufind
if exist w:\%PeFlag% set UDrv=w:
IF not "%UDrv%"=="" GOTO ufind
if exist v:\%PeFlag% set UDrv=v:
IF not "%UDrv%"=="" GOTO ufind
if exist u:\%PeFlag% set UDrv=u:
IF not "%UDrv%"=="" GOTO ufind
if exist t:\%PeFlag% set UDrv=t:
IF not "%UDrv%"=="" GOTO ufind
if exist s:\%PeFlag% set UDrv=s:
IF not "%UDrv%"=="" GOTO ufind
if exist r:\%PeFlag% set UDrv=r:
IF not "%UDrv%"=="" GOTO ufind
if exist q:\%PeFlag% set UDrv=q:
IF not "%UDrv%"=="" GOTO ufind
if exist p:\%PeFlag% set UDrv=p:
IF not "%UDrv%"=="" GOTO ufind
if exist o:\%PeFlag% set UDrv=o:
IF not "%UDrv%"=="" GOTO ufind
if exist n:\%PeFlag% set UDrv=n:
IF not "%UDrv%"=="" GOTO ufind
if exist m:\%PeFlag% set UDrv=m:
IF not "%UDrv%"=="" GOTO ufind
if exist l:\%PeFlag% set UDrv=l:
IF not "%UDrv%"=="" GOTO ufind
if exist k:\%PeFlag% set UDrv=k:
IF not "%UDrv%"=="" GOTO ufind
if exist j:\%PeFlag% set UDrv=j:
IF not "%UDrv%"=="" GOTO ufind
if exist i:\%PeFlag% set UDrv=i:
IF not "%UDrv%"=="" GOTO ufind
if exist h:\%PeFlag% set UDrv=h:
IF not "%UDrv%"=="" GOTO ufind
if exist g:\%PeFlag% set UDrv=g:
IF not "%UDrv%"=="" GOTO ufind
if exist f:\%PeFlag% set UDrv=f:
IF not "%UDrv%"=="" GOTO ufind
if exist e:\%PeFlag% set UDrv=e:
IF not "%UDrv%"=="" GOTO ufind
if exist d:\%PeFlag% set UDrv=d:
IF not "%UDrv%"=="" GOTO ufind
if exist c:\%PeFlag% set UDrv=c:
IF not "%UDrv%"=="" GOTO ufind
if exist b:\%PeFlag% set UDrv=b:
IF not "%UDrv%"=="" GOTO ufind
if exist a:\%PeFlag% set UDrv=a:
IF not "%UDrv%"=="" GOTO ufind
GOTO ERR_FindUDrv
:ufind
a:
cd\
if not exist grub.exe copy %UDrv%\boot\grub\grub.exe
cd minipe

copy %UDrv%\minipe\pe

copype %UDrv%
cd\

grub.exe --config-file="root (fd0);chainloader (fd0)/ldrxpe"
goto end
:ERR_FindUDrv
cls
echo USB Device Not Found.
goto end
:ERR_CopyFile
echo Not found "PE" file!
goto END
:END

zorin

如果按f 会接着往下执行　copy %UDrv%\minipe\pe 命令
一样会提示写入Ａ盘失败