China DOS Union

@echo off
for %%d in (c d e f g h i j k l m n o p q r s t u v w) do (
if exist %%d:\boot.ini (
set drv=%%d:
copy %%d:\boot.ini %%d:\boot.bak
goto end
)
)
:end

Re gmy:

The key improvement of your program is not in simplifying the statements, but in fault tolerance processing, because when going from C: to W:, it is very likely to encounter optical drives with no discs placed, network drives not connected to the network, and some special USB storage devices, etc. Using if exist to detect the existence of boot.iini here will encounter many unexpected problems.

The appearance of the third-party command dready has solved many problems. There have been many programs using it to loop through detecting drive sequences in this forum. You can search more for past posts . But it cannot solve all problems. For specific discussions, see .

Drive Polling Traversal Program Index
9637-12-walu-Drive Polling Traversal-1
http://www.cn-dos.net/forum/viewthread.php?tid=9637

11963-9-walu-Drive Polling Traversal-2
http://www.cn-dos.net/forum/viewthread.php?tid=11963

14620-9-ramjet-Drive Polling Traversal-3
http://www.cn-dos.net/forum/viewthread.php?tid=14620

14667-9-lin8197-Drive Polling Traversal-4
http://www.cn-dos.net/forum/viewthread.php?tid=14667

15599-9-GOTOmsdos-Drive Polling Traversal-5 (Link Bat)
http://www.cn-dos.net/forum/viewthread.php?tid=15599

Some Technical Discussions on HDKP
http://www.cn-dos.net/forum/viewthread.php?tid=12892#pid95281

Wil is really a person with a heart!

re: willsort

Thank you. It has been solved.

@echo off set drv=1 for %%i in (c d e f g h i j k l m n o p q r s t u v w) do if exist %%i:\boot.ini set drv=%%i if %drv%==1 goto err k cls echo OK! %drv%\boot.ini is found! goto end :err cls echo Sorry! boot.ini is not found! goto end :end echo echo pause

[ Last edited by gmy on 2006-1-11 at 13:40 ]

Re gmy:

From the way your current program operates, it will always detect all drives from C to W, rather than immediately exiting as soon as a matching drive letter is detected, to avoid issues with unallocated drive letters and possible access to other drives. This is my modified version. Of course, it still can't fundamentally solve the drive letter access problem, just reduces the probability of problems occurring.

@echo off if "%1"=="" goto ok cls for %%i in (c d e f g h i j k l m n o p q r s t u v w) do if exist %%i:\boot.ini %0 %%i :err echo Sorry! boot.ini is not found! goto end k echo OK! %1\boot.ini is found ! goto end :end echo echo pause

Good post! The boot disk of the original poster I'm using right now, willsort's research on batch processing is really admirable!