Hi all guy´s. Does anybody know if the drivers for DOS USB users, the usbaspi.sys and di1000dd.sys work with large usb disk, like 160G, or what is the capacity limit of them? I believe that since they are UMS´s, they mey be able to access them, but I don´t know the maximum disk size that these drivers support. If that is right, I´ll will use it to store data as a large backup in place of DVD´s or CD´s. Thanks in advance for that data. Best regards. Osvaldo. Barrio Garay. Almirante Brown (1846)Buenos Aires. Argentina. If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.

Probably the partttion limit of about 137GB with the newer fdisk. ===================================== If at first you don't succeed, you're about average. M2

I think the drivers are not the problem, the problem can be with older dos versions. They don't implement large disk support so they are limited to something like 8 GB IIRC. Newer dos (FreeDos, Enhanced DR-Dos, dos subsystem of Windows 9x ...) can use more than 8 GB.