7.5 NO hard drive?

Hello

i have 1 DELL Latitude E4300 that had OBSD 7.3 working correctly, but i
decided to do a clean installation of 7.5 deleting everything on it with a
live cd linux; then tested 7.5 and it says NO disk.

After that i tested Linux, NetBSD, FreeBSD all them where installed
without a problem; But, OBSD 7.3 7.4 7.5 said NO disk!

It is something related to OBSD?
What could happened?
How to install OBSD 7.5

PS:
Thanks for the new version 7.5 i run 2 laptops and 1 server with it!

Thanks