Hi Kernel Alias, I downloaded latest kernel source from kernel.org and tried to build it at a directory outside source by giving O=<path option> but I noticed that initrd image is not getting build but if I execute make inside source things are fine. [Build Kernel/Modules etc inside source] ~/linux-stable/> make ~/linux-stable/> make install ~/linux-stable/> make install_modules ~/linux-stable/> su -c "reboot -f" everything works out fine and system gives me selection to boot from newly build kernel and system boots up without issues. But if I build as below I see system OOPS because no file system found for mount. Would like to know why? [Build outside] ~/linux-stable/> make O=~/linux-build/ ~/linux-stable/> cd ../linux-build/ ~/linux-stable/> make install ~/linux-stable/> make install_modules ~/linux-stable/> su -c "reboot -f" Regards, Vipul.