hi, Recently i have tried the Linux rootfilesytem booting up as "read only".I have read about the approach using unionfs approach .Below are my steps followed:
1.Edited the ramdisk "init" script to mount the "rootfs" on separate directory. 2.Mounted a writable partition of my hard disk to redirect the files accessed on rootfs. 3.Create a unionfs mount point 4.change root using (chroot) to the unionfs mount point. 5.Normal boot up. The problem comes during reboot.During reboot the "halt" script of my rootfs trying to umount all the partitions mounted using the following command "umount -a".This produces the following error:"Device or resource busy".Actually the dirs for unionfs are mounted in the rootfs. I referred the below link for my approach: http://www.logicsupply.com/blog/2009/01/27/how-to-build-a-read-only-linux-system/ Kindly suggest me a solution to umount all the partitions and make a clean shutdown. Regards, Purusothaman R
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