grub error 17 ---- it is a boot loader issue in my case

I loaded Android 6.x on an windows 8 hard drive , it detected it and loaded grub

but It could not boot

Grub error 17

tried a lots of tricks , no luck

eventually , I used Gparted cd to boot the PC

Gparted found out there is a small space like 8MB in front of the android partition

I deleted all the partition, and re-install the android

Android 6.x boots on my PC