Hi all, 1. Is RAID-5 fault tolerant? 2. I make a RAID-5 array with 3 disk. The /boot is on RAID-1 partition, the rest are raided 5. When I simulate disk failure by unplugging sda and restarting Centos. Grub fails in stage 1.5. What is the correct way of simulating harddisk failure in RAID-5? If I unplug the other drives, it manages to boot ok. Thank you.