Am 20.10.19 um 02:06 schrieb Curtis Vaughan: > After updates I decided to reboot, but it would never reboot until I > removed the new drive. I'm wondering if it has something to do with > needing to installl grub on the new drive? surely, a workaround would have been switch the cables so that the first disk is the one which still has grub grub is at the begin of the drive outisde the array itself and so for real working redundacy and i posted you days ago my script for drive replacemnets which clearly installs grub on the new one [root@srv-rhsoft:~]$ cat /scripts/raid-recovery.sh #!/usr/bin/bash GOOD_DISK="/dev/sda" BAD_DISK="/dev/sdd" # -------------------------------------------------------------------------- echo "NOT NOW" exit # -------------------------------------------------------------------------- # clone MBR dd if=$GOOD_DISK of=$BAD_DISK bs=512 count=1 # force OS to read partition tables partprobe $BAD_DISK # start RAID recovery mdadm /dev/md0 --add ${BAD_DISK}1 mdadm /dev/md1 --add ${BAD_DISK}2 mdadm /dev/md2 --add ${BAD_DISK}3 # print RAID status on screen sleep 5 cat /proc/mdstat # install bootloader on replacement disk grub2-install "$BAD_DISK"