> Follow-up question: Is my proposed strategy below correct: > - Make a copy of all existing directories and files on the current disk using clonezilla. > - Install the new M.2 SSDs. > - Partitioning the new SSDs for RAID1 using an external tool. > - Doing a minimal installation of C7 and mdraid. > - If choosing three RAID partitions, one for /boot, one for /boot/efi and the third one for the rest, do I go with the default mdraid version, ie 1.2 I believe? > - Copying the backup above with contents of the the existing disks, ie not just /root and /home but all other directories and files to the new disks from the clonezilla backup. Note that the new disks will be larger. > - Change the boot sequence in the BIOS and reboot. I don't know if this is still a problem, but in the past, CentOS was only writing the boot-loader on one of the RAID-disks. If this one would fail, the OS would not boot. So you had to make sure to copy the boot-loader onto all RAID-members. Michael