On 01/11/2023 01:33 PM, H wrote: > On 01/11/2023 02:09 AM, Simon Matter wrote: >> What I usually do is this: "cut" the large disk into several pieces of >> equal size and create individual RAID1 arrays. Then add them as LVM PVs to >> one large VG. The advantage is that with one error on one disk, you wont >> lose redundancy on the whole RAID mirror but only on a partial segment. >> You can even lose another segment with an error on the other disk and >> still have redundancy if the error is in another part. >> >> That said, it's a bit more work to setup but has helped me several times >> in the decades ago. >> >> > But is your strategy of dividing the large disk into individual RAID1 arrays also applicable to SSDs? I have heard, perhaps incorrectly, that once a SSD fails, the entire SSD becomes unusable which would suggest that dividing it into multiple RAID1 arrays would not be useful? > 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. Thanks.