ON Ctrl+M LSI Software RAID Configuration Utility Configure Clean Configuration Debian Live KDE Konsole sudo apt-get update sudo apt-get install dmraid sudo /usr/sbin/dmraid -r /usr/sbin/dmraid -r sudo wipefs -n /dev/sda sudo wipefs -n /dev/sdb (DEVICE OFFSET TYPE UUID LABEL sda 0x1fe dos and so for sdb too: OK!) sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda /dev/sdb cat /proc/mdstat (to choose integration with LVM...) sudo pvcreate /dev/md0 (made /dev/md0) sudo vgcreate myvg /dev/md0 (made Volume Group VG) sudo lvcreate -L 50G -n lv_root myvg (made a logical volume lv_root, 50 GB) sudo mkfs.ext4 /dev/myvg/lv_root (made filesystem on lv_root) sudo mkdir /mnt/root sudo mount /dev/myvg/lv_root /mnt/root (so lv_root is mounted) sudo mdadm --detail --scan | sudo tee -a /etc/mdadm/mdadm.conf (mdadm configuration) sudo update-initramfs -u (problem: "I: update-initramfs is disabled (live system is running on read only media")) sudo shutwown -h now (first session's end).
Question: It would be better if I would have made /boot too? Tomorrow: Debian 12 Installation ... ... Hard disks Partition Manual make logical volumes for swap, home, log and var (and boot too?) inside vg .... .... installation end ... open intaller shell mount /dev/mapper/vg-lv_root /target mount --bind /dev /target/dev mount --bind /sys /target/sys mount --bind /proc /target/proc chroot /target mdadm --detail --scan | tee -a /etc/mdadm/mdadm.conf update-initramfs -u -k all apt update apt install --reinstall grub-pc exit umount /target/sys /target/proc /target/dev umount /target Anything wrong? Thanks. CPA ________________________________ Da: Frank Guthausen Inviato: Giovedì, 24 Aprile, 2025 18:36 A: debian-user@lists.debian.org Oggetto: Re: R: R: R: Grub problem On Thu, 24 Apr 2025 14:24:14 +0000 Pier Antonio Corradini <pierantonio.corrad...@gmail.com> wrote: > This RAID is a RAID > “firmware” (aka “fakeraid”). It seems better mdadm (array: /dev/mdX) > instead of dmraid (with the activation by dmraid -ay; array: > /dev/mapper) but does legacy BIOS "impose" the use of dmraid? If you don't need the hardware RAID (e.g. for dual boot Windows) you might try deactivate it and use Debian softraid with mdadm only. This should work in any case, because once the Linux kernel is started it takes control and does usually a very good job. You should install grub to both devices, e.g. /dev/sda and /dev/sdb in your case, and grub will understand to boot from /dev/mdX softraid devices. Everything on top of the softraid devices behaves exactly as on real hard disk partition devices. You'll have a "normal" Debian on disk with an additional mdadm layer, which is completely irrelevant for any kind of normal usage, but protects you a little bit from hardware disk failures. -- kind regards Frank
