Linux 非RAIDシステムのRAID化 mdadm

既インストールのLinuxをRAIDに移行

インストール時にRAID構成にする

CentOS 7 with Mdadm Software RAID and UEFI Boot – terrydactyl10
CentOS7 UEFI

OpenStack Linux UEFI Software RAID - @//メモ
 CentOS 7 UEFI

CentOS 7 UEFI Install on appliance with mirrored GPT partitions — Lucid Solutions
CentOS 7 UEFI

EFI

https://wiki.archlinux.jp/index.php/EFI_%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%83%91%E3%83%BC%E3%83%86%E3%82%A3%E3%82%B7%E3%83%A7%E3%83%B3%0A

CentOS7でソフトウエアRAID1のHDDを交換したときのメモ - Qiita

efibootmgr

エントリの重複

[SOLVED] Double items in bios boot order page efi/uefi - Linux Mint Forums

How to delete duplicate bootloader from dual-boot setup? - Ask Ubuntu

パーティションのコピー

http://blog.nizyu.xyz/blog/partition_backup_restore/

https://unix.stackexchange.com/questions/12986/how-to-copy-the-partition-layout-of-a-whole-disk-using-standard-tools

sfdisk (MBR)

sfdisk でパーティション情報のコピー - うまいぼうぶろぐ

fdisk - ArchWiki

sdaのパーティション情報をsdbにコピー

sfdisk -d /dev/sda > sda.dump
cat sda.dump
sfdisk /dev/sdb < sda.dump

sgdisk (GPT)

GPT パーティションテーブルを別のディスクにコピーする | d.sunnyone.org

https://askubuntu.com/questions/57908/how-can-i-quickly-copy-a-gpt-partition-scheme-from-one-hard-drive-to-another

GRUB

grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet..

Hmm ... apparently this line was the clue:
grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet..
Previously I had installed btrfs directly on /dev/sda and /dev/sdb. That's why both of them had a FSTYPE and LABEL attached (as shown in lsblk).
Solution: I have now wiped both /dev/sda and /dev/sdb with hdparm (Secure Erase). There is probably a better way to unset those flags ... but this worked for me.
https://unix.stackexchange.com/questions/176843/grub-install-embedding-is-not-possible-in-bios-gpt/176943#176943

以下のエラーが出る場合は
grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet..
# dd if=/dev/zero of=/dev/sdb seek=1 count=2047
を実行してブートセクタから第一パーテションまでを一度消去します．
MBR(bios)でもESP(uefi)でも起動できるgrub2の設定方法 - pyopyopyo - Linuxとかプログラミングの覚え書き -