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It's a fully supported use case of mdadm RAID to use bare devices. These are data disks containing no operating system, so there's no booting from them and GRU
by nh2 8y ago
It's a fully supported use case of mdadm RAID to use bare devices.
These are data disks containing no operating system, so there's no booting from them and GRUB doesn't come into play.
- kbumsik 8y agoOh I read the context wrong. I thought he/she used the disks as a bootable disk as well. But do the disks have to have a proper GPT to be safe?
- adamzochowski 8y agoNo. Just like all hardware based raids you can set mdadm to use full raw disk. The GPT is only useful when you want to use part of the disk for RAID - partitioning disk into multiple parts where only some of it will be raided. Some people prefer opposite. First raid raw disks and then partition that md storage. The other reason to put GPT (or old style partition table) is so that no system or tool will mistakenly be helpful with detrcting "uninitiated drive" and then asking to perform quick format.