On 24/06/2022 23:08, Roman Mamedov wrote:
On Fri, 24 Jun 2022 23:00:02 +0100
Wol <antlists@xxxxxxxxxxxxxxx> wrote:
So your boot device is currently in physical connector 1 on the mobo. If
you move it across, you need to make sure it stays in physical position
1, otherwise the mobo will try to boot off whatever disk is in position
1, and there won't be a boot system to boot off!
Using RAID1 across all disks with metadata 0.90 for /boot makes sure the BIOS
can boot no matter which disk it tries first.
In fact it could be with recent grub the "0.90" part is not even required
anymore.
Just make sure to "grub-install /dev/sdX" at least once to all of them.
Don't use 0.9, use 1.0.
Both of these put the superblock at the end, so the start of the array
on disk is also the start of the data area. Which means you can bypass
the raid (normally a bad idea, but here you need it).
Thing is, v0.x is deprecated, if it breaks it won't be fixed. v1.x is
supported, all the x indicates is the location of the superblock, it's
identical across all 1.x arrays.
1.0 is at the end, not necessarily a good idea. To be avoided where
possible.
1.1 is at the start. Where any problems with a rogue partitioner will
trample it. To be avoided.
1.2 leaves a 4K scratch space and puts the superblock after that. So it
will survive most damage to the start of a partition. Recommended.
Cheers,
Wol
