Re: raid1 root device with efi

[Andrei Borzenkov <arvidjaar@gmail.com>]

On 27.03.2024 23:21, Matt Zagrabelny wrote:
> 
> Are folks using the "degraded" option in /etc/fstab or the grub mount
> options for the btrfs mount?
> 
> I've read online [0] that the degraded option can cause issues due to
> timeouts being exceeded.
> 

That is incorrect. The "degraded" option does not "cause" issue due to 
timeouts which happen long before this option is even seen. It does not 
fix them, that's true.

> Also, I'm seeing some confusing results of looking at the UUID of my disks:
> 
> root@achilles:~# blkid | grep /dev/sd
> /dev/sdb2: UUID="9a46a8ad-de37-48c0-ad96-2c54df42dd5a"
> UUID_SUB="7737fc5f-036d-4126-9d7c-f1726d550444" BLOCK_SIZE="4096"
> TYPE="btrfs" PARTUUID="3a22621c-a4e1-8641-aa0f-990a824fabf4"
> /dev/sdb1: UUID="BD42-AEB1" BLOCK_SIZE="512" TYPE="vfat"
> PARTUUID="43e432b1-6c68-4b5c-9c30-793fcc10a700"
> /dev/sda2: UUID="9a46a8ad-de37-48c0-ad96-2c54df42dd5a"
> UUID_SUB="9436f570-6d15-4c74-aff8-5bd85995d92d" BLOCK_SIZE="4096"
> TYPE="btrfs" PARTUUID="e3b4b268-99e8-4043-a879-acfc8318232b"
> /dev/sda1: UUID="BD42-AEB1" BLOCK_SIZE="512" TYPE="vfat"
> PARTUUID="02568ee9-db21-4d03-a898-3d1a106ecbec"
> 
> ...why does /dev/sdb2 show up in the following /dev/disk/by-uuid, but
> not /dev/sda2:
> 
> root@achilles:~# ls -alh /dev/disk/by-uuid/
> total 0
> drwxr-xr-x 2 root root  80 Mar 25 21:16 .
> drwxr-xr-x 7 root root 140 Mar 25 21:16 ..
> lrwxrwxrwx 1 root root  10 Mar 25 21:16
> 9a46a8ad-de37-48c0-ad96-2c54df42dd5a -> ../../sdb2
> lrwxrwxrwx 1 root root  10 Mar 25 21:16 BD42-AEB1 -> ../../sda1
> 

How do you expect the one symlink to point to multiple destinations?