I currently have the following setup on my server:
nvme1n1 931.5G
├─nvme1n1p1 1M
├─nvme1n1p2 vfat 256M
├─nvme1n1p3 linux_raid_member 2G
│ └─md0 ext4 2G /boot boot
└─nvme1n1p4 linux_raid_member 929.3G k005981a:1
└─md1 LVM2_member 929.1G
├─vgk005981a-swap swap 15.7G [SWAP]
└─vgk005981a-root xfs 9.1G / root
nvme0n1 931.5G
├─nvme0n1p1 1M
├─nvme0n1p2 vfat 256M
├─nvme0n1p3 linux_raid_member 2G
│ └─md0 ext4 2G /boot boot
└─nvme0n1p4 linux_raid_member 929.3G k005981a:1
└─md1 LVM2_member 929.1G
├─vgk005981a-swap swap 15.7G [SWAP]
└─vgk005981a-root xfs 9.1G / root
md0 and md1 are in RAID1, but as you can see, most of md1 is unused. I wanted to reduce its size, and mount it as a separate volume. I assume that for this, I will have to reduce the size of md1, and then I can create a new partition in nvme0n1p4 and nvme1n1p4. But how? I have tried sudo resize2fs /dev/nvme0n1p4 and sudo resize2fs /dev/md1, but both report that the drive is in use - which is true. But I can hardly umount the root. What can I do if booting from a liveCD is not an option?
