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Below is how I created lvm software raid10.

Create Physical Volumes
pvcreate /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1

Create Volume Group
vgcreate my_vol_grp /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1

Create a logical volume with RAID10 from the already created volume group
lvcreate --type raid10 -m 1 -i 2 -l 100%FREE -n lvm_raid10 my_vol_grp

Create ext4 filesystem on the logical volume that you have created
mkfs.ext4 /dev/my_vol_grp/lvm_raid10

Now the question is, how do I recover and re-establish raid10 after 1 drive failure on lvm raid10 configuration. I can find a lot of information online about how to create lvm raid10. However, I can not find much information about how to recover in case the drive fails.

Also my server supports hot-swap. Thanks in advance.

fcukinyahoo
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1 Answers1

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Add the new disk to the VG. Your VG and disk names will vary. 

vgextend vg /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi-disk-1

Based on the lvmraid manual, regarding Replacing Devices, unavailable PVs call for a repair operation.

lvconvert --repair vg/lv
John Mahowald
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