Comments on How To Resize LVM Software RAID1 Partitions (Shrink & Grow)
How To Resize LVM Software RAID1 Partitions (Shrink & Grow) This article describes how you can shrink and grow existing software RAID1 partitions with LVM on top. I have tested this with logical volumes that use ext3 as the file system. I will describe this procedure for an intact RAID array and also a degraded RAID array.
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Comments
Fine article ! Thanks for it.
Maybe you should precise that you use Live CD Knoppix as a rescue system.
I was able to use this to extent the RAID0 LVM as well. Thanks
You discussed how to shring and grow an mdadm managed software RAID array. The article suggests that this was discussing LVM RAID 1 arrays which use the md devices behind the scenes and do not require mdadm at all. Consider changing the title name.
In my use case, beyond what's written in the article, I also shunk the partition that the mdadm RAID was running on. In such situation, I had to run
partprobeafter partition size changes, and
mdadm --assemble --update=devicesize /dev/md1such that mdadm would reassemble the RAID (this is also explained on e.g. https://www.redhat.com/en/blog/expanding-capacity-red-hat-enterprise-linux-md-raid-part-1).