Re: [gentoo-user] Unable to expand ext4 partition

[Wol <antlists@youngman.org.uk>]

On 05/02/2022 17:43, Julien Roy wrote:
> Hello,
> 
> I've been running an LVM RAID 5 on my home lab for a while, and recently 
> it's been getting awfully close to 100% full, so I decided to buy a new 
> drive to add to it, however, growing an LVM RAID is more complicated 
> than I thought! I found very few documentation on how to do this, and 
> settled on following some user's notes on the Arch Wiki [0]. I should've 
> used mdadm !...
> My RAID 5 consisted of 3x6TB drives giving me a total of 12TB of usable 
> space. I am trying to grow it to 18TB now (4x6TB -1 for parity).
> I seem to have done everything in order since I can see all 4 drives are 
> used when I run the vgdisplay command, and lvdisplay tells me that there 
> is 16.37TB of usable space in the logical volume.
> In fact, running fdisk -l on the lv confirms this as well :
> Disk /dev/vgraid/lvraid: 16.37 TiB

If you'd been running mdadm I'd have been able to help ... my setup is 
ext4 over lvm over md-raid over dm-integrity over hardware...

But you've made no mention of lvgrow or whatever it's called. Not using 
lv-raid, I don't know whether you put ext straight on top of the raid, 
or do you need to grow the lv volume after you've grown the raid? I know 
I'd have to grow the volume.

Cheers,
Wol