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5 sats \ 15 replies \ @crowphale OP 27 Nov 2022 \ parent \ on: Bounty: resolving Qubes OS issue (inssuficient free space) bitcoin
Interesting. That seems lame that deleting VM doesn't free up the logical space.
lvdisplay shows many logical volumes, for instance, this one is associated with already deleted VM:
--- Logical volume ---
  LV Path                /dev/qubes_dom0/vm-whonix-gw-15-root.tick
  LV Name                vm-whonix-gw-15-root.tick
  VG Name                qubes_dom0
  LV UUID                o2ftaB-vIuC-FVoc-C6XS-1U24-2rJQ-2ZkENz
  LV Write Access        read only
  LV Creation host, time dom0, 2020-06-05 13:27:13 -0400
  LV Pool name           pool00
  LV Status              available
  # open                 0
  LV Size                10.00 GiB
  Mapped size            23.48%
  Current LE             2560
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:40
write
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5 sats \ 2 replies \ @crowphale OP 27 Nov 2022
Also, Is there any documentation explaining how this stuff works?
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0 sats \ 1 reply \ @Brunswick 29 Nov 2022
https://en.wikipedia.org//wiki/Logical_Volume_Manager_(Linux)
https://tldp.org/HOWTO/LVM-HOWTO/index.html
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0 sats \ 0 replies \ @Brunswick 30 Nov 2022
There is also some talk of using lvremove on the qubes documentation
https://www.qubes-os.org/doc/disk-troubleshooting/
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5 sats \ 9 replies \ @crowphale OP 27 Nov 2022
How do I free a logical volume up?
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1000 sats \ 8 replies \ @Brunswick 29 Nov 2022
Assuming that is the volume you want to remove, and the partition isn't mounted or being used by a domU, execute this command for each one that doesent belong.
lvremove /dev/qubes_dom0/vm-whonix-gw-15-root.tick
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100 sats \ 0 replies \ @crowphale7 29 Dec 2022 freebie
Thank you!
I removed 6 logical volumes (using sudo lvremove command; volumes from already deleted VMs/domains). However, sudo vgdisplay still shows 0 Free PE.
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0 sats \ 0 replies \ @crowphale OP 30 Dec 2022
I removed a couple of other VMs but the Free PE is still 0.
$ sudo vgdisplay
  --- Volume group ---
  VG Name               qubes_dom0
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  27755
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                82
  Open LV               14
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               237.47 GiB
  PE Size               4.00 MiB
  Total PE              60792
  Alloc PE / Size       60792 / 237.47 GiB
  Free  PE / Size       0 / 0   
  VG UUID               007hBk-o2Kx-OdMy-970q-g5v7-mWxc-lMi29y
In the Qubes UI (top right corner), clicking the disk icon, it shows 46.8% disk usage (it was over 50% before I removed these VMs).
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0 sats \ 5 replies \ @crowphale OP 29 Dec 2022
I used sudo lvremove to delete 6 logical volumes (from already deleted VMs), but sudo vgdisplay still says 0 Free PE. Any more ideas? I'm gonna backup my data and delete more VMs in the meantime...
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0 sats \ 4 replies \ @crowphale OP 2 Jan 2023
I removed one more large VM, now the UI says 34.4% disk usage, but vgdisplay still says 0 Free PE, so something else is going on.
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0 sats \ 3 replies \ @Brunswick 2 Jan 2023
It doesn't make any sense that you use lvremove and vgdisplay shows zero free. How are you deleting logical volumes? Do you have multiple PVs? Try pvdisplay and lvs
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0 sats \ 0 replies \ @crowphale OP 15 Jan 2023
Here is vgdisplay output again:
$ sudo vgdisplay
  --- Volume group ---
  VG Name               qubes_dom0
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  28134
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                95
  Open LV               29
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               237.47 GiB
  PE Size               4.00 MiB
  Total PE              60792
  Alloc PE / Size       60792 / 237.47 GiB
  Free  PE / Size       0 / 0   
  VG UUID               007hBk-o2Kx-OdMy-970q-g5v7-mWxc-lMi29y
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0 sats \ 0 replies \ @crowphale OP 15 Jan 2023
What is PV?
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0 sats \ 0 replies \ @crowphale OP 15 Jan 2023
sudo lvs does not show the deleted LV/VMs. UI disk usage (top right corner) shows empty disk as well (the space got released).
I deleted the LVs using the command you adviced (sudo lvremove /dev/qubes_dom0/vm-whonix-gw-15-root.tick etc).
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0 sats \ 1 reply \ @Brunswick 29 Nov 2022
xen uses partitions for its domUs, just like Linux needs partitions on your drive. When you delete a domU, you are only 'killing' the machine. LVM let's you dynamically create and delete arbitrary partitions without needing to rearrange your disk partition table. When you run the domU creation script, it creates a partition (aka volume) for you based on how large you told it to make the VM drive. When you "delete" a domU you aren't really deleting anything, only killing the process. The volume stays there, and you could mount it manually from dom0 in case there's something on there you need.
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0 sats \ 0 replies \ @crowphale OP 29 Dec 2022
I think I actually need this. One large VM (~30GB) doesn't boot (can't start terminal or anything), but before I delete it, I want to backup some stuff, so it would be great if I could mount that volume from dom0 manually, right?
$ sudo mount /dev/qubes_dom0/vm-crowphale-private-snap crow-mount
mount: wrong fs type, bad option, bad superblock on /dev/mapper/qubes_dom0-vm--crowphale--private--snap,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
Also posted https://forum.qubes-os.org/t/how-to-mount-vms-logical-volume-from-dom0/15688
Any pointers how to do this?
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