Re: Removing LVM

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On Mon, 2019-12-02 at 21:05 +0800, Ed Greshko wrote:
> > How can I blow away LVM on the cloned drive without having to start
> > again from scratch?
> >
> 
> Are you looking for commands like lvremove and pvremove?

I'd already looked at those.

lvremove takes an LV identifier as argument, but since the cloned
partition has the same id as the original, and the original is still in
use on the active system, it won't let me remove it:

   $ sudo lvremove -t -f fedora_localhost-live/swap
     TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated.
     /dev/sde: open failed: No medium found <------------------ I don't know what this is -------------
     WARNING: Not using device /dev/sdc3 for PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS.
     WARNING: PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS prefers device /dev/sda3 because device is used by LV.
     Logical volume fedora_localhost-live/swap in use.


pvremove gives the same error as before:

$ sudo pvremove /dev/sdc3
  /dev/sde: open failed: No medium found
  WARNING: Not using device /dev/sdc3 for PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS.
  WARNING: PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS prefers device /dev/sda3 because device is used by LV.
  Device /dev/sdc3 excluded by a filter.

I don't know why it's complaining about /dev/sde. There is no such
device on my system:

   $ lsblk -f
   NAME                            FSTYPE      LABEL    UUID                                   FSAVAIL FSUSE% MOUNTPOINT
   sda                                                                                                        
   ├─sda1                          vfat                 13EE-9841                               579.2M     3% /boot/efi
   ├─sda2                          ext4                 39fbc534-68c2-421b-9bcd-96fd22320f37    676.5M    24% /boot
   └─sda3                          LVM2_member          VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS                
     ├─fedora_localhost--live-swap swap                 6c16e7ba-a483-4832-ab9b-a32af7f46d62                  [SWAP]
     ├─fedora_localhost--live-home ext4                 929f2710-cb9e-44d4-bdd8-52f733a408e6                  
     └─fedora_localhost--live-root ext4                 d38245ca-2e6d-491f-991b-c93cb76ce1af     35.7G    42% /
   sdb                                                                                                        
   └─sdb1                          btrfs       home     6496d6da-6b7a-4cdd-9bb8-767c08d1c84e    364.2G    80% /home
   sdc                                                                                                        
   ├─sdc1                          vfat                 71DB-ECF6                                             
   ├─sdc2                          ext4                 b35d090b-0072-491b-8664-5c18aa16dd4d    676.5M    24% /home/poc/SDC2
   ├─sdc3                          LVM2_member          VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS                
   ├─sdc4                          swap        swap     4712b7bc-be30-467b-a5c5-67dcb8c9eb53                  
   └─sdc5                          ext4        home     c1df25d9-4c89-43a5-886d-3bbbf8513b22      679G    55% /Wim
   sdd                                                                                                        
   ├─sdd1                          ntfs        Recovery DEC47E01C47DDBE9                                      
   ├─sdd2                          vfat                 6881-A320                                             
   ├─sdd3                                                                                                     
   ├─sdd4                          ntfs                 2224823A248210C9                                      
   └─sdd5                          ntfs                 1C36E53036E50B98                                      

/dev/sda is the original (source) disk and /dev/sdc the new (cloned)
disk. Some partition UUIDs on /dev/sdc have been changed using gparted,
but it refuses to touch /dev/sdc3 which thus has the same UUID as the
original /dev/sda3. Ignore the temporary mount points for these.

For completeness, here are the current LV and PV listings:

   $ sudo lvdisplay 
     /dev/sde: open failed: No medium found
     WARNING: Not using device /dev/sdc3 for PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS.
     WARNING: PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS prefers device /dev/sda3 because device is used by LV.
     --- Logical volume ---
     LV Path                /dev/fedora_localhost-live/swap
     LV Name                swap
     VG Name                fedora_localhost-live
     LV UUID                fTxmLI-LtUa-zBff-Ozyv-GiEY-XKhJ-nLTLFY
     LV Write Access        read/write
     LV Creation host, time localhost-live, 2019-11-07 18:23:56 +0000
     LV Status              available
     # open                 2
     LV Size                7.72 GiB
     Current LE             1977
     Segments               1
     Allocation             inherit
     Read ahead sectors     auto
     - currently set to     256
     Block device           253:0
      
     --- Logical volume ---
     LV Path                /dev/fedora_localhost-live/home
     LV Name                home
     VG Name                fedora_localhost-live
     LV UUID                20haaX-QwiB-aCN1-acvW-WAZT-JSbP-RoaiVF
     LV Write Access        read/write
     LV Creation host, time localhost-live, 2019-11-07 18:23:57 +0000
     LV Status              available
     # open                 0
     LV Size                <33.62 GiB
     Current LE             8606
     Segments               1
     Allocation             inherit
     Read ahead sectors     auto
     - currently set to     256
     Block device           253:1
      
     --- Logical volume ---
     LV Path                /dev/fedora_localhost-live/root
     LV Name                root
     VG Name                fedora_localhost-live
     LV UUID                7i9QWE-pyJj-MbGC-pAP8-AQsK-Cb6H-1u5LOi
     LV Write Access        read/write
     LV Creation host, time localhost-live, 2019-11-07 18:23:57 +0000
     LV Status              available
     # open                 1
     LV Size                <68.86 GiB
     Current LE             17628
     Segments               1
     Allocation             inherit
     Read ahead sectors     auto
     - currently set to     256
     Block device           253:2
      
   [poc@Bree ~]$ sudo pvdisplay  
     /dev/sde: open failed: No medium found
     WARNING: Not using device /dev/sdc3 for PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS.
     WARNING: PV VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS prefers device /dev/sda3 because device is used by LV.
     --- Physical volume ---
     PV Name               /dev/sda3
     VG Name               fedora_localhost-live
     PV Size               110.20 GiB / not usable 4.00 MiB
     Allocatable           yes (but full)
     PE Size               4.00 MiB
     Total PE              28211
     Free PE               0
     Allocated PE          28211
     PV UUID               VKT04D-m4CK-6n7L-vSMI-vohC-W8bt-zPVCxS

poc
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