oceanBT's questions

Is there an auto-dismount in veracrypt or should I always unmount veracrypt volumes manually before shutting down to prevent a broken filesystem/container?

I found the answer for Windows in the veracrypt FAQ, but not for Linux / Ubuntu.

How can I list all enabled services from systemctl?

I know running systemctl command by itself lists all services, but I would like to only get the enabled ones.

i don't understand where the second data "container" comes from:

ocean@nas:/mnt$ sudo btrfs filesystem df /
Data, RAID1: total=3.00GiB, used=1.70GiB
Data, single: total=1.00GiB, used=0.00B  <-- this one
System, RAID1: total=32.00MiB, used=16.00KiB
Metadata, RAID1: total=1.00GiB, used=73.86MiB
GlobalReserve, single: total=32.00MiB, used=0.00B

how can i find out where this comes from?

It suddenly appeared after balancing my drives:

• new linux on btrfs filesystem, with two unbalanced hdds:

  ocean@nas:/mnt$ sudo btrfs filesystem df /
  Data, single: total=2.01GiB, used=1.70GiB
  System, DUP: total=8.00MiB, used=16.00KiB
  Metadata, DUP: total=1.00GiB, used=72.38MiB
  GlobalReserve, single: total=32.00MiB, used=0.00B
  

• then i balanced the btrfs:

  ocean@nas:/mnt$ sudo btrfs balance start -dconvert=raid1 -mconvert=raid1 /
  Done, had to relocate 5 out of 5 chunks
  

• output after balacing:

     ocean@nas:/mnt$ sudo btrfs filesystem show
     Label: 'hddArray1'  uuid: 925b7c82-f7da-4eda-89ce-990cc63f53ad
     Total devices 2 FS bytes used 1.77GiB
     devid    1 size 3.63TiB used 4.03GiB path /dev/sda3
     devid    2 size 3.64TiB used 5.03GiB path /dev/sdb
  

• and (as above):

    ocean@nas:/mnt$ sudo btrfs filesystem df /
    Data, RAID1: total=3.00GiB, used=1.70GiB
    Data, single: total=1.00GiB, used=0.00B  <-- this one
    System, RAID1: total=32.00MiB, used=16.00KiB
    Metadata, RAID1: total=1.00GiB, used=73.86MiB
    GlobalReserve, single: total=32.00MiB, used=0.00B
  

• and:

   ocean@nas:/mnt$ sudo btrfs device usage -g /
   /dev/sda3, ID: 1
     Device size:          3717.55GiB
     Data,RAID1:              3.00GiB
     Metadata,RAID1:          1.00GiB
     System,RAID1:            0.03GiB
     Unallocated:          3713.52GiB
  
   /dev/sdb, ID: 2
      Device size:          3726.02GiB
      Data,single:             1.00GiB
      Data,RAID1:              3.00GiB
      Metadata,RAID1:          1.00GiB
      System,RAID1:            0.03GiB
      Unallocated:          3720.99GiB
  

Thanks!

When I add a device to a btrfs sub-volume with

btrfs device add /dev/sdb /path/to/subvolume

is the added device then only used for the sub-volume or is it used by the whole file-system ?

Or the question in the other way: Is it possible to add a device only to a sub-volume?

thanks!