/rw/home/user as big as /home/user

kkscr · February 24, 2024, 12:24pm

Hello,

Running ncdu to free up some space in a standalone qubes, I realised the /rw/home/user was as big as /home/user

However, it is not a simlink. The data seems to be duplicated, which double the space taken. As they are both 100G big, it would be nice to delete one

Why is this redundancy happing ?
is it safe to delete /rw/home/user ?

Thanks

renehoj · February 24, 2024, 12:26pm

/rw/home/user is the same as /home/user.

You can only save persistent in /rw, which is why it’s linked to that folder.

ls -id /home/user and ls -id /rw/home/user should show they use the same inode.

rustybird · February 24, 2024, 1:25pm

/home/user is inside of a bind mount:

github.com

QubesOS/qubes-core-agent-linux/blob/v4.2.28/filesystem/fstab#L9


      
          # Accessible filesystems, by reference, are maintained under '/dev/disk'
          # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
          #
          
          # <file system>   <mount point>     <type>  <options>            <dump> <pass>
          
          /dev/mapper/dmroot   /              ext4    defaults,discard,noatime    1 1
          /dev/xvdb            /rw            auto    noauto,defaults,discard,nosuid,nodev    1 2
          /rw/home             /home          none    noauto,bind,defaults,nosuid,nodev        0 0
          /rw/usrlocal         /usr/local     none    noauto,bind,defaults        0 0
          /dev/xvdc1           swap           swap    defaults                    0 0
          tmpfs                /dev/shm       tmpfs   defaults,size=1G            0 0
          devpts               /dev/pts       devpts  gid=5,mode=620              0 0
          sysfs                /sys           sysfs   defaults                    0 0
          proc                 /proc          proc    defaults                    0 0
          /dev/xvdi            /mnt/removable auto    noauto,user,rw              0 0

kkscr · February 24, 2024, 4:57pm

Awesome, thansk ! In did they have the same inode