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tune2fs -m 0 /dev/zarizeni

TUNE2FS(8)                                                          TUNE2FS(8)

NAME
       tune2fs  -  adjust  tunable  filesystem  parameters  on  ext2/ext3/ext4
       filesystems

SYNOPSIS
       tune2fs [ -l ] [ -c max-mount-counts ] [ -e errors-behavior ] [ -f ]  [
       -i  interval-between-checks  ]  [  -j  ]  [  -J  journal-options ] [ -m
       reserved-blocks-percentage  ]  [  -o  [^]mount-options[,...]   ]  [  -r
       reserved-blocks-count ] [ -s sparse-super-flag ] [ -u user ] [ -g group
       ] [ -C mount-count ] [ -E extended-options ] [ -L volume-name  ]  [  -M
       last-mounted-directory  ] [ -O [^]feature[,...]  ] [ -Q quota-options ]
       [ -T time-last-checked ] [ -U UUID ] device

DESCRIPTION
       tune2fs allows the  system  administrator  to  adjust  various  tunable
       filesystem  parameters  on  Linux ext2, ext3, or ext4 filesystems.  The
       current values of these options can be displayed by using the -l option
       to tune2fs(8) program, or by using the dumpe2fs(8) program.

       The  device  specifier can either be a filename (i.e., /dev/sda1), or a
       LABEL or UUID specifier: "LABEL=volume-name"  or  "UUID=uuid".   (i.e.,
       LABEL=home or UUID=e40486c6-84d5-4f2f-b99c-032281799c9d).

OPTIONS
       -m reserved-blocks-percentage
              Set the percentage of the filesystem which may only be allocated
              by  privileged  processes.   Reserving some number of filesystem
              blocks for use by privileged processes is done to avoid filesys‐
              tem  fragmentation,  and  to  allow system daemons, such as sys‐
              logd(8), to continue to function correctly after  non-privileged
              processes  are  prevented  from writing to the filesystem.  Nor‐
              mally, the default percentage of reserved blocks is 5%.

       -r reserved-blocks-count
              Set the number of reserved filesystem blocks.