When installing QuickBox, you might of noticed that your disk space that is available for your media, applications and more is lower than expected.
This is because with any Linux installation, it reserves roughly 5% of your disk space to prevent your disk space getting to 100% (known as Filesystem Reserved Space). This is both a security measure and a Disk Drive Health measure. The filesystem reserved blocks also serve to provide the system with free blocks with which to defragment the filesystem. Clearly, this isn’t something you’d want to do on a filesystem utilizing QuickBox Pro, as it contains a database, or in most circumstances with a seeebox doing a large number of writes and deletions.
Unfortunately, due to this restriction, QuickBox is unable to override this functionality and is unable to give you that disk space back.
Since QuickBox will not automatically reduce this percentage, we are not above the means to provide you a solution to adjusting this.
We would advise reducing to no less than 2%, just to ensure you have some room for the necessary defragmentation of the filesystem as well as space to ensure 100% disk fill up is avoided.
Check your disk with running df -h:
# df -h Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 3.8G 0 3.8G 0% /dev tmpfs tmpfs 780M 79M 702M 11% /run /dev/mapper/reaper--vg-root ext4 30G 8.5G 20G 30% / tmpfs tmpfs 3.9G 22M 3.8G 1% /dev/shm tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 ext2 720M 157M 527M 23% /boot tmpfs tmpfs 780M 8.0K 780M 1% /run/user/1000 tmpfs tmpfs 780M 0 780M 0% /run/user/0
In a Linux environment, tune2fs is an indispensable tool, used to tune parameters on ext2/ext3/ext4 filesystems. From the output above we can see that we can modify the ext4 types, respectively /dev/mapper/reaper--vg-root and /dev/sda1.
tune2fs -m 1 /dev/mapper/reaper--vg-root tune2fs 1.42.13 (17-May-2015) Setting reserved blocks percentage to 1% (79493 blocks)
From the above output, we used -m 1 to reduce our reserved blocks percentage to 1%. Let’s take a look at df -h now.
# df -h Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 3.8G 0 3.8G 0% /dev tmpfs tmpfs 780M 79M 702M 11% /run /dev/mapper/reaper--vg-root ext4 30G 8.5G 21G 29% / tmpfs tmpfs 3.9G 22M 3.8G 1% /dev/shm tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 ext2 720M 157M 556M 22% /boot tmpfs tmpfs 780M 8.0K 780M 1% /run/user/1000 tmpfs tmpfs 780M 0 780M 0% /run/user/0
As you can see, we have reduced our used space from 30% to 29%. Of course, this is simply a small Proxmox test VM, but this shows how simple it can be to remove/reduce the limits that Linux places by a default. This is especially handy for servers utilizing TB worth of space.
