I'm using Linux Mint serena on an Intel NUC with an internal Samsung SSD 850 EVO M.2 250 GB hard drive.Under computer I find my file system and a drive called Samsung SSD 850 EVO M.2 250 GB. This part of the hard drive can't be accessed and as far as I can tell isn't mounted, its about 20 Gb in size.This is listed as sda3 under drives but I don't see this area listed anywhere else, can I reduce its size or even mount it?df:Filesystem     1K-blocks    Used Available  Use% Mounted onudev             8138676       0   8138676    0% /devtmpfs            1632016    9676   1622340    1% /run/dev/sda2      223315548 6559660 205389080    4% /tmpfs            8160068     808   8159260    1% /dev/shmtmpfs               5120       4      5116    1% /run/locktmpfs            8160068       0   8160068    0% /sys/fs/cgroup/dev/sda1         523248    3684    519564    1% /boot/eficgmfs                100       0       100    0% /run/cgmanager/fstmpfs            1632016      16   1632000    1% /run/user/1000mount:sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)udev on /dev type devtmpfs (rw,nosuid,relatime,size=8138676k,nr_inodes=2034669,mode=755)devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=1632016k,mode=755)/dev/sda2 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)tmpfs on /sys/fs/cgroup type tmpfs (rw,mode=755)cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids,release_agent=/run/cgmanager/agents/cgm-release-agent.pids)cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb)cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event)cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,clone_children)systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=38,pgrp=1,timeout=0,minproto=5,maxproto=5,direct)debugfs on /sys/kernel/debug type debugfs (rw,relatime)hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)mqueue on /dev/mqueue type mqueue (rw,relatime)tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)cgmfs on /run/cgmanager/fs type tmpfs (rw,relatime,size=100k,mode=755)tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=1632016k,mode=700,uid=1000,gid=1000)gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)Ok,the output of lsblk -f was:NAME   FSTYPE LABEL UUID                                 MOUNTPOINT sdasda1 vfat         C71D-C090                            /boot/efisda2 ext4         ce782317-5811-44c4-a648-a7ee8f11c483 /sda3 swap         8185f231-2fa6-4127-a5a6-147ec29f4fd7 [SWAP] Whats happens if I reduce the size  of sda3? And how would I achieve that, with the swapon command? The output of the free command:               whole       used     free          gemns.  Puffer/Cache available  Memory:    16320136      930864    14159408      203220     1229864    14859036  Outsourced memory: ------16664572-----------0----------16664572  
A part of my hard drive isn't accessible and doesn't seem to be mounted. It happens if I reduce the size of the
linux mint;partition;ssd