Partition OS drive for another OS?

Hi guys,

I'm looking at partitioning my drive to dual boot another OS.

System:    Host: cube Kernel: 4.20.1-1-MANJARO x86_64 bits: 64 compiler: gcc v: 8.2.1 Desktop: KDE Plasma 5.14.5 
           Distro: Manjaro Linux 
Machine:   Type: Desktop Mobo: GIGABYTE model: MRHM3AP serial: <filter> UEFI: American Megatrends v: F6 
           date: 08/07/2013 
CPU:       Topology: Dual Core model: Intel Core i3-3227U bits: 64 type: MT MCP arch: Ivy Bridge rev: 9 
           L2 cache: 3072 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 15169 
           Speed: 842 MHz min/max: 800/1900 MHz Core speeds (MHz): 1: 798 2: 798 3: 798 4: 798 
Graphics:  Device-1: Intel 3rd Gen Core processor Graphics vendor: Gigabyte driver: i915 v: kernel 
           bus ID: 00:02.0 
           Display: x11 server: X.Org 1.20.3 driver: intel unloaded: modesetting resolution: 2560x1440~60Hz 
           OpenGL: renderer: Mesa DRI Intel Ivybridge Mobile v: 4.2 Mesa 18.3.1 direct render: Yes 
Audio:     Device-1: Intel 7 Series/C216 Family High Definition Audio vendor: Gigabyte driver: snd_hda_intel 
           v: kernel bus ID: 00:1b.0 
           Device-2: Micronas type: USB driver: hid-generic,snd-usb-audio,usbhid bus ID: 2-1.3:6 
           Sound Server: ALSA v: k4.20.1-1-MANJARO 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Gigabyte driver: r8168 
           v: 8.045.08-NAPI port: e000 bus ID: 02:00.0 
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
           Device-2: Realtek RTL8188CE 802.11b/g/n WiFi Adapter 
           vendor: AzureWave AW-NE139H Half-size Mini PCIe Card driver: rtl8192ce v: kernel port: d000 
           bus ID: 03:00.0 
           IF: wlp3s0 state: down mac: <filter> 
Drives:    Local Storage: total: 238.48 GiB used: 148.61 GiB (62.3%) 
           ID-1: /dev/sda vendor: Crucial model: CT240M500SSD3 size: 223.57 GiB 
           ID-2: /dev/sdb type: USB model: USB DISK 2.0 size: 14.91 GiB 
Partition: ID-1: / size: 210.67 GiB used: 148.61 GiB (70.5%) fs: ext4 dev: /dev/dm-0 
Sensors:   System Temperatures: cpu: 54.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 211 Uptime: 11h 27m Memory: 3.73 GiB used: 1.35 GiB (36.3%) Init: systemd Compilers: 
           gcc: 8.2.1 Shell: bash v: 4.4.23 inxi: 3.0.28 

NAME                             FSTYPE      LABEL    UUID                                 FSAVAIL FSUSE% MOUNTPOINT
├─sda1                           vfat                 0CBD-B8C9                               299M     0% /boot/efi
├─sda2                           crypto_LUKS          ad8cb611-7c44-40a5-b670-6a6f6c2e2cb3                
│ └─luks-ad8cb611-7c44-40a5-b670-6a6f6c2e2cb3
│                                ext4                 ae9427fa-f3ac-4f25-b8a6-200734d6b1d9   51.3G    71% /
└─sda3                           crypto_LUKS          20247a76-7457-4de4-aef1-dd481864c979                
                                 swap                 d2321ad9-ab79-480e-9004-9a9b778d89dd                

Is it possible to create a new 40gb partition and maintain my current OS?

Thanks in advance.

when you post terminal output, put ```(3 backticks) above and below it to format it properly, or you can hit the </> right above the text/post box (same bar as emoji's).
im not trying to be an arse, just trying help you help yourself here. its explained better here:


Why do you think you couldn't?

Well i've tried to reduce my current partition using gparted and it wont allow me to do just that.

Did you try it from a Live media boot or from inside your installation (which is obviously impossible)?
You have LUKS+LVM setup. It may need more knowledge.
I will add some tags so someone may come and assist (I have no experience).

Maybe have a look here for general info
LVM LUKS related Tutorials

1 Like

Ininitally from inside the installation and then from a live USB of kde manjaro.

Thanks for the link, i will read through them.

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