Convert from Bios to (u)efi setup

Hi everyone !
My system is 1 ssd with Manjaro (Bios)
and one hdd with ububtu (Bios) too.
The way to convert to (u)efi is to add /efi partition , disable the CSM , change BIOS boot mode to “UEFI only” , and that’s it ?
inxi -p

Partition: ID-1: / size: 36.41 GiB used: 20.11 GiB (55.2%) fs: ext4 dev: /dev/sda1
ID-2: /home size: 68.28 GiB used: 6.11 GiB (8.9%) fs: ext4 dev: /dev/sda6
ID-3: /run/timeshift/backup size: 41.58 GiB used: 28.67 GiB (69.0%) fs: ext4 dev: /dev/sdb7
[joe@joe-Manjaro ~]$ cat /proc/partitions

parted -l

Model: ATA Patriot Burst (scsi)
Disk /dev/sda: 120GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  40,0GB  40,0GB  primary   ext4            boot
 2      40,0GB  120GB   80,0GB  extended
 5      40,0GB  45,0GB  4998MB  logical   linux-swap(v1)
 6      45,0GB  120GB   75,0GB  logical   ext4

Model: ATA WDC WD5000AAVS-0 (scsi)
Disk /dev/sdb: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  24,5GB  24,5GB  primary   ext4         boot
 3      24,5GB  170GB   145GB   primary   ext4
 2      170GB   500GB   331GB   extended               lba
 7      170GB   215GB   45,6GB  logical   ext4
 5      215GB   329GB   114GB   logical   ext4
 6      329GB   500GB   171GB   logical   fat32

Thanx in advance!

No. If you have no good reason to change better stay in BIOS mode. For a clean UEFI installation your disks should be partitiioned in gpt for example.

A conversion is possible but prone to fail. If you have to ask how to do it then you probably are not experienced enough that we can recommend you to do it. :wink:


would you suggest a clean installation from the beginning?

Why do you want to switch, what are your reasons?

Very good question! We moved on to the next one! :smile:
I really thought it was better, more modern and that it has advantages over the “old” BIOS but I probably forget the saying “what works we do NOT change it”.

Exactly, don’t change something if everything is fine. I run my system in BIOS mode as well and have no reasons to change it even if I could. :grin:

I like the way you think! Thank you I will follow your advice!

Είμαι πραγματικά ευχαριστημένος!
(Happy to hear!)

Λογω κεκτημενης ταχυτητας εβαλα το Ελληνικο κειμενο αντι του google-translate !!! :rofl:
Ασχετο αλλα η google εχει κανει πολυ καλη δουλεια στην μεταφραση!!
Να σαι καλα! καλη συνεχεια απο Θεσσαλονικη μερια !!!

Due to the acquired speed I put the Greek text instead of google-translate !!! : rofl:
Irrelevant but google has done a very good job in translation !!
Be well! good continuation from Thessaloniki !!!

1 Like

what is this here

 6      329GB   500GB   171GB   logical   fat32  <-- ?

process to get GPT & /boot/efi and UEFI options good on boot is not so simple

can you report

 inxi -Fza
  Kernel: 5.10.34-1-lts x86_64 bits: 64 compiler: gcc v: 10.2.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-linux-lts 
  root=UUID=76f581c1-f4d3-4e5a-af7d-e20fb435b240 rw quiet apparmor=1 
  security=apparmor udev.log_priority=3 
  Desktop: MATE 1.24.2 info: mate-panel wm: marco 1.24.2 vt: 7 
  dm: LightDM 1.30.0 Distro: Manjaro Linux base: Arch Linux 
  Type: Desktop Mobo: ASRock model: H81M-DGS R2.0 serial: <filter> 
  BIOS: American Megatrends v: P1.60 date: 07/23/2015 
  Info: Dual Core model: Intel Core i3-4150 bits: 64 type: MT MCP 
  arch: Haswell family: 6 model-id: 3C (60) stepping: 3 microcode: 28 cache: 
  L2: 3 MiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 27992 
  Speed: 3499 MHz min/max: 800/3500 MHz Core speeds (MHz): 1: 3499 2: 3499 
  3: 3499 4: 3499 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
  Type: l1tf 
  mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: conditional, RSB filling 
  Type: srbds mitigation: Microcode 
  Type: tsx_async_abort status: Not affected 
  Device-1: Intel 4th Generation Core Processor Family Integrated Graphics 
  vendor: ASRock driver: i915 v: kernel bus-ID: 00:02.0 chip-ID: 8086:041e 
  class-ID: 0300 
  Display: x11 server: 1.20.11 compositor: marco v: 1.24.2 driver: 
  loaded: modesetting alternate: fbdev,intel,vesa 
  resolution: <missing: xdpyinfo> 
  OpenGL: renderer: Mesa DRI Intel HD Graphics 4400 (HSW GT2) 
  v: 4.5 Mesa 21.0.3 compat-v: 3.0 direct render: Yes 
  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio 
  vendor: ASRock driver: snd_hda_intel v: kernel bus-ID: 00:03.0 
  chip-ID: 8086:0c0c class-ID: 0403 
  Device-2: Intel 8 Series/C220 Series High Definition Audio vendor: ASRock 
  driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:8c20 
  class-ID: 0403 
  Sound Server-1: ALSA v: k5.10.34-1-lts running: yes 
  Sound Server-2: JACK v: 0.125.0 running: no 
  Sound Server-3: PulseAudio v: 14.2 running: yes 
  Sound Server-4: PipeWire v: 0.3.26 running: yes 
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASRock driver: r8169 v: kernel port: e000 bus-ID: 02:00.0 
  chip-ID: 10ec:8168 class-ID: 0200 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Local Storage: total: 581.33 GiB used: 54.59 GiB (9.4%) 
  SMART Message: Required tool smartctl not installed. Check --recommends 
  ID-1: /dev/sda maj-min: 8:0 vendor: Patriot model: Burst size: 111.79 GiB 
  block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s rotation: SSD 
  serial: <filter> rev: 61.3 scheme: MBR 
  ID-2: /dev/sdb maj-min: 8:16 vendor: Western Digital 
  model: WD5000AAVS-00G9B0 size: 465.76 GiB block-size: physical: 512 B 
  logical: 512 B speed: 3.0 Gb/s serial: <filter> rev: 4C05 scheme: MBR 
  ID-3: /dev/sdc maj-min: 8:32 type: USB vendor: Generic model: Flash Disk 
  size: 3.78 GiB block-size: physical: 512 B logical: 512 B rotation: SSD 
  serial: <filter> rev: 8.07 scheme: MBR 
  ID-1: / raw-size: 37.25 GiB size: 36.41 GiB (97.75%) 
  used: 19.12 GiB (52.5%) fs: ext4 dev: /dev/sda1 maj-min: 8:1 
  ID-2: /home raw-size: 69.88 GiB size: 68.28 GiB (97.71%) 
  used: 6.13 GiB (9.0%) fs: ext4 dev: /dev/sda6 maj-min: 8:6 
  Alert: No swap data was found. 
  System Temperatures: cpu: 27.5 C mobo: 31.0 C 
  Fan Speeds (RPM): fan-1: 0 fan-2: 1664 fan-3: 2468 fan-4: 0 fan-5: 0 
  Power: 12v: N/A 5v: N/A 3.3v: 3.38 vbat: 3.28 
  Processes: 193 Uptime: 40m wakeups: 0 Memory: 7.45 GiB 
  used: 2.05 GiB (27.5%) Init: systemd v: 247 tool: systemctl Compilers: 
  gcc: 10.2.0 clang: 11.1.0 Packages: 1463 pacman: 1460 lib: 438 flatpak: 0 
  snap: 3 Shell: Bash v: 5.1.4 running-in: mate-terminal inxi: 3.3.04


6      329GB   500GB   171GB   logical   fat32  <-- ?

That’s my hdd partition for data only.
I don’t remember why left fat32 formated!

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