how to write a iso to a flash-drive correctly - the steps to go!?

[dhubs]

dear Michael, dear DemandingTruth


first of all -- many thanks for the support and for your replies. I am glad - i am really glad to be part of your forum.

well i want to create a iso on a usb-stick that is on

a. sdb or
b. sdb1

the question is - how to name it in the dd-command?! see more here..

Ger?t      Boot Anfang     Ende Sektoren Gr??e Kn Typ
/dev/sdb1  *        64 60620799 60620736 28,9G  c W95 FAT32 (LBA)
ubuntu@T420s:~$ lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0             7:0    0     4K  1 loop /snap/bare/5
loop1             7:1    0  55,4M  1 loop /snap/core18/2846
loop2             7:2    0  55,4M  1 loop /snap/core18/2855
loop3             7:3    0  63,7M  1 loop /snap/core20/2496
loop4             7:4    0  63,7M  1 loop /snap/core20/2434
loop5             7:5    0  73,9M  1 loop /snap/core22/1748
loop6             7:6    0  73,9M  1 loop /snap/core22/1722
loop7             7:7    0  93,6M  1 loop /snap/featherpad/1070
loop8             7:8    0 257,9M  1 loop /snap/firefox/5783
loop9             7:9    0 349,7M  1 loop /snap/gnome-3-38-2004/143
loop10            7:10   0 257,8M  1 loop /snap/firefox/5836
loop11            7:11   0 505,1M  1 loop /snap/gnome-42-2204/176
loop12            7:12   0   516M  1 loop /snap/gnome-42-2204/202
loop13            7:13   0  91,7M  1 loop /snap/gtk-common-themes/1535
loop14            7:14   0 752,9M  1 loop /snap/pycharm-community/439
loop15            7:15   0 822,3M  1 loop /snap/pycharm-community/457
loop16            7:16   0  12,9M  1 loop /snap/snap-store/1113
loop17            7:17   0  12,2M  1 loop /snap/snap-store/1216
loop18            7:18   0  44,4M  1 loop /snap/snapd/23545
loop19            7:19   0   568K  1 loop /snap/snapd-desktop-integration/253
loop20            7:20   0 321,1M  1 loop /snap/vlc/3721
loop21            7:21   0   500K  1 loop /snap/snapd-desktop-integration/178
loop22            7:22   0  44,4M  1 loop /snap/snapd/23771
loop23            7:23   0 116,8M  1 loop /snap/zotero-snap/104
loop24            7:24   0 321,1M  1 loop /snap/vlc/3777
loop25            7:25   0 116,7M  1 loop /snap/zotero-snap/98
sda               8:0    0 119,2G  0 disk 
├─sda1            8:1    0     1G  0 part /boot/efi
├─sda2            8:2    0     2G  0 part /boot
└─sda3            8:3    0 116,2G  0 part 
  └─ubuntu--vg-ubuntu--lv
                253:0    0 116,2G  0 lvm  /var/snap/firefox/common/host-hunspell
                                          /
sdb               8:16   1  28,9G  0 disk 
└─sdb1            8:17   1  28,9G  0 part /media/ubuntu/71BE-0530
sr0              11:0    1  1024M  0 rom

well if iwant to write a iso to the usb-stick should i do it like so:

ubuntu@T420s:~$ sudo dd bs=4M if=~/Videos/eos2.iso of=/dev/sdb status=progress oflag=sync

well the question is: should i name the target sdb or sdb1 ?

subsequently : is this a good command

ubuntu@T420s:~$ sudo dd bs=4M if=~/Videos/eos2.iso of=/dev/sdb status=progress oflag=sync

for creating the iso on a usb?

well the question is should i use sdb when, it looks like, i should be using sdb1.

in other words should i try this:

sudo rsync -av --progress /home/ubuntu/Dokumente/ /media/ubuntu/sdb1

or

ubuntu@T420s:~$ sudo dd bs=4M if=~/Videos/eos2.iso of=/dev/sdb1 status=progress oflag=sync

dear Michael, dear Demanding Truth,

i look forward to hear from you

gretings

update:


if we have with

lsblk

sda               8:0    0 119,2G  0 disk 
├─sda1            8:1    0     1G  0 part /boot/efi
├─sda2            8:2    0     2G  0 part /boot
└─sda3            8:3    0 116,2G  0 part 
  └─ubuntu--vg-ubuntu--lv
                253:0    0 116,2G  0 lvm  /var/snap/firefox/common/host-hunspell
                                          /
sdb               8:16   1  28,9G  0 disk 
└─sdb1            8:17   1  28,9G  0 part /media/ubuntu/71BE-0530
sr0              11:0    1  1024M  0 rom

my command could be so

sudo dd bs=4M if=/Videos/eos2.iso of=/dev/sdb1 status=progress oflag=sync

which leads to

                                                    /
sdb                         8:16   1  28,9G  0 disk 
└─sdb1                      8:17   1  28,9G  0 part /media/ubuntu/EOS_202502
sr0                        11:0    1  1024M  0 rom  
ubuntu@T420s:~$

regarding the sdb and the sdb1

but i guess that if i use sdb it will overwrite the device; ie. the input & all data (inc. metadata) will be written to the new device; so if the source [ISO] was bootable; the sdb device will also be bootable. If we write to a partition (sdb1) then we 'll have a copy there; but any metadata won't exist & even if source was bootable (metadata is hidden inside partition); the copy on sdb1 will NOT be bootable unless we create/have boot code that will perform those functions. conclusio: well i think that both commands would be probably correct ( bunt in some ways just different!); well finally - it'll depend what we trying to achieve as to which will suit our needs

i now will do some tests - what fits best as a iso stick...



have a nice evening.