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I'm aware I can use clonezilla for that, but that's not what I'm trying to do. I'm booting from an USB device. In terminal I'm doing sudo cat /dev/sdf2 > ~/file.iso, and that works. But it's creating the .iso on the USB stick.

sdf2 being the HDD I want an .iso of (which is docked in an usb3 dock). sdb being my internal archive HDD. I want the ISO to be created in another volume, which is /dev/sdb.

sudo cat /dev/sdf2 > /dev/sdb/file.iso

sudo cat /dev/sdf2 > /dev/sdb/~/file.iso

sudo cat /dev/sdf2 > /dev/sdb/x/file.iso

Nothing works, always "no directory".

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  • Do you want an iso file or image file on the other device, or do you want to make the other device (/dev/sdb) a USB boot drive? Please notice that an image of a partition, which you describe in your question is not an iso file in the meaning, that it can be cloned to make a bootable CD/DVD/USB drive. An iso file needs a bootloader too, and for it to work from a USB drive also a partition structure.
    – sudodus
    Apr 17 '18 at 5:44
  • The sdf2 is my old system hdd (win 7). I just want a complete image from it, so I can browse in my new system and check what apps, etc. I had installed. The sdf2 is mounted via an usb dock. The sdb is my other internal archive hdd. Apr 17 '18 at 6:14
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Your commands are not working because you are trying to create a file or folder in a block-device. A block-device is a special file, you cannot create a file or folder in it, it's not a directory. /dev/sdb is a block-device:

~$ ls -l /dev/sdb
brw-rw---- 1 root disk 8, 16 Aug  8 10:11 /dev/sdb

Look at the first letter of the permissions, it's b for block-device, not d for directory.

If you would run sudo cat /dev/sdf2 > /dev/sdb, that would work, but would relentless destroy any file-system that's already stored on that drive, you don't want to do that.

Instead, when booted into the live system, mount the partition where you want to store the output-file:

sudo mount /dev/sdbx /mnt

and then use

sudo cat /dev/sdf2 > /mnt/path/to/folder/filename/of/your/choice
0

... I believe what you are looking for is in the manuals for another partition with a copy of sdf2 in, lets say, sdf4 maybe?

sudo fdisk -l

... see what you have available first. Gparted - partition create and resizing, mkfs.vfat /dev/sdf4 (-I if needed ) and ... now try it ^__^

... the problem creates its own errors with anything newer than Windows 3.10 and those Security WIN32 files - these argue strongly on Windows 95 and newer. This should let you play with sdf2 to your hearts content. ( just a thought )

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