Failed to setup loop device

User Support
1

I try to install Windows 10 as a TemplateVM in Qubes 4.0.1. on a Lenovo T460 laptop with 8Gb memory.
I’m following https://github.com/Qubes-Community/Contents/blob/master/docs/os/windows/windows-vm.md guide “Windows VM installation” section. I successfully created “Win10_Template” TemplateVM, copied the “Win10_1909_English_x64.iso” file in the Home directory of “personal” AppVM, opened a dom0 terminal and typed in the command: qvm-start --cdrom=personal/Home/Win10_1909_English_x64.iso Win10_Template
I got an error: Failed to setup loop device for /Home/Win10_1909_English_x64.iso
I tried to write also with all lower case and also exactly the same way (lower and upper case) as I can see in Qube Manager but I always got the same error message.
Then I tried to “Boot qube from CDROM” in Qube Manager->Settings->Advanced but then I got “Not enought memory to start domain Win10_Template”. I even tried to increase the initial and max memory to 6Gb but got the same error.
No idea what can the problem be.

2

how large is the windows 10 iso? @ZoltanG
If the iso is too large (like 5 gb) it will failed to loop
“Not enought memory to start domain Win10_Template” is same as above or that because your laptop only got 8gb

3

Thanks for your fast reply and help!

Yes, it is 5.4 Gb so that can be the problem. (However then I don’t understand how and why the guide speaks about Windows 10? I haven’t found any Win01 .iso under 5 Gb.)

Anyway, I will try with Win7 x64, that is about 3.6 Gb.

1 Like
4

it depend on how much ram you have, 5gb iso would be a problem with 8gb computer but not for more than 12gb ram computer

Back to the day i’m still using win, i found a windows 10 iso for 4gb

you should make your windows 7 vm offline since windows 7 reached EOL for more than 2 year now

5

It should be qvm-start --cdrom=personal:/home/user/Win10…iso Win10_Template

You have tight memory don’t increase it, you should decrease it.

6

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