﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
17360	Cannot mount loop device from within shared folder on 5.2.x -> fixed in 6.0.6	thurask		"Host: Windows 10 Enterprise v1709 AMD64

Guest: Xubuntu 17.10 AMD64

On 5.2.2 r119230 and 5.2.3 r119552, attempting to mount an EXT4 partition image on the Linux guest stored in a shared folder on the Windows host fails with ""mount: can't read superblock on /dev/loop0"". 5.1.30 did not have this issue as far as I can remember.

With a new and up-to-date Xubuntu VM and Guest Additions installed:


{{{
$ cd /media/sf_SharedFolder
$ dd if=/dev/zero of=test.img bs=4k count=60000
$ sudo mkfs.ext4 test.img
$ mkdir testout
$ sudo mount -o loop test.img testout/
""mount: /media/sf_SharedFolder/testout: can't read superblock on /dev/loop0""
}}}


Doing the same thing on a folder inside the VM storage (like ~) correctly mounts the EXT4 image. The shared folder can be read from and written from within the VM as long as there's no loop mounting."	defect	closed	shared folders	VirtualBox 5.2.0	fixed	shared, folder		Linux	Windows
