Ubuntu Error message BLKCACHE_IOERR

[Rosssiiii]

Hello

I'm having a problem on my lubuntu 16.04 on guest.

[socratis]

Please read the following: Minimum information needed for assistance.

Don't be afraid to describe the problem in more detail. There is no 140 character limit...

[Rosssiiii]

Please read the following: Minimum information needed for assistance.

Don't be afraid to describe the problem in more detail. There is no 140 character limit...

Hello
I install virtualbox on windows 10 pro 64 bit,is the version : [Versione 5.1.22 r115126 (Qt5.6.2) ]
The guest os is lubuntu 16.04 ...64bit,on which i install guest additions,extension pack on windows 10 pro.

The os lubuntu is installed on external hdd in ext4 partition,i can also boot this like real operating system at pc start, since it has the grub.
To use on virtualbox i use this guide: https://www.howtogeek.com/187721/how-to ... irtualbox/

Now all work fine, but i'm having some problems:

1)i have this error message (http://i.imgur.com/qzUjhEp.png) every time i try to mount the red circled partition (NTFS) of this pics: (http://i.imgur.com/ZxvKWBR.png), witch is the external toshiba drive on witch there is lubuntu (lubuntu is on ext4 partition).

This is the hdd situetion : http://i.imgur.com/DWbORU4.png , the crash error there is every time i try to mount the circled partition in NTFS

How i can fix ?

2)My usb situation is: http://i.imgur.com/47ui6KF.png
i try all 3 different option but i don't know why i can't see on lubuntu (guest) my usb key 3.0 kingston datatraveler if i put on rear usb 3.0 ports on motherboard, if i use the usb 2.0 ports on front case pannel or rear it work fine and i can see on guest lubuntu.
I also select 3.0 from the virtuabox settings (http://i.imgur.com/47ui6KF.png),but don't change notting

Help pleasae

[Rosssiiii]

can someone help me ?

[frank]

The first picture you posted shows an VERR_ACCESS_DENIED error. That means that VirtualBox is not able to access this medium. Either the medium is read-only or the medium is not accessible for the current user at all. Please double-check that the user who starts the VM is able to write to the virtual disk device. If you still don't see the light, please attach the VBox.log file of such a VM session.