On Thursday, May 17, 2018 at 8:57:09 PM UTC-4, Qubes Guy wrote:
> I've successfully used qvm-block (in Dom0) to attach USB drives to different
> VMs (persistently), but I've noticed that Qubes (or Linux) sometimes gives
> them to different devices over time. In other words, on Monday, my
> BIG_TOSHIBA drive will be on /dev/sda, but it'll be assigned to /dev/sdj when
> I boot up on Wednesday. This is throwing off my VeraCrypt / FreeFileSync
> backup routine. (Another way of saying this is if I say "qvm-block attach
> MyVM sys-usb:sda --persistent" when one of the three drives I use for MyVM is
> currently attached to that, this will fail if Qubes moves that drive to a
> different device-name (during boot) that isn't one of the three I previously
> attached (when I go to start up that VM).
> I thought about persistently attaching all 10 of my USB drives to the VM
> (some HDs, some flash, one SSD - I never use all of them at once - don't
> ask!) because that would certainly fix this problem, but I get the following
> error when I try to start the VM: "ERROR: Start failed: XML error: target
> 'xvdi' duplicated for disk sources '/dev/sdc' and '/dev/sde', see
> /var/log/libvirt/libxl/libxl-driver.log for details".
> Note that I did all the persistent attachment commands while the VM was not
> running. If I detach all those, start the VM, do the persistent attachments,
> shut down the VM and then restart it, I get an error along the lines of
> "qrexec process failed to respond in 60 seconds".
> So, I guess I'm asking if there's a way to just persistently attach 2 or 3
> external USB drives and have them consistently available on the same device
> names when I start the VM so VeraCrypt doesn't balk? (VeraCrypt ultimately
> doesn't care what device a drive is attached to (it could be sda - sdj on my
> system) because it shows the attached drive as "/media/user/BIG_TOSHIBA, but
> if a drive isn't where it's supposed to be, that'll fail.
> In case you're curious, the error messages in
> /var/log/libvirt/libxl/libxl-driver.log are meaningless to me, but if you
> want me to post it, I can.
> Any help you guys can give me would be greatly appreciated! Thanks...
By the way, I'm running version 4.0 of Qubes on a fairly recent laptop with 8GB
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