I have no previous experience with VirtualBox but have been trying to
use it for the last couple of weeks. Now I'm having what ought to be
a simple problem, but I'm stuck. I can't get a VBox guest to see a
connected USB flash drive.
Host: Fedora 16
Guest: Fedora 8
VirtualBox: 4.1.8 with (the only) extension
Host uses a USB keyboard and mouse which are attached normally
during boot and are visible and useable by both the host and the
guest. However, I'm usually running the guest headless. A VBox blank
USB "filter" is installed. When connecting a flash drive, the host
immediately reports detection but the guest does not see anything. These
are the only USB devices anticipated. Host /var/log/messages extract:
Feb 18 20:37:04 sunvale kernel: [ 208.186078] usb 1-5: new high-speed USB device number 4 using
ehci_hcd
Feb 18 20:37:04 sunvale kernel: [ 208.304139] usb 1-5: New USB device found, id Vendor=0dd8, id
Product=c100
Feb 18 20:37:04 sunvale kernel: [ 208.304148] usb 1-5: New USB device strings: Mfr=2, Product=1,
SerialNumber=3
Feb 18 20:37:04 sunvale kernel: [ 208.304156] usb 1-5: Product: USB Flash Disk
Feb 18 20:37:04 sunvale kernel: [ 208.304162] usb 1-5: Manufacturer: Netac
Feb 18 20:37:04 sunvale kernel: [ 208.304167] usb 1-5: SerialNumber: 4880787365A536E3
Feb 18 20:37:04 sunvale kernel: [ 208.304980] scsi5 : usb-storage 1-5:1.0
Feb 18 20:37:04 sunvale mtp-probe: checking bus 1, device 4:
"/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5"
Feb 18 20:37:04 sunvale mtp-probe: bus: 1, device: 4 was not an MTP device
Feb 18 20:37:05 sunvale kernel: [ 209.308678] scsi 5:0:0:0: Direct-Access Netac OnlyDisk
1.00 PQ: 0 ANSI: 2
Feb 18 20:37:05 sunvale kernel: [ 209.311032] sd 5:0:0:0: Attached scsi generic sg6 type 0
Feb 18 20:37:05 sunvale kernel: [ 209.649594] sd 5:0:0:0: [sdf] Assuming drive cache: write through
Feb 18 20:37:05 sunvale kernel: [ 209.649602] sd 5:0:0:0: [sdf] Attached SCSI removable disk
There are no new lines added to /var/log/messages on the guest. (Yes,
the flash drive referenced here is ancient. It is just a test device.)
Further information:
# VBoxManage list usbhost
Host USB Devices:
...
UUID: c85d93b6-59a0-43b2-a347-e4f2d52dd924
VendorId: 0x0dd8 (0DD8)
ProductId: 0xc100 (C100)
Revision: 1.0 (0100)
Manufacturer: Netac
Product: USB Flash Disk
SerialNumber: 4880787365A536E3
Address: sysfs:/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5//device:/dev/vboxusb/001/0
04
Current State: Busy
The VBox manual seems to say that USB pass-through will not work if
the USB device is actively used by the host. I presume this attachment
constitutes active use, especially since it is reported as busy, but
the drive is not mounted. (I have explicitly disabled auto-mount.) What
do I need to do to let this device (and any other USB flash drives
inserted) be seen by the guest?
Searching online finds only references to using auto-mount on the
host, then sharing the mount directory with the guest. That is not
an ideal solution in this case as software on the guest expects to
mount the drive and would need to be extensively modified. Besides,
I hate auto-mount.
The issue is the flash drive. What can't the guest see it?
--
Dave Close, Compata, Irvine CA "You can't turn shovelware into
dave@xxxxxxxxxxx, +1 714 434 7359 reliable software by patching it
dhclose@xxxxxxxxxxxxxxxxxx a whole lot." -- Marcus Ranum
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