Comment 14 for bug 1543221

further investigation showed that small 1G disk (/dev/sdb) is connected through USB.

Device sdb udev properties:

{
   "DEVLINKS": "/dev/disk/by-id/usb-HP_iLO_LUN_00_Media_0_000002660A01-0:0 /dev/disk/by-path/pci-0000:00:14.0-usb-0:3.1:1.0-scsi-0:0:0:0",
   "DEVNAME": "/dev/sdb",
   "DEVPATH": "/devices/pci0000:00/0000:00:14.0/usb4/4-3/4-3.1/4-3.1:1.0/host1/target1:0:0/1:0:0:0/block/sdb",
   "DEVTYPE": "disk",
   "ID_BUS": "usb",
   "ID_INSTANCE": "0:0",
   "ID_MODEL": "LUN_00_Media_0",
   "ID_MODEL_ENC": "LUN\\x2000\\x20Media\\x200\\x20\\x20",
   "ID_MODEL_ID": "4030",
   "ID_PATH": "pci-0000:00:14.0-usb-0:3.1:1.0-scsi-0:0:0:0",
   "ID_PATH_TAG": "pci-0000_00_14_0-usb-0_3_1_1_0-scsi-0_0_0_0",
   "ID_REVISION": "2.09",
   "ID_SERIAL": "HP_iLO_LUN_00_Media_0_000002660A01-0:0",
   "ID_SERIAL_SHORT": "000002660A01",
   "ID_TYPE": "disk",
   "ID_USB_DRIVER": "usb-storage",
   "ID_USB_INTERFACES": ":080650:",
   "ID_USB_INTERFACE_NUM": "00",
   "ID_VENDOR": "HP_iLO",
   "ID_VENDOR_ENC": "HP\\x20iLO\\x20\\x20",
   "ID_VENDOR_ID": "0424",
   "MAJOR": "8",
   "MINOR": "16",
   "SUBSYSTEM": "block",
   "USEC_INITIALIZED": "898576"
}

I doubt it this device is really needed for further deployment procedures. It looks like nailgun-agent must filter out all USB connected block-storages with no mercy.