Si desea detectar cómo se está cargando un dispositivo USB, con excelente granularidad, aquí hay (2) formas:
udevadm monitor
: Esto le mostrará el dispositivo USB que se está cargando como lo ve el bus USB .
udevadm
es parte del paquete predeterminado udev
en 18.04 LTS; No hay necesidad de instalarlo.
Sin embargo, ejecute udevadm monitor
ANTES de insertar el dispositivo USB.
Salida de muestra cargando una unidad flash USB como se muestra a continuación. Salte a la última línea e incluso puede ver qué dispositivo cargó como ( sda1 ):
udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[969.010067] add /devices/pci0000:00/0000:00:14.0/usb1/1-1 (usb)
KERNEL[969.010367] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0 (usb)
KERNEL[969.018769] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0 (scsi)
KERNEL[969.018849] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/scsi_host/host0 (scsi_host)
KERNEL[969.018934] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0 (usb)
KERNEL[969.019049] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1 (usb)
UDEV [969.024995] add /devices/pci0000:00/0000:00:14.0/usb1/1-1 (usb)
UDEV [969.031390] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0 (usb)
UDEV [969.036362] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0 (scsi)
UDEV [969.041258] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/scsi_host/host0 (scsi_host)
UDEV [969.046202] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0 (usb)
UDEV [969.051734] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1 (usb)
KERNEL[970.051706] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0 (scsi)
KERNEL[970.052068] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0 (scsi)
KERNEL[970.052215] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_disk/0:0:0:0 (scsi_disk)
KERNEL[970.052435] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0 (scsi)
KERNEL[970.052585] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_device/0:0:0:0 (scsi_device)
KERNEL[970.052774] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_generic/sg0 (scsi_generic)
KERNEL[970.052963] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/bsg/0:0:0:0 (bsg)
UDEV [970.060833] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0 (scsi)
KERNEL[970.061634] add /devices/virtual/bdi/8:0 (bdi)
UDEV [970.069006] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0 (scsi)
UDEV [970.071467] add /devices/virtual/bdi/8:0 (bdi)
UDEV [970.075852] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_disk/0:0:0:0 (scsi_disk)
KERNEL[970.079839] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda (block)
KERNEL[970.079989] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda/sda1 (block)
UDEV [970.083556] bind /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0 (scsi)
UDEV [970.091288] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_device/0:0:0:0 (scsi_device)
UDEV [970.091755] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_generic/sg0 (scsi_generic)
UDEV [970.106807] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/bsg/0:0:0:0 (bsg)
UDEV [970.339976] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda (block)
UDEV [970.519549] add /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda/sda1 (block)
.
dmesg
(que imprime el búfer de anillo Kernel) también le dará una visibilidad granular de la carga de su dispositivo USB.
Sin embargo, dmesg
en contraste, le udevadm monitor
muestra cómo cargar su dispositivo USB externo desde la perspectiva del Kernel
Salida de muestra de dmesg
-esta vez desde una unidad de CD externa USB- como se muestra a continuación. El " 1-2 " se refiere a su ubicación en el bus USB: primer bus, segundo puerto. Si hubiera conectado la unidad de CD al otro puerto, habría informado " 1-1 ":
[ 55.296482] usb 1-2: new high-speed USB device number 4 using xhci_hcd
[ 55.453715] usb 1-2: New USB device found, idVendor=1c6b, idProduct=a222
[ 55.453730] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 55.453740] usb 1-2: Product: Mass Storage Device
[ 55.453749] usb 1-2: Manufacturer: USB2.0 External
[ 55.453758] usb 1-2: SerialNumber: 2010100500000000174
[ 55.525860] usb-storage 1-2:1.0: USB Mass Storage device detected
[ 55.527273] scsi host0: usb-storage 1-2:1.0
[ 55.530031] usbcore: registered new interface driver usb-storage
[ 55.545215] usbcore: registered new interface driver uas
[ 56.553073] scsi 0:0:0:0: CD-ROM slimtype eTDU108 1 SL46 PQ: 0 ANSI: 0