I plugged in this usb stick. There is no /dev/sda1 or /dev/sda2 created. *** ubuntu-lxde-14.03.06-p16g1.img used ***
udevadm monitor messages:-
KERNEL[88198.016745] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1 (usb)
KERNEL[88198.020210] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
KERNEL[88198.020394] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1 (scsi)
KERNEL[88198.021168] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/scsi_host/host1 (scsi_host)
UDEV [88198.062786] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1 (usb)
UDEV [88198.078563] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
UDEV [88198.089678] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1 (scsi)
UDEV [88198.102469] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/scsi_host/host1 (scsi_host)
KERNEL[88199.047758] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0 (scsi)
KERNEL[88199.050375] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0 (scsi)
KERNEL[88199.052532] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_disk/1:0:0:0 (scsi_disk)
KERNEL[88199.054577] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_device/1:0:0:0 (scsi_device)
KERNEL[88199.056863] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_generic/sg0 (scsi_generic)
UDEV [88199.064825] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0 (scsi)
UDEV [88199.077912] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0 (scsi)
UDEV [88199.117502] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_generic/sg0 (scsi_generic)
UDEV [88199.119788] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_device/1:0:0:0 (scsi_device)
UDEV [88199.126957] add /devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0/scsi_disk/1:0:0:0 (scsi_disk)
KERNEL[88200.072818] add /devices/virtual/bdi/8:0 (bdi)
UDEV [88200.078218] add /devices/virtual/bdi/8:0 (bdi)
KERNEL[88200.112593] add /block/sda (block)
KERNEL[88200.117753] add /block/sda/sda1 (block)
KERNEL[88200.117938] add /block/sda/sda2 (block)
UDEV [88200.143944] add /block/sda (block)
UDEV [88200.165362] add /block/sda/sda2 (block)
UDEV [88200.172236] add /block/sda/sda1 (block)
Everything looks OK below and in the sda1 and sda2 directories:-
root@parallella-16:/opt/linrad-04.00# ls -l /sys/block/sda/
total 0
-r--r--r-- 1 root root 4096 May 17 22:02 alignment_offset
lrwxrwxrwx 1 root root 0 May 17 22:02 bdi -> ../../devices/virtual/bdi/8:0
-r--r--r-- 1 root root 4096 May 17 22:02 capability
-r--r--r-- 1 root root 4096 May 17 22:02 dev
lrwxrwxrwx 1 root root 0 May 17 22:02 device -> ../../devices/amba.1/e0002000.usb/xusbps-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0/host1/target1:0:0/1:0:0:0
-r--r--r-- 1 root root 4096 May 17 22:02 discard_alignment
-r--r--r-- 1 root root 4096 May 17 22:02 events
-r--r--r-- 1 root root 4096 May 17 22:02 events_async
-rw-r--r-- 1 root root 4096 May 17 22:02 events_poll_msecs
-r--r--r-- 1 root root 4096 May 17 22:02 ext_range
drwxr-xr-x 2 root root 0 May 17 22:02 holders
-r--r--r-- 1 root root 4096 May 17 22:02 inflight
drwxr-xr-x 2 root root 0 May 17 22:02 power
drwxr-xr-x 3 root root 0 May 17 22:02 queue
-r--r--r-- 1 root root 4096 May 17 22:02 range
-r--r--r-- 1 root root 4096 May 17 22:01 removable
-r--r--r-- 1 root root 4096 May 17 22:01 ro
drwxr-xr-x 4 root root 0 May 17 22:01 sda1
drwxr-xr-x 4 root root 0 May 17 22:01 sda2
-r--r--r-- 1 root root 4096 May 17 22:02 size
drwxr-xr-x 2 root root 0 May 17 22:02 slaves
-r--r--r-- 1 root root 4096 May 17 22:02 stat
lrwxrwxrwx 1 root root 0 May 17 22:01 subsystem -> ../../block
-rw-r--r-- 1 root root 4096 May 17 22:01 uevent