Character devices:
  1 mem
  4 /dev/vc/0
  4 tty
  4 ttyS
  5 /dev/tty
  5 /dev/console
  5 /dev/ptmx
  7 vcs
 10 misc
 13 input
 21 sg
 29 fb
 89 i2c
128 ptm
136 pts
180 usb
188 ttyUSB
189 usb_device
202 cpu/msr
203 cpu/cpuid
226 drm
241 usbmon
242 uio
243 pmcsas
244 gdth
245 megaraid_sas_ioctl
246 megadev_legacy
247 ql2xapidev
248 aac
249 virtio-portsdev
250 ipmidev
251 bsg
252 ptp
253 pps
254 rtc

Block devices:
  1 ramdisk
  7 loop
  8 sd
  9 md
 43 nbd
 65 sd
 66 sd
 67 sd
 68 sd
 69 sd
 70 sd
 71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
147 drbd
251 device-mapper
252 zram
253 virtblk
254 mdp
259 blkext