[Solved] Real-time Linux for RPi2 Error: dd: /dev/rdisk4: Invalid argument

Navio / Edge Flight stack
1

$ sudo ./install ~/Downloads/emlid-raspberrypi2-raspbian-rt-20150401.img
Password:

. . __ . .
______ \ | | | ____ / | | | | | ___________
| ___/ | | |/ \ / /\ _ \ | | | | / __ _ __
| | | | | | | _ \ | | / __ | || |\ /| | /
|| || ||| / > || (__ ///___ >__|
/ / / /

Filesystem Size Used Avail Capacity iused ifree %iused Mounted on

  1. /dev/disk1 233Gi 141Gi 92Gi 61% 36951889 24029357 61% /
  2. devfs 355Ki 355Ki 0Bi 100% 1227 0 100% /dev
  3. map -hosts 0Bi 0Bi 0Bi 100% 0 0 100% /net
  4. map auto_home 0Bi 0Bi 0Bi 100% 0 0 100% /home
  5. /dev/disk3s1 233Gi 112Gi 121Gi 49% 0 0 100% /Volumes/My Passport
  6. /dev/disk4s2 15Gi 36Mi 14Gi 1% 9265 3796291 0% /Volumes/Untitled

Select the disk to use by enetering the disk number.
*** MAKE SURE YOU SELECT THE CORRECT DISK ***
*** Refer to the Readme if uncertain ***

Use disk [ 1, 2, 3, 4, 5, 6 ] #6
Unmounting Disk
Volume Untitled on disk4s2 unmounted
Writing image
Ctrl+T to see progress…
dd: /dev/rdisk4: Invalid argument
813+1 records in
813+0 records out
852492288 bytes transferred in 46.551256 secs (18312981 bytes/sec)

Does anyone know how to fix this issue? Image does not appear to working.

2

You don’t need to “install” the image, but to write an image to the sd card inserted in your computer using dd command (which is a raw write command) like it is described in the docs - http://docs.emlid.com/Navio-APM/configuring-raspberry-pi/

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