Overall, it sounds like your hard disk may be running out of space while running these commands. Make sure you have adequate hard disk space, particularly in your tmp directory.
Can you provide some details about the disks, partitioning, and where you mapped tmp to?
For your dada2 error, see the topics here for some instructions for diagnosing and debugging:
If none of that helps, please provide the system information requested of others in those topic threads.
Sounds like a partition on your hard disk is running out of space.