I had to gracefully shutdown b-2008-ix-0170 because it was burning jobs for the release. The first failure: http://buildbot-master86.bb.releng.scl3.mozilla.com:8001/builders/b2g_mozilla-b2g34_v2_1s_win32_gecko%20build/builds/1/steps/clone_buildtools/logs/stdio
There's probably something we can dupe this against already, or it goes away when we have fully switched to runner. In this case there was a 'WINNT 6.1 x86-64 cypress build' job which ran out of space while packaging tests. It asked for 12G and got 12.4G. Probably just need to ask for more.
This happened again for today's beta release.
This time the marionette job failed when the previous automation job didn't. The ui_update_verify jobs don't seem to be making sure there is sufficient free space.
Assuming that moving to AWS has fixed this. Re-open if that's not true.