crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Try this: configuring System Preferences->Energy Saver for  Power Adapter to "Put the hard disk(s) to sleep when possible".  Now see if the problem still happens.

crwdns2915684:0crwdne2915684:0:

open