I have a lot of storage space on my Linux desktop box at home. The bulk of it is spread across two mdadm software RAID 5 partitions: one 3-disk array and one 5-disk array. Occasionally, I've found that the 5-disk array comes up in degraded mode after the machine boots. After much frustration, I think I finally found the fix for this.
My kids' Nexus 5 phone and Nexus 7 (2012) tablets have a terrible time staying connected to our Netgear N300 (WNR3500L) WiFi router. I used to think that it was just my son's imagination, because he would complain of problems while I was actively using my Samsung Galaxy Note 2 just fine on the same access point. It turns out the problem is due to the Nexus WiFi radio not playing nice with many Netgear routers. The fix, fortunately, is a simple one.