Currently Being ModeratedNov 5, 2013 8:59 AM (in response to krystie lee)
The backups while in sleep mode will happen only on AC power, not battery power.
Currently Being ModeratedNov 5, 2013 5:09 PM (in response to Linc Davis)
Right. My issue is when I don't use my computer for, say, 8 hours, I come back and it only backed up once, even though it's plugged in. When I changed "Computer sleep" time to Never, it backed up all day. I guess this may be expected behavior though, since it may assume that there are no changes being made to your computer if its asleep, but I wish it didn't make that assumption.
Currently Being ModeratedNov 5, 2013 5:40 PM (in response to krystie lee)
According to the documentation, "Time Machine backups are attempted hourly until a successful backup has been completed."