NottsCountyattacked from the off and when Lee Hughes turned the ball out to Ben Davies it took a timely interception from Will Antwi to concede a corner to prevent Karl Hawley reaching it.
In six minutes Stuart Thurgood won a good challenge and sent Paul Benson away with a raking pass that Benson drove just wide of the upright.
A 16th minute Danny Green corner was met by Mark Arber on the back post to find Antwi, but he lifted his effort harmlessly over the bar.
Hughes escaped down the right for County pulled it back for Davies whose cross into the middle was headed over by a well placed Hawley- the best chance of the game so far.
Hawley slipped through managed to elude an Arber tackle and go around Roberts, but Scott Griffiths got the danger away with a desperate clearance
Antwi almost a present of an opening goal to County in 29 minutes, with an under hit header back, but Roberts made a fine save at Hughes' feet and Arber cleared the ball to safety.
Hawley seemed to gain advantage of a push on Antwi and was allowed to find Hughes, but with Scott Doe getting across well, Hughes' low drive was easily dealt with by a diving Roberts.
Three minutes from half-time Notts took the lead, when Davies floated in a free-kick from the left and Hughes escaped the attention of the Daggers' defence to net with a close-in header.
County made it two in as many minutes when Scott Doe, clearly injured, only half cleared to Hughes who slipped it across goal and Hawley doubled the lead with a shot past Roberts from short range.
Benson broke away well within four minutes of the restart, fed Josh Scott, who in turn set up Peter Gain, whose goal bound shot was blocked by Thompson coming across, at the expense of a fruitless corner.
A Danny Green corner was headed across for Scott in front of goal, but his effort was also blocked and spiralled into the air for Schmeichel to palm clear.
A County third effectively finished the game in 61 minutes, when a ball in from the right saw Johnnie Jackson react first and get there just before Roberts to roll it past the keeper.
Thurgood had to make a fine saving tackle in the area on full-back Hunt to prevent him adding a
County substitute Luke Rodgers introduced for the final 10 minutes forHawley, hit a 20 yarder that brought Roberts to a fine full length save.
Daggers' two substitutes combined Nurse whipping over a fine low cross that Thomas stabbed past Schmeichel only for it to hit the inside of the post and bounce out.
At the other end the lively Rodgers cut inside Doe to bring another fine save from Roberts.
Att: 6,562 (182 D&R)