A good day in the office for Ferrari IMO. At the end of day one at Barcelona, the F138 notched up the most laps, 110 with some really good reliability. Whatever overheating problem they had with Pedro was under control today.
The team focused on long runs, at Pat Fry said they would in an interview beforehand.
I heard early on that the team were running the engine for longer than normal periods in the pits. I feel that perhaps we have something going on in the engine dept. Time will tell.
Best news isn't the times below, although they are respectable. A few reports I've read seem to indicated that the F138 looks very good and stable on the track - that is really good to read. Here are the times and laps for anyone interested, with some additional information below:-

Rosberg fastest time was set on the mediums I believe and was the second of an 8 lap run.
Kimi's time was set on the 3rd lap of a 4 lap run, and like Rosberg was on mediums.
Nando's time (.3 off the Merc) was set on lap 2 of an 11 lap run on mediums.
Seb's time (a whisker off Nando's) was set on the 2nd lap of a 7 lap run on mediums.