Mine

# rrdtool create cpu0.rrd --step=5 --start=0 DS:user:GAUGE:5:0:100 DS:nice:GAUGE:5:0:100 DS:system:GAUGE:5:0:100 DS:interrupt:GAUGE:5:0:100 DS:idle:GAUGE:5:0:100 RRA:AVERAGE:0.5:1:34560 RRA:AVERAGE:0.5:360:672 RRA:AVERAGE:0.5:1440:600 RRA:AVERAGE:0.5:17280:600 RRA:MAX:0.5:1:34560 RRA:MAX:0.5:360:672 RRA:MAX:0.5:1440:600 RRA:MAX:0.5:17280:600 RRA:MIN:0.5:1:34560 RRA:MIN:0.5:360:672 RRA:MIN:0.5:1440:600 RRA:MIN:0.5:17280:600

 # rrdtool info  cpu0.rrd | head
filename = "cpu0.rrd"
rrd_version = "0003"
step = 5
last_update = 944503488000
ds[user].type = "GAUGE"
ds[user].minimal_heartbeat = 5
ds[user].min = 0.0000000000e+00
ds[user].max = 1.0000000000e+02
ds[user].last_ds = "UNKN"
ds[user].value = 0.0000000000e+00