unrecogized partition

by dr.gj - 4/26/12 2:36 PM

new toshiba laptop WIN7- 64 SP1

the original disk utility shows 3 partitions:
1. system 1.54GB

2. "c" 595GB
3 a 15.94GB (primary) partition (no data, no

what is the 3rd for?

i am trying create a new full back up with acronis but it does not recognize the 3rd. sees only 1 & 2

is the back up useless without the 3rd?