Hi Fleischen,
How much of snapshot pool capacity do you have?
http://www8.hp.com/h20195/v2/GetPDF.aspx%2F4AA4-6892ENW.pdf
Refer to page 21 on snap pool space section.
http://h10032.www1.hp.com/ctg/Manual/c04220794
Also, what's the size of your snap pool? Page 201 & 206.