Hi, I've got a promise pegasus r6 12Tb raid with tb1 since one year now. Recently I noticed that my read speeds seem to have dropped. I now can only get around 400 mb/s read max, while before I would get around 600 mb/s. The drive is still more than half empty. I realized that in the promise utility it says the interface of my drives would be 3gb/s S-ata. But They are Seagate ST2000DM001 Barracuda 2TB SATA60 S-ata3 drives with a 6gb/s interface. Any ideas what to do about the slow speed?