I am not sure whether SeaTools can recognize drives behind PERC. You can try running system diagnostics to check the health of the drives. You can refer "Running the System Diagnostics" on page 160 of below link for details on running diagnostics   [URL]   
Greetings All,I just obtained a PowerEdge R610 with a PERC 6/i controller, and have purchased 10 Dell branded 1TB drives (Seagate Constellation 2 ST91000640SS 7.2K SAS 6 Gbps) to build it out with.   I wish to test the drives to confirm that they are good before I begin building-out the RAID and installing the OS.  I see the drives when I access the Configuration Utility, but have not done anything else to the drives. Problem is, I've loaded a couple of different bootable USB tools like Seagate's "SeaTools", but the drives are never visible or acknowledged.  Forgive the noob question, but is there something else I need to do first before these tools can recognize the drives?
Want to test Seagate Drives in R610 with PERC 6/i