Thanks for getting back to me so quickly Z440Roger
I'm trying to locate the SAS ports in the BIOS to disable them as suggested, would you happen to know the location. Also have you download and used the HP Performance Advisor - I was looking to see if I could disable it from there.
The original setup i had was 2 X SSD cards and 4 Seagates all connected through an LSI MegaRaid SAS 9270-8i card which I've removed. The 2 X SSD cards had been configured for RAID 1 and 4 HD's as RAID 5, I've now rebuilt my whole machine and kept the 2 X SSD cards as separate connected to SATA 3.0 with 1 configured with my OS, the other is basically for storage. Regarding the 4 Seagates I've disconnected them for now.
I need to make some drastic changes to performance to this machine, I need to improve on boot up, USB data extraction and processing speed.
Again any advice will be appreciated.