Thought I was registered here but confused it with a sort of similar/named forum

turns out I was not despite being lurking for a long time.
Registered now to say a thanks for this thread, was picking up some 2TB NetAPP drives from mate at work as they were clearing out a few of the shelves they were SATA drives. As I was browsing through the 240 drives that were going to be crushed! Found Toshiba MG04SCA60EE, 6TB SAS drives, been wasting time with reformatting under LSI Option bios on HP Z840, which did nothing.
Thanks to this thread now have 4 drives happily reformatting at once in the Z840, very pleased as I have 28 of them, seem to be going much quicker than the 21 hours it took one to be formatted under the LSI rom, which as it turns out did not work.