Yea I'm using the latest BIOS, version: 11.0.1-0054
I'm using the Seagate Cheetah 15k rpm SAS drive as my boot drive, so disabling the LSI card's BIOS is not an option...
Also now I created a "short stroked" RAID5 partition on the LSI controller, with a usable partition size of 4TB.
I made this partition a GPT partition but I'm still able to boot from it because I have the Windows BOOTMGR on the Cheetah drive...
Performance is much better vs the ICH9R RAID5 for general usage.
However there seems to be a bottleneck in the LSI 8704ELP controller.
Because on the ICH9R I get ca 350MB/sec in max speed and then it falls down gradually to slightly below 200MB/sec at 8TB (It's ca 280MB/sec at 4TB)
But with the LSI controller I get basically a straight line at just below 300MB/sec, see screenshot below:
Here is the same test with the ICH9R instead, actual partition size is 8TB but I short stroked it to the same size as the LSI is limited to for this test:
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