I did some comparison and it comes out that ERST-2 is much worse than Intel RST when it comes to RAID10 performance..... about three times for burst transfers 87MB/s vs 237 MB/s on Intel RST. Altough I feel defeated by not beeing able to do what I wanted to, eventually I ended up with a better solution.
Unfortunately UEFI installation is not supported on ESRT2. And ESRT2 only support one VD on RAID 10, so seems it's a deadend.
The workaround is to either switch to RST, or select a different RIAD level (RAID 1 or 5) which supports multiple VDs.
Just curious, how did you test the performance?
I have used HD Tune and Anvil. It is kind of pity that I did not save ESRT-2 results. I can still re-do and save the ones for Intel RST.
Of course testing the drive/array with the OS installed and running on it will never give accurate results, but you can get the basic camparison.
Additional interesting thing that I did not mention is that minimal transfer speeds were worse for Intel RST, even as low as 18 MB/s.
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I have a similar problem, but with Linux. I have got a workaround.
This may be very unviable in Server environments, but works: Use an USB drive to store the bootloader.
In almost any linux distribution, you can store grub and the /boot/efi folder wherever you want, including USB drives.
On Windows, you can try this: WiNToBootic - the ultimate Windows 7/8 USB Boot Disk Maker
I use USB sticks for ESXi 5 hypervisors boot having a cloned backup unit near the server. It is not unviable. It might be a little bit problematic, that's all.
Thanks for your reply.
Wait... Are you using ESXi with E-SRT2?