M1015 RAID IT Mode - DOS findet Karte nicht

Well, in my case it turned out I did the simple mistake of not erasing the card's flash with the Mega RAID HW tool! Doh! Instead I wanted to erase the card with sas2flash's own erase command "-o -e 6", but that's not possible if it doesn't recognize the card. So in my case the part where you boot into DOS (works regardless of your motherboard's UEFI) and execute megarec -writesbr 0 sbrempty.bin; megarec -cleanflash 0 is the right path to choose. Only after the IBM branding is erased, does the sas2flash tool recognize the card. As a little drawback, you can't make a complete backup of the original ServeRaid firmware with megarec.exe. That seems to be only possible with sas2flash, which only works with LSI branded cards. But if you wanted IR mode back, the LSI firmwares are the better choice anyway, because they are still being updated regularly. So, meh, whatever.

Diese Schritte haben nocht ohne Probleme funktioniert:

Hope this is useful for some people, who got stuck because they used the wrong guide.

PS: Oh, important! After erasing the card with the MegaRAID HWR Contoller (sic!) Recovery tool, you have to reset its original SAS address! Otherwise it will be 0000000-0-0000-0000. Not nice if you use multiple completely wiped and then crossflashed former M1015s in one system. I'm not sure if the command sas2flash.efi -o -e 6 which can be seen in many guides also wipes the SAS address, you better check with sas2flash.efi -o -listsasadd. Anyway use sas2flash.efi -o -c <controller number, in case you have more than one LSI HBA!!!> -sasadd 500605b0xxxxxxxx. You can find the address on a sticker on your card, omit the whitespace and dashes.