RackStation RS18016xs+ comparison for SAS support?

Hi In my quest to solve the SAS HBA drive ordering problem, e.g. they do not enumerate as SD(x) and can change order of drives on boot depending on per drive spin up time, has anyone ever compared the current configuration files of the DS3615xs against a fully SAS supported RackStation version such as the RS18016xs+ etc.? As far as I am aware, the SAS supporting RackStation's use a dual port SAS backplane with a single LSI branded SAS HBA and there is nothing extra in the hardware to sup

I just make some modification to the kernel and boot loader. I remove the "patch" that prevent LSI card to return SYNO_DISK_SAS. I add debug informations at boot to display the type of disk DSM detects (SYNO_DISK_SATA, SYNO_DISK_SAS or SYNO_DISK_UNKNOW) You need to set loglevel=1 in GRUB or syslinux.cfg to see the debug informations. I also added sas_enclosure_max="14" and supportsas="yes" to synoconfig file. I reduce the retry want_idx from 15 to 5 to get faster boot when there