Background: Fresh installation, loader is 1.02b Chips for  2 port extender ASM1061.  Chips for  4 port extender Marvell 9215   When you use PCIE (or Mini-PCIE) sata extender , the HDD slot may not be follow the sequence For example. It gives HDD#1,2,5,6 instead of HDD#1,2,3,4   I did some reading in below links https://github.com/evolver56k/xpenology/blob/master/synoconfigs/Kconfig.devices It shows there are  three command may help to re-arrange