I apologize if this is a simple question but I have tried in every place I can google to resolve this before posting this. The problem I have (and hoping someone will help resolve) is: Setting up a MPIO SAS configuration it is important to me that I have multiple paths to a partition on each drive.. each drive has two partitions, but only one is of interest. So we normal have eg sdb, sdb1 and sdb2. However we only want to MPIO to sdb1. Manually this would maybe seem easy, but there is likely to be many many drives and hot-plugged in and out etc… so it seems sensible to use the option of black listing and exclusions from black lists so that DM only addresses sdx1….. but this is where my problems start and my hair fails out. I have tried reading everything I can find on this, and tried all options I can think of… but I cannot get it work like this. In fact I cannot seem to get it to by default see any of the partitions (without having to manually run something). I have even tried to blacklist ALL sd[a-z] (which seems to work) but exclude i.e. sdb1 which doesn’t seem to work. I really would appreciate any advice as I am sure that to someone who has the experience here will probably be able to resolve this in a couple of lines as opposed to my couple of years! Thank you -- Lucas