I had a similar problem (unable to select some nodes in vCenter).  In the end, I had to manually install the SDC package via the "esxcli software vib..." command.  Here is a good link to reference to manually install the package:  Install scaleio 1.31 SDC on esx 5.5
Hi,  We have ESXi node with only SD card for ESXi OS, no real local disk.  I would like to install SDC on the ESXi. We will add some disk on some ESXi in the futur, but not now.  I install 1.32 with the PS1, web plugin,  SVM template. (VCENTER 5.5U2)  When i want to install SDC, I only see my node with disk, not all the node with SD card. (a spare cluster and a little cluster, not the 3 others clusters)  May be there are a check somewhere ?  Regards
Installation of SDC on ESXi without disk (only SD card)