hi,
if some one has some time to spare
it might worth a try to have a look into the extra.lzma /etc/jun.patch
jun is using that to patch (diff files) dsm config files at boot
on 916+ he is patching synoinfo.conf to maxdisks=12
(there might be a mistake in that case as he sets the intern disks to 0xff instead of 0xfff? - maybe just a typo no one recognized before?)
that could also be done on 3515/17 to achieve a higher disk count and activate shr and as patch (diff) kicks in if it exactly matches it could be done in a way that it kicks in when the already modded synoinfo.conf is reset to the default one like when a dsm update reseting the synoinfo.conf
mostly interesting for people with a higher disk count then 12
any one willing to do and test it?
if done and tested it could be part of the extra.lzma i do for the additional drivers (extended jun.patch file)
like new default disk count to 24 (needs to touch maxdisks, usbportcfg, internalportcfg, esataportcfg) and activate SHR
in best case there will be much less hassle when updating dsm