New
#21
I guess that makes you one very lucky user.. or unlucky as you need to discover whether Storage Spaces can be migrated to 1709 successfully- and what to do to deal with this problem in general.
Suggest you take it up on technet (MS site) and report via the Feedback Hub app.
Meanwhile you need to consider your possibly dodgy disk - try a surface scan- and of course appropriate backups.
As you have Pro, you can use
to delay 1709 for a year