The issue here was a missing UID/GID
pair. Apparently when those are absent the default owner of the share will be root.
So my fstab line should look like this:
//132.13.6.5/Data /home/sro/Mount cifs username=sro,password=psw,nounix,sec=ntlmssp,rw,uid=1001,gid=1001
Two things:
- your UID/GID may not be
1001
so better check with theid
command first - you may want to use permission masks as detailed here.