Meanwhile I got a proper NAS, the LaCie NAS PRO, and last week my Time Capsule died for the 2nd time in 6 years.
I managed to change some capacitors, and it's alive again...the hard drive isn't though.
I still don't know if the drive got damage when the capacitors fried, or the TC is no longer able to read the drive, but I get the error that internal disk needs repair.
I erased the drive in the AirPort Utility, but nothing changed, so I decided to replace this drive with a 3TB WD RED, but put it in the NAS, where I have 3 drives of this kind now, and 5.94TB for storage.
The speed that I get via ethernet is 111MB/s with 3 drives, and when I will have 5 drives I will get speeds up to 200MB/s.
So the Time Machine backups will be made on the NAS, and I will use the TC like a Airport Extreme, without any drive inserted.
Question: If I connect both my Mac Mini and the NAS to the Time Capsule ethernet ports via cat6, will I lose speed?
As far as I know, the TC has gigabit ethernet, so I shouldn't lose any speed.
Or would be better to skip the TC and connect the NAS, the Mac Mini and the TC also, to the main router, and let the TC to handle only the wireless network?
Could the TC slow down the ethernet network if I pass the NAS and the Mac Mini trough the TC ethernet ports?