I partitioned both disks on the Mac with Disk Utility (half each) and then made two Raid-1s. One is reserved for TimeMachine, the second for pure data. The reverse is not possible, a Raid-1 can no longer be partitioned.
TimeMachine is formatted in APFS, the second partition is formatted in MacOS extended. After a restart of the G-Raid, one of the disks is always not online. The repair took 60 hours last time.
Question:
Do the G-Raids not tolerate two partitions? or what is the reason? Is one of the disks already defective?

Question

I partitioned both disks on the Mac with Disk Utility (half each) and then made two Raid-1s. One is reserved for TimeMachine, the second for pure data. The reverse is not possible, a Raid-1 can no longer be partitioned. 
TimeMachine is formatted in APFS, the second partition is formatted in MacOS extended. After a restart of the G-Raid, one of the disks is always not online. The repair took 60 hours last time. 
Question: 
Do the G-Raids not tolerate two partitions? or what is the reason?  Is one of the disks already defective?

Accepted Answer

As soon as you operate them in Raid 1, you only see one disk, the other is automatically mirrored. You can also remove one of the two and you should still be able to access the data.

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