Depends exactly what you mean with "durable". One machine with RAID10 can be pretty durable and solves the most common problems with disk issues, other risks can be managed too.
Ah, that brings back memories. Had 2 RAID 10 MySQL servers run for a decade without rebooting. One had an app db, the other a stats db, and the two replicated to each other.
Spinning disks and all, I was terrified to reboot them and have the boot disk fail (which was not on RAID).
The main disks failed once or twice which slowed the servers down considerably until rebuild of the raid finished. Very nervous time.
Durable in the database context refers to durability of transactions, i.e. your database does not lose a record of committed transactions. A good example is an ATM withdrawal.
Spinning disks and all, I was terrified to reboot them and have the boot disk fail (which was not on RAID).
The main disks failed once or twice which slowed the servers down considerably until rebuild of the raid finished. Very nervous time.