Periodically, a SMART event occurs on the hard drive that sits on port 2. How to be? What to do?

Question

Hard disks

Windows Server 2003 SP2, RAID 1, hard drives - st3500418as.

Answer 1

Good afternoon!
Your second hard drive has been running for 3.5 years, and judging by the number of reallocated sectors, it has not been idle for all these three and a half years. Remember: hard drives in servers are consumables, nothing more. They serve for several years, then they are subject to replacement, this is inevitable.
This is about SATA drives.
Therefore, in your case, it is advisable to buy two similar disks: replace one now, postpone the second one until the screw on the first port dies, and judging by its age, it may begin to crumble in the near future.