I have a three disk RAID-5 array on an older E200i HP card. One of the disks is showing the "drive is array predicted to fail soon" error in ACU and has the blinking amber light. I've ordered a new hard drive that will arrive today, but I'm trying to figure my best option.
1. Should I pull out the predicted to fail drive and replace it with this one and, I assume, it'll automatically start to rebuild the array?
2. Should I just add the new drive as a hot spare in an empty slot and just wait for this other drive to potentially fail?
Is a 'predicted to fail' drive likely to have an impact on hard drive performance? Our Exchange server has been much slower the past week, so I'm assuming so, but we do have other problems with this server (it's 8+ years old), so I didn't know if this is still the most likely cause of the recent latency issues. If it is the case, I would likely want to do #1 after a full backup, but at the same time, it's not actually failed yet, so I'm a bit undecided.