I have four Seagate 1.5TB ST31500341AS drives configured with RAID5. The box has been running flawlessly since July 2011. I currently have f/w rev1.03 and "Used Space: 3781079 MB", "Unused Space: 642025 MB".
Suddenly on Wednesday night while streaming a show from the NAS via a media streamer, performance became erratic and I checked the admin pages to see the fourth drive listed as "Abnormal" and the "Sync Time Remaining" defined as "Degraded". I tried to shutdown but the system wouldn't shutdown properly so I pulled the power.
I came back to it tonight and plugged it back in. It still shows "Sync Time Remaining: Degraded" but now the drive shows as "Normal".
I've ordered a new ST31500341AS in case the problem really is the drive but I have some questions that I thought the experts here migh be able to help answer:
- If the drive now shows as "Normal", should I click "Re-configure All Existing Hard Drive(s)" and see how long things last? Or is it risky in case the drive is faulty and the rebuild fails midway?
- I've ordered the new Seagate drive now but I'm curious about whether I needed to buy the exact same model. Would I have been fine with any 1.5TB drive?
- When the new drive arrives, what are the steps to get my system back up and running again?
Thanks so much for taking the time to read this far.