I have a TerraMaster D5-300 RAID setup, and recently one of my 12TB Enterprise Seagate hard drives failed. I replaced it with a 12TB Seagate Ironwolf drive, but the RAID isn't rebuilding. The RAID Manager software shows the new drive's capacity as 11176.0 GB, while the other drives are at 11177.9 GB, making it 1.9GB smaller. I didn't think about the capacity difference when I ordered, but I chose the Ironwolf because I'm tired of buying refurbished Exos drives that keep failing—this is the fifth one! Is there any way to get the RAID controller to accept this new drive, or am I going to have to rebuild the RAID and risk losing my data?
2 Answers
In RAID systems, even a small size difference can cause issues, especially if your RAID setup is particularly sensitive. If reseating doesn’t work, you might be forced to backup your data and rebuild the array. Just make sure you have a backup before you do anything drastic!
That size difference is actually pretty normal and shouldn't stop the rebuild. It might be more about how the RAID controller is interpreting the new drive. Sometimes there are reserved spaces in the RAID setup that make it seem like the capacities don't match. You could try reseating the drive or checking for any firmware updates that might help.
I thought the same thing too, but I'm worried because it's not blinking like it should when rebuilding. The solid green light and the constant beeping make me think there's a deeper issue.