I have a Dell PowerEdge 2650 with hardware Raid - two drives in Raid 1, four drives in Raid 5. Originally, all six drives were the same size, but a while back I upgraded the Raid 5 array and kept the original drives as spares for the Raid 1 array. One of the Raid 1 drives has now failed, and I want to use the spare that I kept that used to be part of the Raid 5 array. Can I just insert the spare drive into the slot the failed drive came out of -- will the system accept it as a new replacement in the Raid 1 array, or will it be confused by the old data that's already on it?
If the server is up and running when you swap it over it'll be just fine, it'll recognise it as a new drive and start the R1 rebuild. I'm glad you asked, always makes sense to check if you aren't comfortable by you're fine this time.