I'm not sure if this actually is/will be a problem, so I don't know if this question makes sense, but:
I have a pool with two two-disk mirror vdevs, using 10TB disks. This pool is now at 80% capacity, so I want to add another mirror vdev (with 12TB disks) to the pool to expand it. (I'd previously considered, and asked here about, converting the pool into a single RAIDZ2 vdev, but I'm not going to do that now.)
What are the repercussions of this in terms of the overall pool stability? That is, if I add another vdev, the existing data--which will be more frequently accessed, and more "important", than what I will be adding in the near future--will remain on the original two vdevs, which are presumably more fragmented than the new vdev. Is this correct, and if so, is it a problem? Is there any way to rebalance the pool so that the data is spread out better?
If it matters, this pool is used mainly for media storage and backups; the data doesn't change much.
I have a pool with two two-disk mirror vdevs, using 10TB disks. This pool is now at 80% capacity, so I want to add another mirror vdev (with 12TB disks) to the pool to expand it. (I'd previously considered, and asked here about, converting the pool into a single RAIDZ2 vdev, but I'm not going to do that now.)
What are the repercussions of this in terms of the overall pool stability? That is, if I add another vdev, the existing data--which will be more frequently accessed, and more "important", than what I will be adding in the near future--will remain on the original two vdevs, which are presumably more fragmented than the new vdev. Is this correct, and if so, is it a problem? Is there any way to rebalance the pool so that the data is spread out better?
If it matters, this pool is used mainly for media storage and backups; the data doesn't change much.