Rows to Draw:

Click "Update" to show the vdev layout below. Click "Shuffle" to see how ZFS distributes the data across the disks.

Each set of colored blocks in the diagram below represents a redundancy group. The darker blocks represent parity information and the paler blocks are user data. Each block is 16MiB of physical capacity on each disk. This application uses the same RNG algorithm and seeds as the ZFS code, so it should accurately represent how everything gets distributed in a dRAID vdev. The average imbalance ratio of the vdev and the physical on-disk size of each box is displayed at the bottom.