You cannot downsize a Rcs.is from a snapshot. Data is not always stored sequentially in memory, so reducing the size of a disk can result in data loss or corruption.

When creating a snapshot, the entire disk is imaged, not only the data present on the disk. This means that you can only create Rcs.iss with as much disk space as the Rcs.is the snapshot was taken from, or more. There is no safe way to shrink a Rcs.is’s disk partitions.

A workaround to this is to create a smaller Rcs.is and then transfer your data over the new Rcs.is using rsync or a similar tool. Review our Community data migration guide for more details on how to do this.