1. A method, comprising: defining, in a storage system comprising multiple storage devices, multiple redundant array of independent disks (RAID) configurations for data stored on the storage devices; assigning, to a first entry in a partition table having multiple entries, a first one of the multiple RAID configurations; wherein assigning the first one of the multiple RAID configurations to the first entry in the partition table comprises modifying an existing RAID configuration for the first entry, and comprising migrating the data referenced by the existing RAID configuration to the modified RAID configuration.