All key data sets can be converted to KDSR format. Any system that will share the KDSR format key data set must be running HCR77A1 or later.
The conversion is done with the active key data set, and a new key data set with the proper attributes for the KDRS format must be allocated.
The conversion can be done by either calling the CSFCRC callable service or by using the ICSF panels. While the conversion is happening, all updates to the key data set being converted are suspended. At the end of the conversion, all systems in the sysplex sharing the key data set will be using the KDRS format key data set as the active key data set. All new updates are made to the KDSR format key data set.