If variable-length symmetric key tokens are to be stored in the CKDS, any existing CKDS must be converted to a variable length record format.
To convert to the LRECL = 1024 format, ICSF provides the conversion utility program, CSFCNV2, that converts a CKDS to the variable length format. See Converting a CKDS from fixed length to variable length record format for more information.
To convert to the KDSR format (HCR77A1 or later), see Migrating to the KDSR format key data set for more information.
There is no reason to migrate a variable length record CKDS if your applications are not using AES or HMAC keys in variable-length tokens. You can migrate to the variable length record at any time.
To migrate to a variable length CKDS (LRECL=1024):