Joined: 06 Sep 2007 Posts: 788 Location: Chennai, India
With the release of DFSMS/MVS 1.3, if VSAM data set is SMS-managed and defined as extended format(to use EA), the new size limit for an EA data set is determined by either
1. multiplying the CI size by 4 GB
2. multiplying the volume size by 59
The original limit was based on a 4-byte Relative Byte Address (RBA), but the new system uses an 8-byte RBA that creates a new limit of 128TB.