Large Dasd (3390 model F) Exploitation in VSE/ESA 2.6 and VSE/ESA 2.7: In order to exploit the Large DASD Support in VSE/VSAM, it is vital and essential to install the PTF for APAR DY46113 which prevents the following problems:
Definition of a cluster with an allocation of only 1 cylinder and specifying Bufferspace less than 8704 bytes will result in a cluster that will overlap other files when loaded.
Definition of a Large DASD as a candidate volume, if initial volume is not a Large DASD, will result in an unpredictable allocation in tracks and overlapping extents upon extension to the Large DASD.