This article describes prerequisites for installing WebSphere® Application Server for z/OS®.
You should plan on four 3390-3 DASD volumes (or equivalent storage) for the product target and distribution libraries and the product HFS as well as an additional 3390-3 DASD volume (or equivalent storage) for CustomPac dialogs and work datasets (if you install using a ServerPac or SystemPac®) or for SMP/E work datasets and relfile storage (if you install using a Custom-Build Product Delivery Offering).
There are significant performance advantages for those applications doing floating-point arithmetic if the machine has binary floating-point hardware.
The z/OS system used to install WebSphere Application Server for z/OS must run z/OS UNIX® System Services (z/OS UNIX) with an HFS or ZFS file system configured. For details, see z/OS UNIX System Services Planning.
Consult the Program Directory and PSP bucket for any additional required corrective service.