Special buffer requirements exist for the IXLCACHE REQUEST=WRITE_DATALIST request.

• Each buffer must be 4096 bytes long and start on a 4096-byte boundary.
• The area specified by BUFFER must be addressable in the caller's primary address space or from the caller's PASN access list.
• The area specified by the first entry in BUFLIST is the only BUFLIST area that can contain write-operation-blocks. That area must reside in 31-bit virtual storage. All other buffers pointed to by BUFLIST may reside in 31-bit or 64-bit virtual storage. Real storage addressed cannot be used.