OOF Hardware errors are being received on paging device(s).
The wait state that causes this code is preceded by message DMKPAG415E CONTINUOUS PAGING ERRORS DASDxxx 010 The SYSRES device, on which DMKSAV is attempting to write a page
image copy of the nucleus, is not mounted or not ready. 011 An unrecoverable error, other than a machine check, occurred while DMKSAV attempted to write a page image cOFY of the nucleus on the SYSRES device. 012 The normal wait state code loaded by when it has completed
loading the nucleus. 013 The machine check handler encountered an unrecoverable error on
the Probable hardware error. 015 A SIGP issued to the attached processor during system initialization by DMKCPI or DMKAPI was unsuccessful. 027 An unrecoverable I/O error occurred or system input is incorrect. CP Diagnostic lids 1-405

CP Abend Codes
The CP abends, their causes and required actions are listed in the !ML31Q 1-406 IBM VM/370 Syste. Logic and Problem Deteraination--Volu.e 1