I have faced the same problem this week.
Make :
BLEQI:EQU=XX-XX-XX-XX;HDU BUS
FIMOE:SUBFS=SYSSUBFS11;
FIMOE:SUBFS=SYSSUBFS21;
IOSIE::NODE=SYSN,IODEV=SYSDISK1
IOSII:NODE=SYSN,IODEV=SYSDISK1,BTYPE=ATA,SUBFS=SYSSUBFS11 &SYSSUBFS21;
FIMOI:SUBFS=SYSSUBFS11;
FIMOI:SUBFS=SYSSUBFS11;
BLEQE:EQU=XX-XX-XX-XX;