The strange thing is someone helped me find from GTF trace when dumpping an extended format PS dataset, 56062 is used as tape dsn block size, however when reading the same tape dsn, 262144 is used.It is very confusing, and at the same time, the block size specified in JCL matched what's recorded in RMM, the z/OS is 1.13.
---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN