ora-19505都是因为文件出错，无法读取造成的，有因为二进制文件被编辑的，如spfile损坏；有文件ftp丢帧的问题，如上面的case；
expdp 出错
$ impdp system/manager directory=DMP content=METADATA_ONLY dumpfile=CASCTRL01.DMP, CASCTRL02.DMP, CASCTRL03.DMP, CASCTRL04.DMP, CASCTRL05.DMP, CASCTRL06.DMP, CASCTRL07.DMP, CASCTRL08.DMP full=Y logfile=METADATA_ONLY_20130627.log job_name=my_job02 parallel=8
Import: Release 10.2.0.5.0 - 64bit Production on Thursday, 27 June, 2013 11:16:32
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39002: invalid operation
ORA-31694: master table "SYSTEM"."MY_JOB02" failed to load/unload
ORA-31640: unable to open dump file "/oradata1/dump/CASCTRL07.DMP" for read
ORA-19505: failed to identify file "/oradata1/dump/CASCTRL07.DMP"
ORA-27046: file size is not a multiple of logical block size
Additional information: 1
Additional information: 1514345468
Additional information: 4096
原因： 文件出错，重新ftp一次就可以了。
总结： ora-19505都是因为文件出错，无法读取造成的，有因为二进制文件被编辑的，如spfile损坏；有文件ftp丢帧的问题，如上面的case；
