The files in this directory are named according to the following pattern:

• The summary log file is named backSID.log, where SID is the unique name for the Oracle database instance.

• The detail log files are named encoded_timestamp.xyz, where:

  encoded_timestamp	A timestamp that is used in each detail log name that guarantees a unique file name.
  xyz for backup logs:
  x	a represents all, i represents incremental, p represents partial.
  y	n represents online. f represents offline.
  z	f represents util_file backup, r represents rman_util backup
  xyz for restore logs:
  xyz	rsb represents restore backup files.
  xyz	rsa represents restore archive files.
  xyz	rsf represents restore individual files.