My backed up archivelog file format is 'al_%U'. During recovery it shows the following error:

RMAN-06054: media recovery requesting unknown log: thread 1 seq 17 lowscn 671075

How to determine which archivelog is necessary? In RMAN format I can't indicate thread and seq yes(for simply finding archivelog during this error)?

I should have that archivelog... If I really have that archive log how to indicate it to my database?

Thank You a lot...

I wil be very glad if you provide me with some book that clearly explains backup and recovery strategy and examples(In Oracle)...


Partial Answer of my question:

If I type

RMAN> list backup; 

It shows me the thread, Seq and Low SCN of the logfiles in the backup set :D great!!

But there is one missing archivelog backup, what to do? How to register?(I am not using Catalog!)

1 Answer 1


You need to use the catalog command in RMAN to make the file known to the database (don't worry, this does not depend on a recovery catalog!)

  • @"Jack Douglas" Thank you, I also found it (happy) but ERROR: RMAN-03009: failure of catalog command on default channel.. ORA-19698 "achivelogName" is from different database: id=169869321, db_name=Bd?LORCL DATABASE NAME SHOULD BE ORCL not Bd?LORCL...What happened
    – kupa
    Commented Jul 21, 2011 at 19:39
  • is it possible that the archivelog file is indeed from another database as the error suggests? Commented Jul 21, 2011 at 20:09
  • @"Jack Douglas" No.. I was performing backups and recovery just for one database...very strange.. Also strange is db_name indicated in the error..What is "Bd?LORCL" very strange name..What happened don't know :? (Just for info My OS is Centos 5)
    – kupa
    Commented Jul 21, 2011 at 20:19
  • could the file be corrupt? Perhaps you can try alter system dump logfile Commented Jul 21, 2011 at 20:29
  • 2
    have you got some more backpieces to catalog? You can use catalog to catalog a whole directory at once (see start with in the page I linked) Commented Jul 21, 2011 at 21:03

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