Thanks for the reply The redo logs are there(see below) How do I "recreate the control files and reset logs" -rw-rw---- 1 oracle9 oinstall 104858112 May 02 10:50 redo02.log -rw-rw---- 1 oracle9 oinstall 104858112 May 02 03:19 redo01.log -rw-rw---- 1 oracle9 oinstall 104858112 May 01 08:27 redo03.log John ________________________________ From: Ghassan Salem [mailto:salem.ghassan@xxxxxxxxx] Sent: 04 May 2007 09:50 To: John Dunn Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Urgent ORA-00600: internal error code This indicates a failure to find current redo logs, try to insure they are there, otherwise try to recreate the controil file and reset logs; rgds On 5/4/07, John Dunn <JDunn@xxxxxxxxx> wrote: Following the replacement of a disk I did a mksysb restore on a AIX 5.2 machine running Oracle 9.2 All the Oracle software, data files etc were on a tar tape that has also been restored. But now when I try to startup Oracle I get the message ORA-00600: internal error code, arguments: [3004], [1], [0], [0], [], [], [], [] Does anyone have any advice or information on this error?