ORA-00600 is an internal error , arguments: [%s],

The Oracle docs note this on the ora-00600 error:
Error: ORA 600
Text: internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s]
-------------------------------------------------------------------------------
Cause: This is the generic internal error number for Oracle programexceptions. This indicates that a process has encountered anexceptional condition.Action: Report as a bug - the first argument is the internal error number

An ORA-00600 is an internal error, and only Oracle Corporation knows the agruments.

Causes of this message include:
timeoutsfile corruptionfailed data checks in memoryhardware, memory, or I/O errorsincorrectly restored filesThe first argument is the internal message number. Other arguments are various numbers, names, and character strings. The numbers may change meanings between different versions of Oracle.

Action:
first: in mount mode "recover database"
second: or call/mail to oracle service centre.