Please Help me Solve ORA-00600: internal error code, arguments: [12209], [83], [], [], [], [], [], [

Dear Mr BobB & All Seniors Iam getting

1)ORA-00600: internal error code, arguments: [12209], [83], [], [], [], [], [], []

and

2)ORA-19504: failed to create file "+DG1/nmh/2_20710_588167527.arc"

Iam Using

Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options

Platform Sun Solaris SPARC (64-bit)

Could you plese anybody let me know if someone has faced this problem.

I Have Copied the part of alerlog file please Help me Out

Tue May 26 13:03:36 2009 Thread 2 advanced to log sequence 20707 Current log# 4 seq# 20707 mem# 0: +DG1/nmh/onlinelog/group_4.271.588168767 Current log# 4 seq# 20707 mem# 1: +DG1/nmh/onlinelog/group_4.272.588168767 Thread 2 advanced to log sequence 20708 Current log# 3 seq# 20708 mem# 0: +DG1/nmh/onlinelog/group_3.269.588168765 Current log# 3 seq# 20708 mem# 1: +DG1/nmh/onlinelog/group_3.270.588168767 Tue May 26 16:19:00 2009 Thread 2 advanced to log sequence 20709 Current log# 6 seq# 20709 mem# 0: +DG1/nmh/onlinelog/group_6.286.588418331 Current log# 6 seq# 20709 mem# 1: +DG1/nmh/onlinelog/group_6.287.588418331 Tue May 26 16:30:01 2009 Thread 2 advanced to log sequence 20710 Current log# 8 seq# 20710 mem# 0: +DG1/nmh/onlinelog/group_8.290.588418335 Current log# 8 seq# 20710 mem# 1: +DG1/nmh/onlinelog/group_8.291.588418335 Tue May 26 18:46:01 2009 Errors in file /u01/oracle/admin/NMH/udump/nmh2_ora_7029.trc: