ORA-00600: 内部错误代码, 参数: [kcratr_nab_less_than_odr], [1], [3313], [2328320], [2334233], [], [], [], [], [], [], []，这里面的最后两个参数的含义是什么？
这里的nab就是Next Available Block number in the Online Redo Log，也就是上述倒数第二个参数2328320。
这里的odr就是On Disk Rba中的block number，也就是上述倒数第一个参数2334233。
kcratr我猜是Kernel Cache Redo Application Transaction Recovery.要注意的是，如果nab小于on disk rba，这一定是不正常的！正常情况下不可能这样。
我们来看一个正常的例子：
online redo log header dump的内容：
DUMP OF LOG FILES: 3 logs in database
LOG FILE #1:
(name #3) /dras20/testdb/redo01.log
Thread 1 redo log links: forward: 2 backward: 0
siz: 0x32000 seq: 0x00000007 hws: 0xb bsz: 512 nab: 0x112 flg: 0x1 dup: 1
Archive links: fwrd: 0 back: 0 Prev scn: 0x0000.000e88e1
Low scn: 0x0000.000ed77f 12/06/2010 14:15:37
Next scn: 0x0000.40000001 12/06/2010 14:28:17
FILE HEADER:
Software vsn=153092096=0x9200000, Compatibility Vsn=153092096=0x9200000
Db ID=2489685178=0x946594ba, Db Name='TESTDB'
Activation ID=2511161407=0x95ad483f
Control Seq=1533=0x5fd, File size=204800=0x32000
File Number=1, Blksiz=512, File Type=2 LOG
descrip:"Thread 0001, Seq# 0000000007, SCN 0x0000000ed77f-0x000040000001"
thread: 1 nab: 0x112 seq: 0x00000007 hws: 0xb eot: 0 dis: 0
reset logs count: 0x2b616ad3 scn: 0x0000.000a5042
Low scn: 0x0000.000ed77f 12/06/2010 14:15:37
Next scn: 0x0000.40000001 12/06/2010 14:28:17
Enabled scn: 0x0000.000a5042 08/23/2010 15:57:07
Thread closed scn: 0x0000.000f2633 12/06/2010 14:24:59
Log format vsn: 0x8000000 Disk cksum: 0xdf7f Calc cksum: 0xdf7f
Terminal Recovery Stamp scn: 0x0000.00000000 01/01/1988 00:00:00
Most recent redo scn: 0x0000.00000000
Largest LWN: 0 blocks
Miscellaneous flags: 0x0
LOG FILE #2:
(name #2) /dras20/testdb/redo02.log
Thread 1 redo log links: forward: 3 backward: 1
siz: 0x32000 seq: 0x00000008 hws: 0xb bsz: 512 nab: 0xffffffff flg: 0x8 dup: 1
Archive links: fwrd: 0 back: 0 Prev scn: 0x0000.000ed77f
Low scn: 0x0000.40000001 12/06/2010 14:28:17
Next scn: 0xffff.ffffffff 01/01/1988 00:00:00
FILE HEADER:
Software vsn=153092096=0x9200000, Compatibility Vsn=153092096=0x9200000
Db ID=2489685178=0x946594ba, Db Name='TESTDB'
Activation ID=2511161407=0x95ad483f
Control Seq=1533=0x5fd, File size=204800=0x32000
File Number=2, Blksiz=512, File Type=2 LOG
descrip:"Thread 0001,