Oracle 10g RAC dual-node time not synchronized under AIX Solution

Oracle 10g RAC dual-node time not synchronized under AIX solution 1. A dual-node RAC of a customer is received, and the two nodes are not synchronized at two nodes. Ii. problem diagnosis 1. Check service status: Command crs_stat-t 2. Check time: the date node is two minutes faster than the second node. 3. check the ntp service: the command ps-ef | grep xntpd is found here that node 1 xntpd service is started, while Node 2 does not start www.2cto.com 4. check ntp configuration: command more/etc/ntp. conf Node 1 return result: server 127.127.1.0 prefer driftfile/etc/ntp. drift tracefile/etc/ntp. trace Node 2 returns result server Node 1 IP prefer driftfile/etc/ntp. drift tracefile/etc/ntp. trace 5. diagnosis Result: the ntpd service of Node 1 and node 2 is correctly configured, but Node 2 does not open the service. Iii. troubleshooting 1. back up ocr, votedisk, and ASM disk headers (Be careful first) ocrconfig-export/tmp/mophy/export ocrconfig-showbackup www.2cto.com dd if =/dev/vote_disk of =/tmp/mophy/vote20121011.bak dd if =/dev/rhdisk4 =/tmp/ mophy/rhdisk4_20121011.bak bs = 4096 count = 1 dd if =/dev/rhdisk6 of =/tmp/mophy/rhdisk6_20121011.bak bs = 4096 count = 1 dd if =/dev/rhdisk7 =/ tmp/mophy/rhdisk7_20121011.bak bs = 4096 count = 1 dd if =/dev/rhdisk8 of =/tmp/mophy/rhdisk8_20121011.bak bs = 4096 count = 1 dd if =/dev/rhdisk9 =/tmp/mophy/rhdisk9_20121011.bak bs = 4096 count = 1 2. stop Node 2 instances and services $ srvctl stop instance-d db_name-I rac2 -- disable a single instance $ srvctl stop nodeapps-n rac2 -- stop Node 2 Service 3. start Node 2's xntpd service # smit xntpd Start Both 4. check the process $ ps-ef | grep xntpd oracle 832436 933972 0 23:19:15 pts/0 23:08:09 grep xntpd root 938842 62396 0-/usr/sbin/xntpd www.2cto.com 5. check time synchronization # xntpdc-c peers remote local st poll reach delay offset disp ================== ========================================================== ====== * RAC1 10.88.250.2 4 64 77 0.00026 0.000181 0.37512 6. start Node 2 instance and service srvctl start nodeapps-n rac02 srvctl start instance-d db_name-I rac2 7. check the CRS status crs_stat-t 8. problem handled