HP Storage Mirroring V5 Software - Manual (Page 108)

98 Failover, Failback, and Restoration
If DNS failover was selected, the clients will have to wait for the IP cache to expire, or type in “
ipconfig
/flushdns
” in a command window. This time can be adjusted by lowering the TTL (Time to Live) setting within
your DNS server’s configuration. For more information, refer to your DNS server documentation.
Failback and restoration
If your source experiences a failure, such as a power, network, or disk failure, your target machine will stand in
for the source while you resolve the source machine issues. During the source machine downtime, data is
updated on the target machine. When your source machine is ready to come back online, the data is no
longer current and must be updated with the new data on the target machine.
Before you begin to restore to the original source, resolve the issue(s) that caused the failure.
If the source server has to be rebuilt, follow the instructions in ”
Rebuilding the Source ” on page 109.
Recovering to the original source
1. After repairing/rebuilding the source server offline, bring the server up but leave the network connection
disabled by unplugging the cable or disabling the network interface adapter.
2. Stop all of the services on the source so that you can overwrite the data with the newer data on the target.
Because the source server cannot communicate with a domain controller because its network connection is
still inactive, this will take longer than normal. The following table lists the services that must be stopped, in
the order in which they must be stopped. Stop the services appropriate to your application.
3. On the target, open the Failover Control Center ( Start , Programs , Storage Mirroring , Failover Control Center ).
4. Double-click the target machine that is currently standing in for the failed source to login.
5. Highlight the failed source and click Failback . The failback script created earlier will automatically run.
During failback, Windows Event Viewer and the Storage Mirroring log record the failback events. When
failback is complete, the services will be stopped on the target and the Failback Complete dialog box will
appear.
Exchange 2007 Exchange 2000/2003 SQL
Microsoft Exchange Active Directory
Topology Service
MSExchangeSA MSSqlServer
Microsoft Exchange Anti-spam Update MSExchangeMGMT SQLServerAgent
Microsoft Exchange EdgeSync POP3SVC MSSearch (SQL 2000)/MSFteSQL
(SQL 2005)
Microsoft Exchange File Distribution IMAP4SVC MSSQLServerADHelper
Microsoft Exchange IMAP4 ResVC MSDTC
Microsoft Exchange Information Store MSExchangeES MSSQLServerOLAPService
Microsoft Exchange Mail Submission W3SVC MSDTSServer
Microsoft Exchange Mailbox Assistants SMTPSVC SQLWriter
Microsoft Exchange POP3 SQLBrowser (SQL 2005)
Microsoft Exchange Replication Service
Microsoft Exchange Search Indexer
Microsoft Exchange Service Host
Microsoft Exchange System Attendant
Microsoft Exchange Transport
Microsoft Exchange Transport Log Search
Microsoft Search (Exchange)
World Wide Web Publishing Service