Windows Cluster

http://www.trinitygroup.ru/articles/cluster
http://technet.microsoft.com/ru-ru/library/bb124564(EXCHG.80).aspx
http://www.mssqltips.com/tip.asp?tip=1709
http://msdn.microsoft.com/en-us/library/ms189910(SQL.100).aspx
http://www.symantec.com/business/support/index?page=content&id=TECH128030&key=15227&actp=LIST
http://support.microsoft.com/kb/282227
http://www.mssqltips.com/tip.asp?tip=1721