Hi i have a client who uses microsoft exchange server 2007. it is a dell power edge server and exchange is all it does. It is very reliable and very rarily goes off line. But just recently we had a server crash and the exchange server was off line for one day. It wasn't a disaster as it happened late on a friday and so was back up by saturday. what the client wants is a way ensure a 100% up time for the exchange server How can we achieve this

Use CCR or better yet, upgrade to Exchange 2010 and use Database Availbility Groups.

On Sun, 14 Aug 2011 17:20:29 +0000, belial-black wrote: > > >Hi > >i have a client who uses microsoft exchange server 2007. > >it is a dell power edge server and exchange is all it does. > >It is very reliable and very rarily goes off line. > >But just recently we had a server crash and the exchange server was off line for one day. > >It wasn't a disaster as it happened late on a friday and so was back up by saturday. > >what the client wants is a way ensure a 100% up time for the exchange server > >How can we achieve this You can't. 100% availability is impossilble. Hardware fails -- all of it -- at some point. Software fails, too. You can use expensive fault-tolerant hardware, Exchange 2010, and Database Availability Groups to come very close to 100% availabilty, but I thing the best you'll ever be able to achieve is five-nines (99.999%), and that's less than 5 minutes of "down-time" per year. Aim for four-nines (99.99%) and you'll be able to live with the 53 minutes of unscheduled down-time a lot more cheaply. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

On Sun, 14 Aug 2011 17:20:29 +0000, belial-black wrote: > > >Hi > >i have a client who uses microsoft exchange server 2007. > >it is a dell power edge server and exchange is all it does. > >It is very reliable and very rarily goes off line. > >But just recently we had a server crash and the exchange server was off line for one day. > >It wasn't a disaster as it happened late on a friday and so was back up by saturday. > >what the client wants is a way ensure a 100% up time for the exchange server > >How can we achieve this You can't. 100% availability is impossilble. Hardware fails -- all of it -- at some point. Software fails, too. You can use expensive fault-tolerant hardware, Exchange 2010, and Database Availability Groups to come very close to 100% availabilty, but I thing the best you'll ever be able to achieve is five-nines (99.999%), and that's less than 5 minutes of "down-time" per year. Aim for four-nines (99.99%) and you'll be able to live with the 53 minutes of unscheduled down-time a lot more cheaply. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP I use those 53 minutes to catch up on my soaps.

Hi Belial-black, If you want to achieve the exchange service online as possible as it can, it is better to use the HA. Some information for you: http://technet.microsoft.com/en-us/library/bb124721(EXCHG.80).aspx As above referred, it is impossible to achieve the 100% time online, but we could use the HA, let the email system more usable. Regards! Gavin TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.