I'll tell you what I think (but I am NO expert!) 50Gb of data with an SLA of 2 hours - how long does a full backup take? Also, look for Arcserve's technical support about how to restore a server. This would panic me because you have to (might have missed some steps but bear with me) 1 - possibly replace hardware (if you have got it there already!) 2 - reload OS and Backup agent 3 - restore System State backup 4 - install Exchange in DR mode 5 - restore exchange database I recently did something similar on Win 2000 and Exchange 2000 using Ntbackup on a local tape drive, Twin P4 Xeons and 2 Gb ram. Took over 5 hours from start to finish for a 7Gb database. Personally, I would suggest you setup a cluster of some sort or get some sort of real time replication software onto another server because if something nasty goes wrong, it will take you longer than 2 hours! Hope this helps (in some small way!) ...Spence ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: 03 June 2005 15:48 To: [ExchangeList] Subject: [exchangelist] Fwd: This is a test message http://www.MSExchange.org/ Hi, This is a test message. Now a day i don't get any answers for my questions. I wonder why?? Is that i am asking very tough question or Is it a very stupid question. I am willingly assuming that it is a tough one :) Please help. Regards Praveen R Praveen Ramaswamy <ramaswamy_praveen@xxxxxxxxx> wrote: Date: Thu, 2 Jun 2005 06:25:03 -0700 (PDT) From: Praveen Ramaswamy <ramaswamy_praveen@xxxxxxxxx> Subject: [exchangelist] Disaster recovery for Exchange 2003 : Clarification To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx> http://www.MSExchange.org/ Hi, I want few clarifications with respect to Exchange backup. I have Exchange 2003 SP1 running on Windows 2003, Hardware Dell 2850 with Mirroring for OS and RAID 5 for exchange database, LTO (10 Slot autoloader) tape drive is connected to backup server and backup is taken over LAN, Arc server backup software (11.0) I went trough the Disaster recovery planning and operations guide from MS, however I am not able to understand how exactly "restore the server" method works!! Taking full system backup is fine, but what is the exact procedure to restore in case of a system crash. It seems obvious that windows 2003 OS & backup agent needs to be freshly installed (in case of a failure) and then only I can restore from backup. But if I do so OS will not allow overwriting of system files! Is "restore the server" only for Exchange 2003 application???? I am not clear because document says "Windows 2003 full computer backup set" what exactly this means?? Can some one please explain me how "Restore the server" works. Also please let me know the best backup policy for a 50 Gb database and a SLA of 2 hour down time in case of major failure. Regards Praveen R