Thanks Al. All used to be well before the upgrade from Win/Exch 2000 to 2003. We just upgraded to the latest Dell 2850 , dual CPU with 4Gb RAM. We still use the same Qlogic HBAs and FC4500 SAN. We use Netbackup for nightly backups. After the upgrades our backup window went from 2hrs to 6hrs. We are trying to identify what caused this. We thought switching to a disk to disk backup using NTBackup might throw some light. We are really baffled on this one. Thanks for your inputs. Regards, Raj -----Original Message----- From: Mulnick, Al [mailto:Al.Mulnick@xxxxxxxxxx] Sent: Monday, February 07, 2005 2:38 PM To: [ExchangeList] Subject: [exchangelist] RE: NTBackup throughput http://www.MSExchange.org/ Haven't done this in a while, but IIRC the theoretical limit of the software was somewhere at 32GB/hour per store (same as 5.5). So if you have more than one store at a time, you should be able to attain far more throughput (example, 4 SG's being backed up simultaneously ~ 32GB * 4 = 128GB/HR backup rate). Your numbers indicate about 9GB/hr. That's low. I'm pulling from memory here, but as I recall, there are several factors that can impact performance: 1) fragmentation: create multiple volumes for the backup target. One for each SG you plan to backup at a time. Ex: if you have 3 SG's, create three volumes to back these up. 2) disk speeds: both coming and going. E.x. if you have a latency issues getting information from disk or writing to disk, you'll see it here. Verify that you don't have any bottlenecks in the disks (target and origination); RAID configuration plays a part here as well. 3) server resources. If the server is slow, then your backups will be as well. If you're backing up on the same server that is running Exchange, that takes a bigger chunk. If you're backing up during online maintenance, that's a bad idea and you should change that. If you're backing up during the Index run or during AV background scan, then you should stop that. If you are backing up to a drive that is being AV scanned, that can consume more resources. Etc. 4) if isn't broke, don't fix it :) I have to throw that in there because you could be heading down a slippery slope with this. If it works for you, leave it alone. If you can't tolerate an all-night backup session, then you should look into it. Al -----Original Message----- From: Periyasamy, Raj [mailto:Raj.Periyasamy@xxxxxxxxxxxx] Sent: Monday, February 07, 2005 1:32 PM To: [ExchangeList] Subject: [exchangelist] NTBackup throughput http://www.MSExchange.org/ List, How many of us are using NTBackup for backing up the Exchange 2003 Information store in a Disk to Disk backup environment. What is the throughput I can expect in this environment. My throughputs are not more than 2.5MB/sec from disk to disk. All disks are SAN attached. I think this is way below what I should get. Thanks Raj ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: al.mulnick@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: raj.periyasamy@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx