We just finished installing a new 4 drive sdlt library. We setup 4 large chunks of data on 4 different severs on the network to do throughput testing. We found some very interesting things during the tests. Basically we the original 100/full nic we were using was not even close to providing enough bandwidth to the drives. We attempted to team (Compaq) 4 nics but were having problems with getting the 4th to pass traffic. But every additional nic we added increased the throughput performance of the library. We then yanked those and install a gigabit fiber card. The total bandwidth being used by the 4 drives was 350mb/s.
Warren J. Bennett -----Original Message----- From: Bendall, Paul (KBPB) [mailto:[EMAIL PROTECTED]] Sent: Monday, April 08, 2002 3:41 AM To: NT 2000 Discussions Subject: RE: Veritas backup rate? We are using the Netbackup software from Veritas and achieve about 10GB per hour from our fileservers, this is to a SDLT robot. The biggest thing we saw, after disabling anti-virus was making sure all Netcoms equipment, NIC, switches, etc were set to 100 full-duplex, if anything was left at auto sensing we got awful transer rates. Regards, Paul -----Original Message----- From: Douglas, Josh D. [mailto:[EMAIL PROTECTED]] Sent: 03 April 2002 18:23 To: NT 2000 Discussions Subject: RE: Veritas backup rate? I average about 110 mb/min (if the target computer is on the same switch as the backup server). We get 8-10 mb/min if we try to back something up from a computer on the same stack but different switch. We have 3com superstack 3300 and we think that it is because of different firmware versions between the switches in the stack. This has taken awhile to pin down and Veritas said that the speed would have nothing to do with them and to check the network. We don't seem to have any network issues other than backing up. We are upgrading our switches later this week so if this helps us I will post the results -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 03, 2002 11:18 AM To: NT 2000 Discussions Subject: Veritas backup rate? Is anybody using Veritas Backup Exec 8.6 and if so, what is you approximate backup rate? (For example 30 MB/min) I seem to be getting about 10 to 15 MB /min, regardless of what type of hardware I use. Windows 2000 Server SP 2 Veritas Backup Exec 8.6 Dual P3 800 Mhz 512 MB RAM 2 SCSI U160 IBM Hard Drives Adaptec U39160 Adaptec 2940U2 Benchmark VS Tape 640 ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% This email and any files transmitted with it are intended solely for the addressee(s) and may be legally privileged and/or confidential. If you have received this email in error you may not copy, forward or use the contents, attachments or information in any way. Please destroy it and contact the sender via our switchboard on +44(0) 20 7475 6600 or via return email. Any unauthorised use or disclosure may be unlawful. Kleinwort Benson Private Bank give no warranty as to the accuracy or completeness of this email after it is sent over the Internet and accept no responsibility for change made after it was sent. Any opinions expressed in this email may be personal to the author and may not necessarily reflect the opinions of Dresdner Bank or its affiliates. They may also be subject to change without notice. ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% This e-mail message and all attachments transmitted with it are confidential and are intended solely for the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, or other use of this message or its attachment(s) is strictly prohibited. If you are not the intended recipient of this message, please notify Best Software, Inc. immediately by e-mailing [EMAIL PROTECTED] and destroy all copies of this message. Best Software, for the protection of our internal systems and those of our customers, blocks most email attachments. ------ You are subscribed as [email protected] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to [EMAIL PROTECTED]
