I made the changes and even to disk the speed is doubled !I hope no issue or contras because it looks too easy ! GuidoElia HELPPC
_____ Da: Michael B. Smith [mailto:[EMAIL PROTECTED] Inviato: martedì 7 ottobre 2008 22.55 A: NT System Admin Issues Oggetto: RE: Comparing NT Backup speeds Registry Changes for Optimizing NTBackup The first optimization to make for NTBackup performance is to change some registry keys that affect buffering. These changes can have a very positive impact on performance when writing to tape, and a smaller impact when writing to disk. They are as follows (in batch file syntax): reg add "HKCU\Software\Microsoft\Ntbackup\Backup Engine" /v "Logical Disk Buffer Size" /t REG_SZ /d 64 /f reg add "HKCU\Software\Microsoft\Ntbackup\Backup Engine" /v "Max Buffer Size" /t REG_SZ /d 1024 /f reg add "HKCU\Software\Microsoft\Ntbackup\Backup Engine" /v "Max Num Tape Buffers" /t REG_SZ /d 16 /f These registry changes double the default values. Do note that they affect HKEY_CURRENT_USER, and not HKEY_LOCAL_MACHINE as you might expect. Therefore, you should execute NTBackup under the desired user to create the registry key before you attempt to set the above registry values. Regards, Michael B. Smith, MCITP:SA,EMA/MCSE/Exchange MVP My blog: http://TheEssentialExchange.com/blogs/michael Link with me at: http://www.linkedin.com/in/theessentialexchange From: Joseph L. Casale [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 07, 2008 11:59 AM To: NT System Admin Issues Subject: RE: Comparing NT Backup speeds Michael, What are these tweaks you speak of? jlc From: Michael B. Smith [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 07, 2008 6:26 AM To: NT System Admin Issues Subject: RE: Comparing NT Backup speeds Well a local device will usually be faster than a remote device. Ntbackup, with the registry tweaks, gives me about 1 GB per minute locally. But I don't have a dat-72 to compare to. My home GB LAN with a cheap crappy switch copies about 50 MB/min. So I'm thinking that two hours seems more likely than 9 hours. Regards, Michael B. Smith, MCITP:SA,EMA/MCSE/Exchange MVP My blog: http://TheEssentialExchange.com/blogs/michael Link with me at: http://www.linkedin.com/in/theessentialexchange From: HELP_PC [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 07, 2008 7:28 AM To: NT System Admin Issues Subject: R: Comparing NT Backup speeds Yes the DAT device is local. Not applied registry tweaks GuidoElia HELPPC _____ Da: Michael B. Smith [mailto:[EMAIL PROTECTED] Inviato: martedì 7 ottobre 2008 13.05 A: NT System Admin Issues Oggetto: RE: Comparing NT Backup speeds Have you applied the "standard" registry tweaks to increase the ntbackup buffer size? Is the dat-72 locally attached? Regards, Michael B. Smith, MCITP:SA,EMA/MCSE/Exchange MVP My blog: http://TheEssentialExchange.com/blogs/michael Link with me at: http://www.linkedin.com/in/theessentialexchange From: HELP_PC [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 07, 2008 1:59 AM To: NT System Admin Issues Subject: Comparing NT Backup speeds In a network 10/100/1000 copper a NT backup of the complete server to a Qnap device RAID-1 takes about 9 hours with verify (about 50GB) versus DAT-72 with separate card that takes half the time . Should be considered normal ? TIA GuidoElia HELPPC ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
