maximum speeds on a tape drive are kinda like maximum capacity on your broadband connection.
what's advertised and what you'll get are two different things. I have that same DELL drive, and I'm seeing about 60gb/hour, which I feel is reasonable for LTO3 with no compression... your numbers aren't even hitting that, which leads me to ask. What is the configuration of the box doing the backups, and the client providing the data? is the backup being pulled over a network? here's one of my network clients: Elapsed time: 3 hours 34 mins 31 secs SD Files Written: 83,231 SD Bytes Written: 92,136,797,057 (92.13 GB) Rate: 7157.3 KB/s here's a client on the same machien as the drive: Elapsed time: 2 hours 16 mins 11 secs SD Files Written: 300,876 SD Bytes Written: 146,902,220,286 (146.9 GB) Rate: 17972.1 KB/s When I ran the tape test, I was seeing numbers in excess of 50000kb/s ... so obviously there's a bottleneck in my system too, but not as bad as what you're describing. I think a big part of the slowdown is overhead from the shadow-copy service. Give us some more information about your setup and configuration. My server is a poweredge 2600 with dual 2.8ghz xeons, 2gb ram, and windows 2003 standard. The tape is alone on an adaptec ultra 320 pci-x controller. The disk array being backed up is 8 spindles, 10krpm, hardware raid 5 on a perc4 (ultra 320) controller. Gordon On 4/24/07, Sysadmin Worldsoft <[EMAIL PROTECTED]> wrote: > Hi Folks, > > I try to backup 193GB with bacula 2.0.3 on a tape library Powervault > 124T with LTO3. > > The backup take 7 hours to terminate. The specification for PV 124T is > "Supports maximum native transfer rates of 288GB/hr (LTO-3)" > > Any idea for this problem ? > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
