On Wed, 2 Apr 2003 at 9:29pm, Gene Heskett wrote > On Tue May 28 2002 05:09, Bartho Saaiman wrote: > >I have a problem where my dumper is slow and the taper seems to be > > faster: > > > > > >STATISTICS: > > Total Full Daily > > -------- -------- -------- > >Estimate Time (hrs:min) 0:02 > >Run Time (hrs:min) 11:21 > >Dump Time (hrs:min) 9:42 9:42 0:00 > >Output Size (meg) 14818.3 14818.3 0.0 > >Original Size (meg) 20804.7 20804.7 0.0 > >Avg Compressed Size (%) 71.2 71.2 -- > >Filesystems Dumped 1 1 0 > >Avg Dump Rate (k/s) 434.8 434.8 -- > > > >Tape Time (hrs:min) 1:37 1:37 0:00 > >Tape Size (meg) 14818.4 14818.4 0.0 > >Tape Used (%) 74.1 74.1 0.0 > >Filesystems Taped 1 1 0 > >Avg Tp Write Rate (k/s) 2606.1 2606.1 -- > > > >Is there a way of changing this to speedup backups. > > However, in most cases, the speed of the drive itself will be the > overriding consideration of how long it takes to backup 14 > gigabytes. To use my own DDS2 drive and its about 390k/second > speed, 14 gigabytes would take nominally 10 hours, plus whatever > time the compression utility itself took. Your drive seems to > indicate its doing 434k/second, slightly faster than mine. so > you're doing it marginally faster.
Actually, Gene, I think you missed it. His tape is doing just fine (Avg Tp Write of ~2.5MB/s). It's his dump rate that's the limiting factor here. How is your system set up? Are you dumping to a holding disk on the same physical drive? What hardware and OS are we talking here? What are you using for a backup program? -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
