On Tue, Jan 5, 2010 at 3:00 PM, Phil Stracchino <ala...@metrocast.net> wrote: > Brian Debelius wrote: >> I'm not seeing anywhere close to 60M/s ( < 30 ). I think I just fixed >> that. I increased the block size to 1M, and that seemed to really >> increase the throughput, in the test I just did. I will see tomorrow, >> when it all runs. > > Yes, if you aren't already, whenever writing to tape you should almost > without exception (and certainly on any modern tape drive) be using the > largest block size that btape says your drive supports. >
I tried to do that years ago but I believe this made all tapes that were already written to unreadable (and I now have 80) so I gave this up. With my 5+ year old dual processor Opteron 248 server I get 25MB/s to 45MB/s despools (which measures the actual tape rate) for my LTO2 drives. The reason for the wide range seems to be compression. John ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
