In message <20121018190231.ebda7204...@gemini.denx.de> I wrote: > > I see very poor performance with HP Ultrium LTO3 drive, which is > attached over SCSI to a Linux box (using a Adaptec 2940 Ultra SCSI > adapter). It seems I cannot get more than about 8.8 MBytes/s for > either writing to or reading from the drive.
The comments I received supported my suspicon that the limiting actor might be the old SCSI adapter. I switched to a LSI Logic / Symbios Logic 53c1010 66MHz Ultra3 SCSI Adapter on the hardware side, and experimented a bit with the block size, confirming earlier postings here that this should be chosenin the 1024 ... 2048 KiB range. With this setup I get now sustained data rates of 55...59 MiB/sec for uncompressible data, and data rates varying between 80...140 MiB/sec for compressible data. Thanks! Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de When some people discover the truth, they just can't understand why everybody isn't eager to hear it. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
