Chris Howells schrieb: > Michael Galloway wrote: > > nothing is solved yet. i rebooted everything this morning to make sure the > > scsi bus was cleared and reset. then i decided to try the individual btape > > tests to see if i could isolate the issue. the fill test is running all day > > still running: > > Does your LSI controller have hard disk RAID features? If so I suggest > that you disable it in the controller BIOS. Even better make sure that > you have an Initiator Target firmware installed (there appears to be one > for your HBA on the LSI web site). > > I have an LSI SAS3442X-R. I spent quite a few days trying to get decent > performance out of an IBM LTO 4 drive. I finally fixed it by removing > the IR (Integrated Raid) firmware and putting IT (Initiator Target) > firmware on instead. This basically removes the RAID features, and in th > > Before I could only get 70MB/sec (with a large block size -- something > like 20MB/sec with the default bacula 64k block size). I've not seen the > drive hit 200MB/sec, which is a very nice increase in performance. > > [EMAIL PROTECTED]:/etc/bacula# dd if=/dev/zero of=/dev/nst0 bs=262144 > count=100000 > 100000+0 records in > 100000+0 records out > 26214400000 bytes (26 GB) copied, 144.685 seconds, 181 MB/s > > BTW I think I agree with Kern now, huge block sizes don't help (though > they did help to mask the effects of dodgy LSI firmware), though > switching from 64k to ~256k does help.
It seems that you now have a better tuned system than I have. What have you done besides changing the HBA's firmaware to get this numbers? I'm still at 75 MB/s for bacula full backups and these numbers for dd: VU0EA003:~# dd if=/dev/zero of=/dev/nst0 bs=65536 count=100000 100000+0 Datensätze ein 100000+0 Datensätze aus 6553600000 Bytes (6,6 GB) kopiert, 59,7148 Sekunden, 110 MB/s VU0EA003:~# dd if=/dev/zero of=/dev/nst0 bs=262144 count=100000 100000+0 Datensätze ein 100000+0 Datensätze aus 26214400000 Bytes (26 GB) kopiert, 190,869 Sekunden, 137 MB/s Does scsi module report FAST-80 or FAST-160 for the connected drives during boot? Ralf ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
