When you run gstat, how many ops/sec are you seeing?
Adrian On 17 January 2013 20:03, Dieter BSD <[email protected]> wrote: >> I am thinking that something fancy in that SAS drive is >> not being handled correctly by the FreeBSD driver. > > I think so too, and I think the something fancy is "tagged command queuing". > The driver prints "da0: Command Queueing enabled" and yet your SAS drive > is only getting 1 write per rev, and queuing should get you more than that. > Your SATA drive is getting the expected performance, which means that NCQ > must be working. > >> Please let me know if there is anything you would like me to run on the >> BSD 9.1 system to help diagnose this issue? > > Looking at the mpt driver, a verbose boot may give more info. > Looks like you can set a "debug" device hint, but I don't > see any documentation on what to set it to. > > I think it is time to ask the driver wizards why TCQ isn't working, > so I'm cc-ing the authors listed on the mpt man page. > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "[email protected]" _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
