> 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. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
