On Feb 12, 2008 3:08 AM, David O'Brien <obrien_at_freebsd.org> wrote: > On Mon, Feb 11, 2008 at 02:51:10PM -0700, Scott Long wrote: > > I hate to say it, but SCSI speed negotiation broke with 7.0. > ... > > I'm working on fixing the problem, but it won't be fixed in time for > > the final 7.0 release. > > I know. > I hope I've added to the body of knowledge of where the problem started. > You told me previously it could have been the addition of the Domain > Validation code. Unfortuantely it isn't - it goes all teh way back to > the cut over to the "NEW TRANS" code. > > > and I don't know of a workaround other than to tell you to read the > > camcontrol manpage section on the 'negotiate' command and play with > > that. > > Using that I am not able to get U320 negotiatation. > > -- > -- David (obrien_at_FreeBSD.org) > > I was playing around with DTrace, tracing cam/xpt and the ahd driver and found out that if i comment the following code : if ((spi3caps & SID_SPI_IUS) == 0) spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; at line 6655 in sys/cam/cam_xpt.c my disks again negotiate as U320 : da0 at ahd0 bus 0 target 0 lun 0 da0: <SEAGATE ST336807LW 0C01> Fixed Direct Access SCSI-3 device da0: 320.000MB/s transfers (160.000MHz DT, offset 63, 16bit) da0: Command Queueing Enabled da0: 35003MB (71687372 512 byte sectors: 255H 63S/T 4462C) Unfortunately I began seeing again the "Invalid sequencer interrupt" messages that i was seeing before(with fbsd 6.2) with Seagate drives on Adaptec at U320 speeds, and I prey that they are harmless (as they used to be?) Of course this might be (and possibly is :) ) completely wrong, but i hope it can serve as a pointer to the problem with the negotiation. --NikiReceived on Sat Feb 16 2008 - 22:06:03 UTC
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