From owner-freebsd-scsi Wed Nov 1 13:57:56 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from mail.infolibria.com (mail.infolibria.com [199.103.137.198]) by hub.freebsd.org (Postfix) with ESMTP id 8F74737B4D7 for ; Wed, 1 Nov 2000 13:57:51 -0800 (PST) Received: from h201.infolibria.com (unknown [199.103.137.201]) by mail.infolibria.com (Postfix) with ESMTP id 8AC44DDBBE for ; Wed, 1 Nov 2000 16:59:36 -0500 (EST) Received: from loverso.southborough.ma.us (localhost [127.0.0.1]) by h201.infolibria.com (8.9.3/8.9.3) with ESMTP id QAA91048 for ; Wed, 1 Nov 2000 16:57:47 -0500 (EST) (envelope-from loverso@loverso.southborough.ma.us) Message-Id: <200011012157.QAA91048@h201.infolibria.com> To: freebsd-scsi@freebsd.org Subject: Re: iostat: tps for SCSI drives ... X-Face: "UZ!}1W2N?eJdN(`1%|/OOPqJ).Idk?UyvWw'W-%`Gto8^IkEm>.g1O$[.;~}8E=Ire0|lO .o>:NlJS1@vO9bVmswRoq3j DdX9YGSeJ5a(mfX[1u>Z63G5_^+'8LVqjqvn X-Url: http://surf.to/loverso Date: Wed, 01 Nov 2000 16:57:46 -0500 From: "John R. LoVerso" Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org This thread has made me wonder. I have a RAID-5 array connected to a DPT-5 controller using the "asr" driver in 4.1.1-R, but it is not using tagged queueing. The DPT-5 does use tagged queueing on another disk on the same controller: % camcontrol tags da0 (pass0:asr0:0:0:0): device openings: 255 % camcontrol tags da1 -v (pass1:asr0:0:1:0): dev_openings 1 (pass1:asr0:0:1:0): dev_active 0 (pass1:asr0:0:1:0): devq_openings 1 (pass1:asr0:0:1:0): devq_queued 0 (pass1:asr0:0:1:0): held 0 (pass1:asr0:0:1:0): mintags 0 (pass1:asr0:0:1:0): maxtags 255 and from a verbose boot: domino0: mem 0xfc000000-0xfdffffff,0xf8200000-0xf820ffff irq 23 at device 3.0 on pci1 asr0: port 0x2000-0x20ff mem 0xf8400000-0xf85fffff irq 16 at device 4.0 on pci1 asr0: major=154 asr0: DPT PM3754U2 FW Rev. 3010, 3 channel, 256 CCBs, Protocol I2O pass0 at asr0 bus 0 target 0 lun 0 pass0: Fixed Direct Access SCSI-3 device pass0: Serial Number 13011695HA pass0: Tagged Queueing Enabled pass1 at asr0 bus 0 target 1 lun 0 pass1: Fixed Direct Access SCSI-2 device da0 at asr0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-3 device da0: Serial Number 13011695HA da0: Tagged Queueing Enabled da0: 8754MB (17928681 512 byte sectors: 255H 63S/T 1116C) da1 at asr0 bus 0 target 1 lun 0 da1: Fixed Direct Access SCSI-2 device da1: 17507MB (35854336 512 byte sectors: 255H 63S/T 2231C) The RAID-5 is a "2+1" of three Seagate 39103LW drives. On a different machine with just an NCR controller, I do get tagged queueing with the drives: da0 at sym0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-2 device da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled da0: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C) Any idea why I don't see tagged queueing? Am I just confused (i.e., it shouldn't be enabled with a DPT-5 with a RAID-5)? Is I2O doing it under (and thus, transparent to) CAM? If I use "tags da1 -N 100", and start several concurrent operations on the disk, I do see tags in use: % camcontrol tags da1 -v (pass1:asr0:0:1:0): dev_openings 91 (pass1:asr0:0:1:0): dev_active 9 John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message