Date: Thu, 31 Aug 2000 13:13:50 -0700 From: Fred Condo <fred@condo.chico.ca.us> To: Greg Lehey <grog@lemis.com> Cc: John Turner <john@drexeltech.com>, freebsd-questions@FreeBSD.ORG Subject: Re: Tagged Queueing question Message-ID: <20000831131350.F2264@absinthe.condo.chico.ca.us> In-Reply-To: <20000831104349.E29115@wantadilla.lemis.com>; from grog@lemis.com on Thu, Aug 31, 2000 at 10:43:49AM %2B0930 References: <4.3.2.7.0.20000830083308.00b197f8@mail.johnturner.com> <20000831104349.E29115@wantadilla.lemis.com>
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On Thu, Aug 31, 2000 at 10:43:49AM +0930, Greg Lehey wrote: > On Wednesday, 30 August 2000 at 8:35:41 -0400, John Turner wrote: > > > > This message showed up in one my server's security check output > > today. I've never seen it before. Is it something I need to worry > > about? The server was rebooted yesterday, after about 2 months of uptime. > > > >> da1 at ahc0 bus 0 target 2 lun 0 > >> da1: <IBM DNES-309170W SAH0> Fixed Direct Access SCSI-3 device > >> da1: 80.000MB/s transfers (40.000MHz, offset 30, 16bit), Tagged Queueing Enabled > >> da1: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) > > Tagged queueing is a technique where the driver issues multiple > requests to the controller, and the controller automatically continues > with the next request after finishing the first, without needing > intervention by the driver. This improves performance. There's > nothing to worry about. Unless you have certain seagate drives. There was a discussion of seagate firmware bugs recently on -questions or -stable. That bug bit me until I disabled write-through on the scsi bios and used camcontrol to turn off tagged queueing at boot time. The original questioner's IBM drive should be okay AFAIK. -- Fred Condo + fred@condo.chico.ca.us Not since Tom Hanks won an Oscar has there been that much acting in Philadelphia. -- Sen. Joe Lieberman, about the Republican Convention. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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