Date: Thu, 31 Aug 2000 10:43:49 +0930 From: Greg Lehey <grog@lemis.com> To: John Turner <john@drexeltech.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Tagged Queueing question Message-ID: <20000831104349.E29115@wantadilla.lemis.com> In-Reply-To: <4.3.2.7.0.20000830083308.00b197f8@mail.johnturner.com>; from john@drexeltech.com on Wed, Aug 30, 2000 at 08:35:41AM -0400 References: <4.3.2.7.0.20000830083308.00b197f8@mail.johnturner.com>
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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. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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