Date: Mon, 13 Dec 1999 02:33:10 -0800 From: David Greenman <dg@root.com> To: Mike Smith <msmith@FreeBSD.ORG> Cc: "Oliver Blasnik" <ob@omnilink.net>, freebsd-scsi@FreeBSD.ORG Subject: Re: Again: CRD-Raid-Controller and FreeBSD 3.x Message-ID: <199912131033.CAA06144@implode.root.com> In-Reply-To: Your message of "Mon, 13 Dec 1999 02:14:23 PST." <199912131014.CAA21782@mass.cdrom.com>
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>> Mike Smith wrote: >> >> > No. FreeBSD starts assuming that a drive will handle 64 tags, but it >> > expects that the drive will correctly report a queue-full condition so >> > that it can dynamically adjust this number downwards. >> >> And this could not work as far these maximum of 32 commands is host-based, not lun-based. > >That would depend on the configuration of the unit. It'd work well for >the single-drive case. > >> > This may solve the "problem", but it will substantially degrade >> > performance in the case where there's only one array on the controller. >> Right. But on the other hand enables tq without bothering on system-crashed :) >> Better slow than not running. > >Perhaps. Better fixed firmware than terrible performance. I've been reading all of this and I'm still wondering what this is all about. TeraSolutions has many of the CRD-5440-104 (LVD version) controllers in the field and have never had problems with them. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org Creator of high-performance Internet servers - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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