Date: Sat, 3 Oct 1998 22:16:11 -0500 From: Karl Denninger <karl@Denninger.Net> To: Terry Lambert <tlambert@primenet.com>, "Kenneth D. Merry" <ken@plutotech.com> Cc: tom@uniserve.com, dnelson@emsphone.com, bright@hotjobs.com, current@FreeBSD.ORG Subject: Re: Long IDE probes? Message-ID: <19981003221611.A17488@Denninger.Net> In-Reply-To: <199810040305.UAA21544@usr06.primenet.com>; from Terry Lambert on Sun, Oct 04, 1998 at 03:05:58AM %2B0000 References: <199809302005.OAA01044@panzer.plutotech.com> <199810040305.UAA21544@usr06.primenet.com>
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On Sun, Oct 04, 1998 at 03:05:58AM +0000, Terry Lambert wrote: > > That's not really the point of the delay. The point of the "bus settle" > > delay is to allow devices to recover from the bus reset that we send at > > boot. As Justin pointed out, modern devices take a relatively short period > > of time to do this (100ms or so), but older devices may take longer. > > Uh, so why are we sending a reset? Is it merely to allow us to wait? > > > Terry Lambert > terry@lambert.org For 1542s you can shut off the BIOS entirely and thus not get a POST reset (There is no post in that case). I am unaware of a way to do this for PCI adapters. I understand the need for *ONE* SCSI reset as part of the boot sequence. But I fail to understand why we have to send one if the adapter is of a type where you *must* have already sent one (ie: AHA2940) -- -- Karl Denninger (karl@denninger.net) http://www.mcs.net/~karl I ain't even *authorized* to speak for anyone other than myself, so give up now on trying to associate my words with any particular organization. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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