Date: Thu, 06 May 1999 08:22:46 +0100 From: Mark Ovens <marko@uk.radan.com> To: Greg Lehey <grog@lemis.com> Cc: Questions <freebsd-questions@freebsd.org> Subject: Re: delays during boot Message-ID: <37314346.4A7CB5D@uk.radan.com> References: <37305116.DCBB1666@castle.net> <Pine.SC5.4.10.9905060858400.22338-100000@kiwi.pinnacle.co.nz> <19990506085525.J40359@freebie.lemis.com> <373137F5.3DE5DC6A@uk.radan.com> <19990506161419.I40359@freebie.lemis.com>
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Greg Lehey wrote: > > On Thursday, 6 May 1999 at 7:34:29 +0100, Mark Ovens wrote: > > Greg Lehey wrote: > >> > >> On Thursday, 6 May 1999 at 8:59:31 +1200, Jonathan Chen wrote: > >>> On Wed, 5 May 1999, gkaplan wrote: > >>> > >>>> During the boot process for 2.2.8 there are two significant delays is > >>>> the startup process. They both seem to relate to disk initialization > >>>> (ide) the combined time of delay is 30 to 45 second. Is there a > >>>> modification the I could make to the startup that would shorten this > >>>> time without causing an undesirable side effect. > >>> > >>> You could compile a custom kernel so that it doesn't probe for > >>> non-existent IDE devices. > >> > >> You can also disable them in UserConfig. > > > > On a closely related note, what is SCSI_DELAY for? The message says > > "waiting for SCSI devices to settle" but what exactly is "settling"? I > > can't set mine any lower than 10 seconds and get successful probes > > *every* boot. > > Ah, I know that one. Thought you might :-) > I just wrote it up for the new edition of "The > Complete FreeBSD" (at a bookshop near you Real Soon Now). :-) > In fact, I > had my cursor on it in another window. To quote: > > SCSI_DELAY is the number of milliseconds to wait after resetting the > SCSI bus. This is most evident when probing. This value used to be > in seconds: be careful when upgrading. > > Make sense? > Yes. I knew that much though (it's in the handbook). What I don't understand (but would like to) is what exactly are the devices doing when the "settle", i.e. from a h/w point of view, what happens to the devices that takes 10 seconds when the SCSI bus is reset? > Greg > -- > When replying to this message, please copy the original recipients. > For more information, see http://www.lemis.com/questions.html > See complete headers for address, home page and phone numbers > finger grog@lemis.com for PGP public key -- FreeBSD - The Power To Serve http://www.freebsd.org My Webpage http://www.users.globalnet.co.uk/~markov _______________________________________________________________ Mark Ovens, CNC Apps Engineer, Radan Computational Ltd. Bath UK CAD/CAM solutions for Sheetmetal Working Industry mailto:marko@uk.radan.com http://www.radan.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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