Date: Fri, 22 Oct 2004 14:28:29 -0600 From: Scott Long <scottl@freebsd.org> To: Garance A Drosihn <drosih@rpi.edu> Cc: freebsd-current@freebsd.org Subject: Re: Annoying SCSI waiting... Message-ID: <41796D6D.7000108@freebsd.org> In-Reply-To: <p06110423bd9f1b6312ed@[128.113.24.47]> References: <417960C2.8040007@freebsd.org> <20041022194008.GA23778@odin.ac.hmc.edu> <41796396.5070804@freebsd.org> <p06110423bd9f1b6312ed@[128.113.24.47]>
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Garance A Drosihn wrote: > At 1:46 PM -0600 10/22/04, Scott Long wrote: > >> >> This is not just a problem with old disk drives, it's a problem >> with some cdrom and many tape drives. Maybe it can be set to 15 >> only if the sa, cd, and/or ch drivers are present. That still >> doesn't solve the problem with GENERIC, and I would like to keep >> GENERIC as compatible as possible. > > > One data point: I have dropped that value to 7 seconds (or less) > on every FreeBSD system I have ever built, for at least six or > seven years now. That goes back to a 60-MHz pentium, iirc (it was > a mean machine back when it was released, with a price-tag to match. > That machine is still the most expensive PC I have ever bought!). > > I don't know how low of a value would be safe, but I think we > could safely pick a value which is less than 15 seconds. > For just about everyone, a value of 2 seconds or less is just fine. For those with tape drives, changers, and (less likely) cdroms, a long delay after reset is still quite necessary. There are two knobs to adjust this, and I'd like GENERIC to remain compatible. It's 15 seconds, not 2 minutes. You get a longer delay that that just trying to set up the inital page tables on a large memory machine! Scott
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