Date: Tue, 13 Nov 2001 18:07:35 +0100 From: Bernd Walter <ticso@cicely8.cicely.de> To: Mark Costlow <cheeks@swcp.com> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: Dynamic SCSI device names Message-ID: <20011113180735.B36456@cicely8.cicely.de> In-Reply-To: <200111131555.IAA23559@shimi.swcp.com> References: <200111131555.IAA23559@shimi.swcp.com>
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On Tue, Nov 13, 2001 at 08:55:48AM -0700, Mark Costlow wrote: > > This seems like a newbie question, but I haven't been able to turn up the > answer in the handbook or list archives. > > If I have a FreeBSD 4.4 system with several SCSI devices, the kernel names > them da0, da1, da2, etc. at boot time, regardless of their SCSI IDs. If I > remove one of the drives, say the one labeled da1, and reboot, the kernel > renames them so that da2 becomes da1, da3 becomes da1, etc. > > So if I have a system where I periodically want to attach a drive and remove > it, I have to boot single user to fix fstab when the drive is added or removed > (or conspire to have it be the last drive on the last SCSI bus). I'm also > playing with a system that I want to have a spare boot disk, and I'd like to > have the device numbering nailed down so the spare drive can boot without > having to know how the SCSI chain has changed. > > So is there a kernel option to use static device naming by any chance? Or am > I missing something about why this dynamic naming is a good thing? You can hardwire scsi devices. See the LINT/NOTES file in src/sys/i386/conf for examples. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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