Date: Mon, 03 Jul 2000 18:46:30 -0700 From: Mike Smith <msmith@freebsd.org> To: Nat Lanza <magus@cs.cmu.edu> Cc: scsi@freebsd.org, hackers@freebsd.org Subject: Re: SCSI HBA device detection? Message-ID: <200007040146.SAA00380@mass.osd.bsdi.com> In-Reply-To: Your message of "23 Jun 2000 13:10:26 EDT." <uoc66r0iarh.fsf@hurlame.pdl.cs.cmu.edu>
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> I'm writing a SCSI HBA driver that simulates a bus with some > ramdisk-backed disks attached to it. I've read through the HBA > tutorial in Daemon News, but I'm still unsure how to tell the system > about my pretend disk devices. I suspect part of the problem is that > I don't actually have real devices or a real IO bus. If this is meant to be an exercise in writing a CAM HBA driver, then you need to teach your disk-emulation code about the basic SCSI commands (INQUIRY, TEST UNIT READY, etc). The SCSI infrastructure will use these commands to automatically detect your drives. If you're writing a generic ramdisk, this is a really masochistic way to go about doing it. 8) -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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