Date: Sat, 17 Jul 2010 19:11:29 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Scott Long <scottl@samsco.org> Cc: "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org>, frank cheong <kwcheong@gmail.com>, Mike Hill <mike.hill@kitesystems.com>, Sean Bruno <seanbru@yahoo-inc.com>, Folkert Saathoff <folkert.saathoff@kitesystems.com> Subject: Re: /dev/ch0 not recognized Message-ID: <4C4254C1.9020803@scsiguy.com> In-Reply-To: <6EC599F1-3713-4497-9372-4032078890EF@samsco.org> References: <AANLkTik3mfTCcHwgYC4R5ANgf0ydBFkpUyjj90n0-uNP@mail.gmail.com> <6A0E4367-98BB-4C24-B01A-63A3E533D88C@kitesystems.com> <1278433685.2506.9.camel@localhost.localdomain> <AANLkTimjNuezI-yhDzpjnpVoUfp5tI9CwIWrWFN6_pSD@mail.gmail.com> <6EC599F1-3713-4497-9372-4032078890EF@samsco.org>
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On 7/8/2010 8:00 AM, Scott Long wrote: ... > With that note aside, you have to understand how this system works. It > doesn't follow the traditional rules of SCSI when it comes to device > discovery; instead the CISS firmware controls what devices are allowed to > be seen by the OS. My hunch on this is that these changers show up as non-zero luns on the tape device. Since the ciss driver tells CAM that the max-lun is 0, the changer device will never be probed. Even if this were changed, someone with more knowledge of the ciss_device_address format (i.e. how to pass through lun information to a physical pass-through device) would need to step forward so we could support this. -- Justin
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