Date: Sun, 16 Jul 1995 13:40:42 -0500 (CDT) From: Karl Denninger <karl@Mcs.Net> To: gibbs@freefall.cdrom.com (Justin T. Gibbs) Cc: karl@mcs.com, freebsd-hackers@freebsd.org Subject: Re: Twinchannel SCSI Adapter change Message-ID: <199507161840.NAA01161@Jupiter.mcs.net> In-Reply-To: <199507161819.LAA02943@freefall.cdrom.com> from "Justin T. Gibbs" at Jul 16, 95 11:19:17 am
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> >Good afternoon, > > > >I have changed the probe order on the twin channel SCSI 2742 adapter here to > >probe "b" first. > > > >The reason is this: > > > >1) "A" has both internal and external connectors. > >2) "B" has only an internal connector. > > I have made modifications to config and the "hard wired" scsiconf code > that will allow you to do this via the kernel config file. Once I have > fully tested it, it should go into FreeBSD-current. > > -- > Justin T. Gibbs > =========================================== > Software Developer - Walnut Creek CDROM > FreeBSD: Turning PCs into workstations > =========================================== Uh, I would suggest changing the code in the driver itself to probe in the opposite sequence. This is what I did here. This is a two-line "move the code" change, and since it requires no actual changes to the operational status of the software, is much safer from a testing perspective. It also requires no changes to the "hardwired" side of things. You just set "B" as the primary channel in the EISA configuration. Actually, an *IDEAL* implementation would look at the state of the primary channel bit in the EISA configuration and decide from that which to probe first. It *IS* in there for boot control. Frankly, I'm surprised that Adaptec didn't designate the internal-only connector as "A" instead of "B". It makes more sense. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - The Finest Internet Connectivity Modem: [+1 312 248-0900] | (shell, PPP, SLIP, leased) in Chicagoland Voice: [+1 312 248-8649] | 7 Chicagoland POPs, ISDN, 28.8, much more Fax: [+1 312 248-9865] | Email to "info@mcs.net" WWW: http://www.mcs.net ISDN - Get it here TODAY! | Home of Chicago's only FULL AP Clarinet feed!
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