Date: Wed, 30 May 2001 14:22:17 -0700 From: Mike Smith <msmith@freebsd.org> To: Chris Dillon <cdillon@wolves.k12.mo.us> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: Mylex controllers? Message-ID: <200105302122.f4ULMHR02253@mass.dis.org> In-Reply-To: Your message of "Wed, 30 May 2001 15:28:12 CDT." <Pine.BSF.4.32.0105301504211.3554-100000@mail.wolves.k12.mo.us>
next in thread | previous in thread | raw e-mail | index | archive | help
> On Wed, 30 May 2001, Mike Smith wrote:
>
> > The controller isn't the problem, it's CAM. You could try this patch:
> [...snip...]
> > which will hide the physical channels from CAM. This means that
> > non-disk peripherals on the controller SCSI busses won't work,
> > which will get me another set of whining complaints from different
> > people. 8(
>
> Maybe, but probably not. I for one am not using it for anything but
> RAID volumes. I would never try to use a RAID controller for anything
> but RAID volumes (or even JBOD) anyway.
VA shipped a goodly number of systems with Mylex controllers running
their CDROM and tape drives. I've been complained at about it already. 8(
> You can't use non-disk devices with any of the other non-CAMified RAID
> controller drivers, can you?
I have passthrough code for mlx and amr, but I never released it due to
lack of testing time. In theory, yes, you can.
> If you think it would piss anybody off, make it a compile-time option
> wether or not the mly driver supports non-disk devices. Or even
> better, a sysctl tunable that can be set from the loader, just like
> hw.ata.* (hw.mly.cam_nondisk_filter?). My vote would be to _not_
> support non-disk devices by default, but that might break POLA. :-)
I'd like to say that I had the time to work on this properly, so that it
all "just worked" like it should. Unfortunately, I haven't, and I don't
want to get too entangled in it now, since I'm theoretically starting
with Apple fairly soon, and I'd just have to drop it all (_again_). 8(
Regards,
Mike
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-scsi" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200105302122.f4ULMHR02253>