Date: Wed, 23 Jul 2008 19:28:41 -0400 From: Steve Bertrand <steve@ibctech.ca> To: ian j hart <ianjhart@ntlworld.com>, freebsd-stable@freebsd.org Subject: Re: unable to use gmirror on supermicro 5015b-mt Message-ID: <4887BEA9.7060900@ibctech.ca> In-Reply-To: <20080723220638.GF2010@lava.net> References: <200807221659.20396.ianjhart@ntlworld.com> <200807232123.52186.ianjhart@ntlworld.com> <20080723220638.GF2010@lava.net>
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Clifton Royston wrote: > On Wed, Jul 23, 2008 at 09:23:52PM +0100, ian j hart wrote: > ... >> As I suspected, no takers :) >> >> "Fix". >> >> In /boot/loader.conf >> >> hw.ata.atapi_dma="0" >> >> This allows kldload without hang. I'm sure that this fix will allow me to >> configure a mirror. I'll post back if I'm wrong. > > OK, but *probably* this is an indicator that you need to either > replace the cable (think you said you've tried that) or replace the > motherboard. If the cable is known-good and the other components are > known-good, and it won't run with DMA on supported hardware, something > is seriously wrong with this particular board and odds are too high > that it will die horribly later. (Not to mention that you'll be > hammering your CPU just to get lousy throughput out of it.) This was the same issue I experienced with the NVidia board that I mentioned in the 'taskqueue timeout' thread last week. As I mentioned thereafter, I used my workstation board (Intel), and everything worked fine (ZFS). I tried then to set up my Windows workstation on the NVidia board, and thereafter found out that it would ONLY operate in PIO(4), no matter what I did. Needless to say, the board was RMA'd, and I have a new Intel board on its way to handle the ZFS file system. > As you said in the other post, you've already spent hours of your > life you won't get back - do you want to sign up for some more hours > further down the road? IMHO, just replace the board. If you are not able to acquire DMA on the disk subsystem, you've lost already. > -- Clifton (suddenly questioning why I'm spending hours on mailing lists today) ...because your systems are running so smoothly, you have to be typing something to justify your office space? ;) Steve
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