Date: Sun, 12 Mar 2017 20:48:50 -0400 From: Mark Saad <nonesuch@longcount.org> To: Michael Fuckner <michael@fuckner.net> Cc: hackers@freebsd.org Subject: Re: Mini sas forward/ reverse cables ? Message-ID: <A1D22963-BAD8-4E47-B7ED-A0450DF9A7F2@longcount.org> In-Reply-To: <ca819d48-7aea-1485-4ca6-ea11847bb04b@fuckner.net> References: <4AF2C082-2494-42DE-B2C2-9C750BF39F76@longcount.org> <ca819d48-7aea-1485-4ca6-ea11847bb04b@fuckner.net>
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> On Mar 12, 2017, at 5:02 PM, Michael Fuckner <michael@fuckner.net> wrote: > >> On 3/12/2017 9:54 PM, Mark Saad wrote: >> All >> I read this post on zfs corruption and there is an interesting comment about cable types . >> >> http://changelog.complete.org/archives/9769-silent-data-corruption-is-real >> The part of the story I found interesting was how the disks didn't show up in the controller bios . > > I have that issue with a similar card on this server . So has anyone > ever seen this cabling issue ? Is it worth changing? How do I know > > which cable I have ? > > > it's pretty straight forward- if your controller is multilane and backplane single- you need a straight cable. This is the default! > > If your controller is single and your backplane is multilane, your cable needs to be cross over. If it is working, there is no need to change. > What sort of markings would I look for ? Are the connections different ? Also the post indicated it was something they overlooked on their initial buildout that gave them a working ( albeit poorly ) setup . > Regards, > Michael! > > > --- Mark Saad | nonesuch@longcount.org
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