Date: Tue, 29 Sep 2015 15:51:56 +0200 From: InterNetX - Juergen Gotteswinter <jg@internetx.com> To: Graham Allan <allan@physics.umn.edu>, =?UTF-8?Q?Karli_Sj=c3=b6berg?= <karli.sjoberg@slu.se>, "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: Cannot replace broken hard drive with LSI HBA Message-ID: <560A977C.1070102@internetx.com> In-Reply-To: <560A9461.8090300@physics.umn.edu> References: <1443447383.5271.66.camel@data-b104.adm.slu.se> <5609578E.1050606@physics.umn.edu> <560A4640.3030200@internetx.com> <560A9461.8090300@physics.umn.edu>
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>From my Experience using SATA Disks on SAS Controllers, no matter if theres an Expander between or not or mixed, those Setups keep on beeing flakey / unreliable. I might work under certain conditions, but its nothing you can bet on. Garret Damore (Illumos Project) describes the problem more detailed here http://garrett.damore.org/2010/08/why-sas-sata-is-not-such-great-idea.html Am 29.09.2015 um 15:38 schrieb Graham Allan: > That could certainly be an issue in our case (it's all SATA, which I > guess at least is better than having it mixed). > > Although Supermicro do list some SATA drives as being tested compatible > with their chassis/expander, for example WD RE - not that we actually > have RE drives, it's what I would have preferred but we ended up with > Reds. I will say that I consulted informally with a WD field engineer > who felt that the Reds should work ok in this situation, and they have > generally tested quite well. No doubt the SATA RE model may well have > more solid firmware. > > Graham > > On 9/29/2015 3:05 AM, InterNetX - Juergen Gotteswinter wrote: >> Are there any Serial ATA Drives hooked up to the SAS Controller, maybe >> even with an Expander Backplane in between? >> >> Am 28.09.2015 um 17:06 schrieb Graham Allan: >>> I have seen this and keep experiencing it. I posted a question about it >>> a while back but I don't think there was much response.
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