Date: Tue, 29 Sep 2015 20:04:41 +0200 From: Michael Fuckner <michael@fuckner.net> To: jg@internetx.com, 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: <560AD2B9.5040706@fuckner.net> In-Reply-To: <560A977C.1070102@internetx.com> References: <1443447383.5271.66.camel@data-b104.adm.slu.se> <5609578E.1050606@physics.umn.edu> <560A4640.3030200@internetx.com> <560A9461.8090300@physics.umn.edu> <560A977C.1070102@internetx.com>
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On 9/29/2015 3:51 PM, InterNetX - Juergen Gotteswinter wrote: > 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 > come on, the article is 5 years old, some things changed since then! - MUX Boards are unreliable and expensive- long time since I last saw those boards - SAS Disks are not just 10/15k high performance Disks anymore, most Nearline Disks are available with native SAS interface as well - if you pick the right disk there is no trouble using SATA Disks on SAS Expanders or SAS Controllers (they should have R/V sensors, optimized FW...). - if you use desktop drives in a shelf with lets say 24 slots you should not expect it to work ;-) Regards, Michael!
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