From owner-freebsd-fs@freebsd.org Tue Jan 22 19:05:06 2019 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8FCD814ABD9B for ; Tue, 22 Jan 2019 19:05:06 +0000 (UTC) (envelope-from andy@time-domain.co.uk) Received: from mail0.time-domain.co.uk (host81-142-251-212.in-addr.btopenworld.com [81.142.251.212]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail0", Issuer "mail0" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 98BD66ADC8 for ; Tue, 22 Jan 2019 19:05:05 +0000 (UTC) (envelope-from andy@time-domain.co.uk) Received: from localhost (localhost [127.0.0.1]) by mail0.time-domain.co.uk (8.15.2/8.15.2) with ESMTPS id x0MJ50lE033278 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 22 Jan 2019 19:05:03 GMT (envelope-from andy@time-domain.co.uk) Date: Tue, 22 Jan 2019 19:05:00 +0000 (GMT) From: andy thomas X-X-Sender: andy-tds@mail0.time-domain.co.uk To: Steven Hartland cc: Borja Marcos , freebsd-fs Subject: Re: ZFS on Hardware RAID In-Reply-To: <5463787a-984f-b941-c862-3cc8064dc372@multiplay.co.uk> Message-ID: References: <1180280695.63420.1547910313494.JavaMail.zimbra@gausus.net> <92646202.63422.1547910433715.JavaMail.zimbra@gausus.net> <1691666278.63816.1547976245836.JavaMail.zimbra@gausus.net> <92746659-4B3F-415C-BB6A-6C99837AFAF2@sarenet.es> <335e44ec-7c76-8dbd-f587-46e6a9266efc@multiplay.co.uk> <5463787a-984f-b941-c862-3cc8064dc372@multiplay.co.uk> User-Agent: Alpine 2.21 (BSF 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Rspamd-Queue-Id: 98BD66ADC8 X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [2.62 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.31)[-0.310,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_SPAM_SHORT(0.57)[0.575,0]; HFILTER_HOSTNAME_4(2.50)[host81-142-251-212.in-addr.btopenworld.com]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[time-domain.co.uk]; AUTH_NA(1.00)[]; NEURAL_HAM_LONG(-0.90)[-0.898,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: smtp0.time-domain.co.uk]; IP_SCORE(-0.14)[asn: 2856(-0.59), country: GB(-0.09)]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:2856, ipnet:81.128.0.0/12, country:GB]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Jan 2019 19:05:06 -0000 On Tue, 22 Jan 2019, Steven Hartland wrote: > On 22/01/2019 15:34, Borja Marcos wrote: >> >>> As you say its quite confusing, so hope that clarifies? >> I think so, I was trying to avoid confusion for newcomers, not intending to >> be fastidious. The JBOD term is ambiguous. This stuff drove me mad some >> time ago, not >> to mention the puzzled faces of the Dell salesmen when I said ?EGGS, BACON, >> RAID, RAID, RAID, I DON?T LIKE RAID!? ;) >> >> They thought I was nuts rejecting a ?hardware? RAID. And in some cases they >> almost refuse to sell servers with plain HBAs. >> > Oh had that too, they literally had no clue ;-) I had that too - in one of my other employments we buy loads of stuff from Dell and our account managers always used to be incredulous if we didn't want a hardware RAID controller. But this was a few years ago when most people buying servers wanted them for Windows Server use, not Linux or *BSD. Now RAID doesn't even come into the pre-sales talk anymore - whether it's because they're more aware of O/S's that do software RAID, or because most Dell HBAs now support JBOD/pass-thru or just because they know we've no intention of running Windows on their servers, I don't know. Andy