From owner-freebsd-hackers@FreeBSD.ORG Thu Mar 26 14:44:35 2015 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 65AF4361 for ; Thu, 26 Mar 2015 14:44:35 +0000 (UTC) Received: from puchar.net (puchar.net [188.252.31.250]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "puchar.net", Issuer "puchar.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id C2D9E26F for ; Thu, 26 Mar 2015 14:44:34 +0000 (UTC) Received: Received: from 127.0.0.1 (localhost [127.0.0.1]) by puchar.net (8.14.9/8.14.9) with ESMTP id t2QEiVXu081817 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 26 Mar 2015 15:44:32 +0100 (CET) (envelope-from wojtek@puchar.net) Received: from laptop.wojtek.intra (localhost [127.0.0.1]) by laptop.wojtek.intra (8.14.9/8.14.9) with ESMTP id t2QEiSMB001241; Thu, 26 Mar 2015 15:44:28 +0100 (CET) (envelope-from wojtek@puchar.net) Received: from localhost (wojtek@localhost) by laptop.wojtek.intra (8.14.9/8.14.9/Submit) with ESMTP id t2QEiNdZ001238; Thu, 26 Mar 2015 15:44:23 +0100 (CET) (envelope-from wojtek@puchar.net) X-Authentication-Warning: laptop.wojtek.intra: wojtek owned process doing -bs Date: Thu, 26 Mar 2015 15:44:23 +0100 (CET) From: Wojciech Puchar X-X-Sender: wojtek@laptop.wojtek.intra To: "B. Estrade" Subject: Re: Seagate Archive HDD In-Reply-To: Message-ID: References: User-Agent: Alpine 2.20 (BSF 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (puchar.net [10.0.1.1]); Thu, 26 Mar 2015 15:44:32 +0100 (CET) Cc: "freebsd-hackers@freebsd.org" X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Mar 2015 14:44:35 -0000 that's fine.. i think firmware reserve SMALL part of media in non-shingled format as a log to keep small writes, and then in periods of low load it writes it for real. the chance of coalescing multiple writes gets high this way. seems fine for drive that is just used to do backups over net with rsync On Thu, 26 Mar 2015, B. Estrade wrote: > Interesting. The write up says it's "drive managed" and the host OS need not be be aware of the on disk SMR. Short of a real testimonial, it seems like it's just be seen as a normal drive. > > Brett > > Sent from my iPhone > >> On Mar 26, 2015, at 5:26 AM, Wojciech Puchar wrote: >> >> http://www.storagereview.com/seagate_archive_hdd_review_8tb >> >> i want to buy 2 such drives for backup server. >> >> This drives use shingled recording. >> >> Are anyone using them and can confirm they are compatible on software level with other disks? I understand average random write time would be 5-10 times slower than normal drive because of the need of rewrite few full tracks worth of data, but otherwise will then be compatible and can i use it as usual? >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > >