From owner-freebsd-hackers@FreeBSD.ORG Fri Mar 27 11:06:02 2015 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 0B7B9FCE for ; Fri, 27 Mar 2015 11:06:02 +0000 (UTC) Received: from mail.ijs.si (mail.ijs.si [IPv6:2001:1470:ff80::25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id ABFAFF20 for ; Fri, 27 Mar 2015 11:06:01 +0000 (UTC) Received: from amavis-proxy-ori.ijs.si (localhost [IPv6:::1]) by mail.ijs.si (Postfix) with ESMTP id 3lD0jK1w1zz1PP for ; Fri, 27 Mar 2015 12:05:57 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ijs.si; h= user-agent:message-id:references:in-reply-to:organization :subject:subject:from:from:date:date:content-transfer-encoding :content-type:content-type:mime-version:received:received :received:received; s=jakla4; t=1427454354; x=1430046355; bh=BVE foLeEV4TdjD3/FL4dv4m5jW6W+nWCPz4hVsW290c=; b=TbRkOEtjGfu/7D0BB9l ufb+fi1MV96YSs3zBPu4sRBNyfr6BziQCxuaLzc9WE6MMrCcxg8vteZ9FeGDCbQh cTameZPEaJ7A2R5BfgDALQ+iDFV/rMCEfoZIcNGhm+mxtHKqWB0PDsjpXVN+Qmm8 8iaSS8tI0n1aDjhIT/YZyi7w= X-Virus-Scanned: amavisd-new at ijs.si Received: from mail.ijs.si ([IPv6:::1]) by amavis-proxy-ori.ijs.si (mail.ijs.si [IPv6:::1]) (amavisd-new, port 10012) with ESMTP id acsTSoYnmN0l for ; Fri, 27 Mar 2015 12:05:54 +0100 (CET) Received: from mildred.ijs.si (mailbox.ijs.si [IPv6:2001:1470:ff80::143:1]) by mail.ijs.si (Postfix) with ESMTP for ; Fri, 27 Mar 2015 12:05:53 +0100 (CET) Received: from neli.ijs.si (neli.ijs.si [IPv6:2001:1470:ff80:88:21c:c0ff:feb1:8c91]) by mildred.ijs.si (Postfix) with ESMTP id 3lD0jF318zzF6 for ; Fri, 27 Mar 2015 12:05:53 +0100 (CET) Received: from sleepy.ijs.si ([2001:1470:ff80:e001::1:1]) by neli.ijs.si with HTTP (HTTP/1.1 POST); Fri, 27 Mar 2015 12:05:53 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Date: Fri, 27 Mar 2015 12:05:53 +0100 From: Mark Martinec To: Hackers freeBSD Subject: Re: Seagate Archive HDD Organization: J. Stefan Institute In-Reply-To: References: Message-ID: X-Sender: Mark.Martinec+freebsd@ijs.si User-Agent: Roundcube Webmail/1.1.0 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: Fri, 27 Mar 2015 11:06:02 -0000 2015-03-27 09:56, Igor Mozolevsky wrote: > On 27 March 2015 at 08:36, Wojciech Puchar wrote: >> what is a difference between "video recording" and normal SATA drives? >> except pricing of course. >=20 > The "video recording" HDDs have no, among other things, internal "long > recovery" mechanisms (hence the price) because unlike "data", "video" > doesn't really care if small part of a frame gets corrupted on disk=E2=80= =A6 AV disks support ATA streaming command set, are designed to last in high temperature always-on streaming digital AV environments, are silent, with Preemptive Wear Leveling (PWL) (the drive arm frequently sweeps across the disk to reduce uneven wear on the drive surface common to audio video streaming applications) (paraphrased from WD docs) Mark