From owner-freebsd-fs@FreeBSD.ORG Wed Mar 25 00:44:25 2015 Return-Path: Delivered-To: freebsd-fs@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 11216B5C; Wed, 25 Mar 2015 00:44:25 +0000 (UTC) Received: from mail-ie0-x22b.google.com (mail-ie0-x22b.google.com [IPv6:2607:f8b0:4001:c03::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D5E45339; Wed, 25 Mar 2015 00:44:24 +0000 (UTC) Received: by iedm5 with SMTP id m5so11115231ied.3; Tue, 24 Mar 2015 17:44:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=+5x6tBqGTk9Aa8uT2m5/GVVzY/BMEHuykpOmTFP9zJM=; b=NcnRFUQYfk+0fwANuWk/JYdLSqQ34+QD1RuI/KJFbeZNur9NUTxJ3ytvAsjaUbH8C7 O+urcFEJFu7DTNz4UlwjIYlJhH/ks78BJdcz9Ly4Hu9caanesJ78nXhKpVa/YjZtE/JV dDkQqCPWNq1u5jbx8zlyRjZy44MML+iL5QvIwqof5oiCgariH+Lzx6+d0Ez3+5AojbMv kH2dP0+FK0vnD4xtbcb9GC1AxiLOI0LXjtX3ThYGRkz9BedkaczhJ7nqvxO1Bs2cz6Hl IaOJBGdrPDCRa2ABTWvqupSOf+5w84lk4/ZQNYHCT4jRUyzTteMMY4kd/+dtIBFpAllX DLJA== MIME-Version: 1.0 X-Received: by 10.50.97.41 with SMTP id dx9mr25924934igb.1.1427244264024; Tue, 24 Mar 2015 17:44:24 -0700 (PDT) Received: by 10.64.223.170 with HTTP; Tue, 24 Mar 2015 17:44:23 -0700 (PDT) Date: Tue, 24 Mar 2015 16:44:23 -0800 Message-ID: Subject: Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS From: Dieter BSD To: freebsd-fs@freebsd.org, freebsd-hardware@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Mar 2015 00:44:25 -0000 >> You can also find these drives inside the STDT8000100 external >> USB unit for a bit more at $300. It may or may not be the same. There are stories that it is difficult or impossible to talk directly to the drives in recent USB units without the usb-to-sata bridge. I have yet to find a usb-to-sata bridge that doesn't have problems. > Is the price predicted to go down further in the future? Disk prices were going down nicely until the great flood. Prices took over a year to return to pre-flood levels, and have been dropping *very* slowly since. The M&A activity reduced competition, which doesn't help. Governments can't be bothered to prohibit anticompetitive M&A activity. Increases in capacity per drive have slowed, perhaps due to the same reduction in competition. 3TB drives have been the best value in TB/$ for nearly 4 years. I bought some 3TB drives last month for $84.99 each (with free shipping). At the same TB/$ an 8TB drive should cost $226.64, and a 10TB drive should cost $283.30. The penguins added a new device manipulation library to support ZBC/ZAC. There might be things to learn there (mistakes to avoid?). http://www.zdnet.com/article/hgst-gets-closer-to-shipping-10tb-hdd/