From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f171.google.com ([209.85.223.171]:38836 "EHLO mail-ie0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929AbaKZBxh (ORCPT ); Tue, 25 Nov 2014 20:53:37 -0500 Received: by mail-ie0-f171.google.com with SMTP id rl12so1789132iec.2 for ; Tue, 25 Nov 2014 17:53:37 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <546AF572.2020101@swiftspirit.co.za> <20141118153526.GS20972@merlins.org> <47FB8035-FEA6-40E1-9672-5BBF92B283A9@colorremedies.com> <546BB2EA.5080809@ubuntu.com> <546CB332.3080705@ubuntu.com> <5474F5D1.2070908@ubuntu.com> Date: Tue, 25 Nov 2014 20:53:37 -0500 Message-ID: Subject: Re: scrub implies failing drive - smartctl blissfully unaware From: Rich Freeman To: Chris Murphy Cc: Btrfs BTRFS Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Tue, Nov 25, 2014 at 6:13 PM, Chris Murphy wrote: > A few years ago companies including Western Digital started shipping > large cheap drives, think of the "green" drives. These had very high > TLER (Time Limited Error Recovery) settings, a.k.a. SCT ERC. Later > they completely took out the ability to configure this error recovery > timing so you only get the upward of 2 minutes to actually get a read > error reported by the drive. Why sell an $80 hard drive when you can change a few bytes in the firmware and sell a crippled $80 drive and an otherwise-identical non-crippled $130 drive? -- Rich