From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brown Subject: Re: Storage system Date: Fri, 07 Feb 2014 17:36:11 +0100 Message-ID: <52F50B7B.8020902@hesbynett.no> References: <20140206180909.GA2419@lazy.lzy> <52F49433.8080904@hesbynett.no> <52F505B3.2050902@hesbynett.no> <52F508EF.7090808@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <52F508EF.7090808@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Can Jeuleers , Mdadm List-Id: linux-raid.ids On 07/02/14 17:25, Can Jeuleers wrote: > On 02/07/2014 05:11 PM, David Brown wrote: >> The only thing you can't erase are re-mapped sectors - but hopefully >> those will be rare! > > I wonder if using the Secure Erase feature destroys all sectors > (including remapped-ones) or not. > I think secure erase can be done in different ways. On disks that have full-disk encryption, it simply erases (or changes) the password. For other drives, it has to write through all sectors on the disk - I would expect re-mapped sectors are included, but I don't know the details. > Also, what level of trust do people on this list have that the disk's > Secure Erase feature does what it says on the tin?