From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asdo Subject: Re: ANNOUNCE: mdadm 3.1.2 - A tool for managing Soft RAID under Linux Date: Thu, 11 Mar 2010 12:25:22 +0100 Message-ID: <4B98D322.7010101@shiftmail.org> References: <19351.10758.612499.310262@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <19351.10758.612499.310262@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Neil Brown wrote: > I am pleased to announce the availability of > mdadm version 3.1.2 > > [CUT] > > Significant changes are: > - The default metadata has change again (sorry about that). > It is now v1.2 and will hopefully stay that way. > [CUT] > I remember some discussion about alignment for 1.1 and 1.2: is it possible on 1.2 to guarantee alignment of RAID device on the physical devices? 4K alignment would be needed on SSDs and 2TB disks w/ 4k physical 512b logical emulation. Actually on SSDs the alignment could be even more than 4k, I am not sure. Should we bypass the defaults and put 1.0 metadata on those? What was the downside of 1.0 so that it was not made default? Thanks for your great job