From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: let md auto-detect 128+ raid members, fix potential race condition Date: Wed, 02 Aug 2006 12:47:20 -0400 Message-ID: <44D0D718.5050505@tmr.com> References: <20060730124139.45861b47.akpm@osdl.org> <17613.16090.470524.736889@cse.unsw.edu.au> <44CF9221.90902@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Alexandre Oliva Cc: Neil Brown , Andrew Morton , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org List-Id: linux-raid.ids Alexandre Oliva wrote: > On Aug 1, 2006, Bill Davidsen wrote: > >> I rarely think you are totally wrong about anything RAID, but I do >> believe you have missed the point of autodetect. It is intended to >> work as it does now, building the array without depending on some user >> level functionality. > > Well, it clearly depends on at least some user level functionality > (the ioctl that triggers autodetect). Going from that to a > full-fledged mdadm doesn't sound like such a big deal to me. > >> I don't personally see the value of autodetect for putting together >> the huge number of drives people configure. I see this as a way to >> improve boot reliability, if someone needs 64 drives for root and >> boot, they need to read a few essays on filesystem >> configuration. However, I'm aware that there are some really bizarre >> special cases out there. > > There's LVM. If you have to keep root out of the VG just because > people say so, you lose lots of benefits from LVM, such as being able > to grow root with the system running, take snapshots of root, etc. > But it's MY system. I don't have to anything. More to the point, growing root while the system is running is done a lot less than booting. In general the root f/s has very little in it, and that's a good thing. -- Bill Davidsen Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a normal user and is setuid root, with the "vi" line edit mode selected, and the character set is "big5," an off-by-one errors occurs during wildcard (glob) expansion.