From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from spoolm1.tiscalinet.be (spoolm1.tiscalinet.be [212.35.2.50]) by dsl2.external.hp.com (Postfix) with ESMTP id 0A107482E for ; Sat, 25 May 2002 13:33:05 -0600 (MDT) Message-ID: <3CEFE702.7060503@freebel.net> Date: Sat, 25 May 2002 19:33:22 +0000 From: Joel Soete MIME-Version: 1.0 To: Peter Mottram Cc: "parisc-linux@lists.parisc-linux.org" Subject: Re: [parisc-linux] raid-1 on boot disk References: Content-Type: text/plain; charset=us-ascii; format=flowed Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: Hi Peter, Peter Mottram wrote: > Joel > > I did some playing with this some time ago. To have all filesystems under > md control then palo must understand two things: > > 1. how to read the md filesystem to get the kernel (can use the F0 > partition for kernel to get round this) I undurstand F0 is a special slice that PDC has to access to load ipl > > 2. how to use md / filesystem > Is a ramdisk (located in the special slice /boot) would not help? I thought to this because of my read on the use of lvm and evms structure system disk. Both write a script to build such ramdisk. > AFAIK these 2 things just don't work right now & Paul Bame has other more > important things to do with palo right now. > > The approach I take is to have a small / and small /boot as normal ext2 > partitions & automatically copy these over to spare / & /boot filesystems > on mirror + hot spare disk each night. Well ramdisk will avoid to have to do this 'manual' mirror on F0 and /boot but there are quasi-static and so easy to mirror with dd. On the contrary / is more dynamic so I do not see how do you realise the mirror of this fs? > All other filesystems (including > swap) are on md. If I update the primary boot disk's F0 then I also > update the F0 slice on mirror & spare disks. If the primary boot disk > fails then the system will go down but then can boot off the mirror. Make > sure you set up PRI and ALT boot paths correctly if you want this to > happen automagically & make usre the script which copies / onto the > mirror/spare modifies /etc/fstab appropriately! > > R. > PeteM I am now much more confident, I will try to have a look in more details. Many thanks for all information, Joel