From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <38A1E06D.732A9B0@tkg.com> Date: Wed, 09 Feb 2000 16:47:25 -0500 From: Christopher Shaulis MIME-Version: 1.0 Subject: [linux-lvm] Configuring boot partition with LVM (fwd) Content-Transfer-Encoding: 7bit Sender: owner-linux-lvm Errors-To: owner-linux-lvm List-Id: Content-Type: text/plain; charset="us-ascii" To: "linux-lvm@msede.com" As of AIX 4.3.3, you can't boot off of a striped logical volume, although you can have your boot partition mirrored on multiple physical volumes. All of the physical volumes with a copy of the boot lv must be in the boot list. Thats new as of AIX 4.2.0, although you need a couple APARs to have it work right at that version. I can't remember exactly how they explained it, but IBM has a good reason for not allowing mirrored dump devices. I think the idea is that in order to catch the system dumping in the LVM code itself, you have to write the dump without the aid of the LVM. I think the way that works is that it precomputes a list of offset:extent lists for the device when it is brought online. If anyone really wants to know what goes on behind the scenes let me know -- I've got a couple colleagues that do AIX kernel development at IBM. You are allowed to have a secondary dump device but that only gets used if writing to the first device fails. Christopher From: Jens-Uwe Mager > At least the IBM people with the AIX LVM are able to make that > work. The only thing that they were not able for a long time is to > make system dumps work in such a configuration. But I believe that > even that works under AIX 4.3.x now.