RedShift wrote: > RedShift wrote: >> Hello >> >> >> Since linux 2.6, the md layer has a feature called partitionable >> arrays. So instead of having two disks, creating an identical >> partition table on both and then putting those partitions in RAID 1, >> you take those two disks and put them in one partitionable RAID 1 >> array (in mdadm terms, "mdp") and create a partition table on the new >> RAID device. The advantages are quite clear compared to the old >> non-partitionable arrays. >> >> My question is, is this supported by CentOS? The GTK installer doesn't >> provide a way to create such an mdp device and the integrated >> partitioning tool does not see for example md_d0 when I create it >> manually from the console. I expect we may have to wait on upstream to have installer support. Anybody with RHEL want to put in an official request? >> Another way to get CentOS on such a configuration would be to do >> everything manually, thus installing the base system by creating the >> necessary disk allocations and then rpm -i all the required packages >> to get it to boot. (I've done this before, it's not a big deal, you >> just need to follow a certain order - I remember documenting it >> somewhere but forgot). But since this method is probably not >> officially documented anywhere or even supported I'll most likely >> won't get any support if this setup were to fail somehow (like when >> upgrading between minor versions). >> >> I've tried STFW'ing, but searching for centos and partitionable arrays >> is too ambiguous. I tried googling too, and came up with lots of docs on "partitionable arrays", but nothing on installing. Can't say for sure without testing, but I suspect GRUB would choke on this. Would probably still need at least a /boot on a separate partition, or a standard RAID1. >> Thanks, >> >> >> Best regards, >> >> >> Glenn Matthys > > > As a follow-up, I found the documentation I wrote how to install CentOS > without any installer: > > > # First, setup your disks to your liking. You can use whatever you want > here, ... snip ... > (PS: I've also attached the documentation as install_centos.txt, but > mailman will probably strip it) Attachment came through fine for me. Very interesting - might make a nice Wiki article, and could be included on a LiveCD as a way of bootstrapping a CentOS install. Phil