I was able to install & boot Slamd64 (a 64-bit port of Slackware) with raid5 directly. I wrote a HOWTO on Slamd64's forums, but I can't access them now, but luckily I wrote a copy of my own: http://mbhtech.blogspot.com/2008/01/raid-expansion-and-beauty-of-xfs.html You'll need to put separate /boot from the rest, and I don't know whether this works with grub or not; I used LILO. I faced one problem a few months back where the array broke (one disk jumped out) and I couldn't access my system at all, because the system wouldn't boot from a degraded array. I had to put the installation CD and fix it from there. Maybe if I had compiled busybox into the kernel, I would've saved myself some trouble. Also, I read a few days back that you could pass a parameter to the kernel to make it boot a degraded array. I don't remember where or what the syntax was unfortunately. I hope this helps! P.S.: I'd skip LVM. I've been speed-testing it lately and its performance is quite crippling. The read speed of the array directly is 125 MB/s, while the Logical Volume reads at 43 MB/s only! 2009/9/8 Nagilum <nagilum@xxxxxxxxxxx>: > The way I worked around this is to boot off of a USB stick. > So grub is installed on the USB stick, reads the kernel and the initrd from > it, the initrd brings up the disk, the raid, the dm-crypt and the lvm, > mounts / from the lvm and boots it. > Kind regards, > > ----- Message from lfmarante@xxxxxxx --------- > Date: Fri, 04 Sep 2009 12:19:23 +0200 > From: lfmarante@xxxxxxx > Subject: Software Raid 5 work on ROOT ? > To: linux-raid@xxxxxxxxxxxxxxx > > >> Hello every body. >> >> I have a question in regard of booting linux under a raid 5. It is >> possible ? >> All the guides that I found on the net say to have a /boot not stripped, >> (raid1 >> is ok). [EX: >> http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml >> ] >> >> They say to have / not stripped too. And these guide show to have an raid >> 1 boot >> and / and create a LVM volume for /usr /opt /var /whatever that can be >> raid 5. >> It is not easiest to have directly / in raid 5 format ? >> If it's possible I would prefere to have raid 5 / >> There any particular configuration for grub to boot it? >> >> Thanks in advance. >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > ----- End message from lfmarante@xxxxxxx ----- > > > > ======================================================================== > # _ __ _ __ http://www.nagilum.org/ \n icq://69646724 # > # / |/ /__ ____ _(_) /_ ____ _ nagilum@xxxxxxxxxxx \n +491776461165 # > # / / _ `/ _ `/ / / // / ' \ Amiga (68k/PPC): AOS/NetBSD/Linux # > # /_/|_/\_,_/\_, /_/_/\_,_/_/_/_/ Mac (PPC): MacOS-X / NetBSD /Linux # > # /___/ x86: FreeBSD/Linux/Solaris/Win2k ARM9: EPOC EV6 # > ======================================================================== > > > ---------------------------------------------------------------- > cakebox.homeunix.net - all the machine one needs.. > > -- Majed B. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
