From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben DJ Subject: A few remaining questions about installing to RAID-10 Date: Thu, 1 Oct 2009 19:31:47 -0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I'm setting up new linux boxes, hoping to install whatever OS I choose to a software RAID array. I've got 4 identical SATA drives, and would ideally like to use RAID-10= =2E I've read a bunch of slightly stale How-To docs, and have a few questio= ns. (1) Can Linux boot from /boot on RAID-10? =A0Oldest info I found said n= o boot from RAID at all, then more recent docs said boot from RAID-1 works. =A0I found nothing on RAID-10. =A0What's the latest sccop on thi= s? (2) As far as I can tell, none of the installers in Centos, Ubuntu or Opensuse are RAID-10 aware. =A0Seems like the sanest way to get setup would be to boot from SystemRescueCD, do the partitioning and RAID creation, then re-boot from an installer disk using the pre-setup disks. Am I missing some other, simpler approach? (3) Assuming that I'll have to boot from RAID-1 (Just suspect that RAID-10 is not yet an option for /boot, but willing to be shown wrong!), I'm considering 3 partitioning/raid_config options, =A0(a) =A0 =A0DISK1 =A0 =A0 =A0DISK2 =A0 =A0 =A0DISK3 =A0 =A0 =A0DISK4 =A0 [ RAID-1 =A0/boot =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0] =A0 [ RAID-1 =A0swap =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 ] =A0 [ RAID-10 LVM, /root & 'other' parts =A0 ] =A0(b) =A0 =A0DISK1 =A0 =A0 =A0DISK2 =A0 =A0 =A0DISK3 =A0 =A0 =A0DISK4 =A0 [ RAID-1 =A0/boot =A0] =A0 =A0[ RAID-1 =A0swap =A0 ] =A0 [ RAID-10 LVM, /root & 'other' parts =A0 ] =A0(c) =A0 =A0DISK1 =A0 =A0 =A0DISK2 =A0 =A0 =A0DISK3 =A0 =A0 =A0DISK4 =A0 [ RAID-1 =A0/boot =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0] =A0 [ RAID-10 LVM, /root, swap & 'other' =A0 ] Are there any clear benefits/concerns of one config over the other? (4) In setting up the RAID arrays, I've got a choice of metadata versions. =A0It seems that the distros' installers default to "1.0", bu= t that "1.1" & "1.2" are both available, too. Should I just use the newest, 1.2? =A0Any problems if I do? (5) In whatever config is "best" in (3), above, is it still good advice to install the bootlader into multiple MBRs? For example, if I extend the RAID-1 over all 4-disks, then, I install the loader into all four MBRs? I think these are the last details I need to iron out before getting st= arted. Thanks for any help! Ben -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html