From mboxrd@z Thu Jan 1 00:00:00 1970 From: Herta Van den Eynde Subject: Re: Does grub support sw raid1? Date: Thu, 23 Mar 2006 17:33:15 +0100 Message-ID: <4422CDCB.4070104@cc.kuleuven.be> References: <442020AD.7090902@cc.kuleuven.be> <44202F7A.80901@h3c.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <44202F7A.80901@h3c.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org, redhat-list@redhat.com List-Id: linux-raid.ids Thanks to all who confirmed that this should work, and gave pointers to= =20 more reading material. =46urther investigation proved that the problem is caused by the Smart=20 Array Controllers that HP uses. As these "Smart" controllers don't=20 allow for JBOD configs, I had configured each disk as RAID 0 at the=20 hardware level. When I remove disk 0, the controller detects that it i= s=20 not set up for fault tolerance, and fails the logical drive. As they apparently will only boot from the first logical drive defined,= =20 (which must have been the reason why I couldn't boot when I installed=20 Red Hat on drives in slots 2 and 3), you now need to go into the Smart=20 controller configuration utility, and delete the failed logical drive. My 2nd disk was configured in logical drive 2, which now is at the top=20 of the list, and therefore can boot just fine. I'm now struggling with getting the Smart Array controller to recognize= =20 the replacement devive, but that would be a question for an HP/linux=20 mailing list. I tried registering to=20 compaqandlinux-subscribe@van-dijk.net, which gets expanded to=20 compaqandlinux-subscribe@jedi.van-dijk.net, but that comes back with a=20 "user unknown in local recipient table". Does anyone know of a good "linux on HP" mailinglist? Kind regards, Herta Mike Hardy wrote: > This works for me, there are several pages out there (I recall using = the > commands from a gentoo one most recently) that show the exact sequenc= e > of grub things you should do to get grub in the MBR of both disks. >=20 > It sounds like your machine may not be set to boot off of anything ot= her > than that one disk though? Is that maybe a BIOS thing? >=20 > I dunno, but I have definitely pulled a primary drive out of the syst= em > completely and booted off the second one, then had linux come up with > (correctly) degraded arrays >=20 > -Mike >=20 > Herta Van den Eynde wrote: >=20 >>(crossposted to linux-raid@vger.kernel.org and redhat-list@redhat.com= ) >>(apologies for this, but this should have be operational last week) >> >>I installed Red Hat EL AS 4 on a HP Proliant DL380, and configured al= l >>system devices in software RAID 1. I added an entry to grub.conf to >>fallback to the second disk in case the first entry fails. At bootti= me, >>booting from hd0 works fine. As does booting from hd1. >> >>Until I physically remove hd0 from the system. >> >>I tried manually installing grub on hd1, >>I added hd1 to the device.map and subsequently re-installed grub on i= t, >>I remapped hd0 to /dev/cciss/c0d1 and subsequently re-installed grub >>all to no avail. >> >>I previously installed this while the devices were in slots 2 and 3. = The >>system wouldn't even boot then. It looks as though booting from sw >>RAID1 will only work when there's a valid device in slot 0. Still >>preferable over hw RAID1, but even better would be if this worked all >>the way. >> >>Is this working for anyone? Any idea what I may have overlooked? An= y >>suggestions on how to debug this? >> >>Kind regards, >> >>Herta >> >>Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm >> >>- >>To unsubscribe from this list: send the line "unsubscribe linux-raid"= in >>the body of a message to majordomo@vger.kernel.org >>More majordomo info at http://vger.kernel.org/majordomo-info.html >=20 > - > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >=20 --=20 Herta Van den Eynde -=3D- Toledo system management K.U. Leuven - Ludit -=3D- phone: +32 (0)16 322 166 -=3D- 50=B051'27" N 004=B040'39" E "Life on Earth may be expensive, but it comes with a free ride around the Sun." Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm - 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