From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Ns06r-0008DL-TD for garchives@archives.gentoo.org; Wed, 17 Mar 2010 20:44:58 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 6DDBFE0998; Wed, 17 Mar 2010 20:44:39 +0000 (UTC) Received: from out3.smtp.messagingengine.com (out3.smtp.messagingengine.com [66.111.4.27]) by pigeon.gentoo.org (Postfix) with ESMTP id 5AA17E0998 for ; Wed, 17 Mar 2010 20:44:39 +0000 (UTC) Received: from compute2.internal (compute2.internal [10.202.2.42]) by gateway1.messagingengine.com (Postfix) with ESMTP id 3CC67E6560; Wed, 17 Mar 2010 16:44:39 -0400 (EDT) Received: from heartbeat1.messagingengine.com ([10.202.2.160]) by compute2.internal (MEProxy); Wed, 17 Mar 2010 16:44:39 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=messagingengine.com; h=message-id:date:from:reply-to:mime-version:to:subject:references:in-reply-to:content-type; s=smtpout; bh=nvvZq1wqubZBBt2u2UIqnGj/Jys=; b=NkErgvHRzqFchBahFRoB2DzY1oxxTn38UD5D7Kp6oTgM89OF6zk90rFvRa2J9OWJs9BCkZvCHWKUD24XaXkzKUGNAK1kHUvHaqlXMtbta1FpZis5rzUnrKr+wEcB5ZegDfzG7IBFks2oBvwDoXafu+P9/HrJSMSjqroO8JLydsk= X-Sasl-enc: 7Y/YBhIF3jDwiGQ/IYk5F9HVMwSPqTWPu4jKoJYEzAWp 1268858678 Received: from [192.168.5.10] (lvps83-169-5-6.dedicated.hosteurope.de [83.169.5.6]) by mail.messagingengine.com (Postfix) with ESMTPSA id A4EDB4B1508 for ; Wed, 17 Mar 2010 16:44:37 -0400 (EDT) Message-ID: <4BA13F32.9010207@f_philipp.fastmail.net> Date: Wed, 17 Mar 2010 21:44:34 +0100 From: Florian Philipp User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100313 Lightning/1.0b2pre Thunderbird/3.0.3 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: Strategy for using SAN/NAS for storage with Gentoo... References: <4B9E343A.4040908@shic.co.uk> <87d3z53b2u.fsf@newsguy.com> <854dca5c1003150849l16b375ddl89ad2e20a8f6a135@mail.gmail.com> <4B9E5FA4.1040501@shic.co.uk> <7D7A990E-4680-472D-8408-FFABFE82EDBA@stellar.eclipse.co.uk> <4B9E87FA.3090600@shic.co.uk> <4B9EB4B6.9040106@alyf.net> <4B9FB29D.7010902@shic.co.uk> <25EC8AD5-9178-4556-AB64-6069AAB40845@stellar.eclipse.co.uk> <20100316200433.02dc667a@digimed.co.uk> <035445D6-FEB8-42C2-B8DB-C57F8CFACD31@stellar.eclipse.co.uk> <20100316212626.17152fc4@digimed.co.uk> In-Reply-To: <20100316212626.17152fc4@digimed.co.uk> X-Enigmail-Version: 1.0.1 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig3B659DBC8E8079E573E7FC57" X-Archives-Salt: fcc4e364-9ab3-4ba4-9ce9-636bee4f2cfe X-Archives-Hash: fdb3cdb4ce2606abd67add1c123cc05f This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig3B659DBC8E8079E573E7FC57 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Am 16.03.2010 22:26, schrieb Neil Bothwick: > On Tue, 16 Mar 2010 20:13:29 +0000, Stroller wrote: >=20 >>>> How does your system boot if your RAID1 system volume fails? =20 >>> >>> You put GRUB on both disks, then you can boot from either on its >>> own. =20 >> >> Is this reliable? I don't contest it, I'm just asking. It's just this = =20 >> was one of my considerations when choosing hardware RAID. >=20 > Yes it is, if sda fails unplug it and sdb becomes sda (or hd1 becomes > hd0 in GRUB terms) and the boot continues. Because RAID1 puts the RAID > superblock in a different location from the ordinary one, you can use > either disk from a RAID1 array as a single disk. >=20 >=20 Just for clarification: Is it really necessary to unplug the broken disk for this to work? If read access fails on sda and the BIOS tries sdb, would this also work? Isn't grub's hd0 always the disk on which grub resides (e.g. the disk from which grub managed to boot)? Thanks in advance! Florian Philipp --------------enig3B659DBC8E8079E573E7FC57 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkuhPzIACgkQqs4uOUlOuU8shACeJpxrXSCfAEGv50BNcBryfd6E xV8An1rsK/wB8NjfF9nm23tTvo2yragf =KIH/ -----END PGP SIGNATURE----- --------------enig3B659DBC8E8079E573E7FC57--