From: Phil Turmel <philip@turmel.org>
To: "G, Sushma" <Sushma.G@lsi.com>
Cc: "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: Boot from degraded MD array
Date: Thu, 18 Nov 2010 12:39:55 -0500 [thread overview]
Message-ID: <4CE564EB.8080507@turmel.org> (raw)
In-Reply-To: <9181E99F41C081478B455A70FC1D01CB0A4C3E6B@inbmail01.lsi.com>
On 11/18/2010 10:25 AM, G, Sushma wrote:
> Hi,
>
> I wanted to know if there is a way to activate a degraded array be default.
>
> In a scenario where OS is installed on a MD R1 array, with no spares configured, if a physical drive fails is there a way to still boot in to OS, without having to configure a hot spare?
> Also, is R5 different in any way, in the same scenario mentioned above ( R5 in degraded mode)?"
>
> Setup:
> Create a R1 using 2 sata disks, using mdadm with SLES 11 SP1 Operating system.
> Once OS is installed, shut down the system and fail a drive. now try to boot up the OS.
>
> OS boot fails because the RAID is inactive as the VD is degraded.
Look at the kernel command line options for MD, particularly "md-mod.start_dirty_degraded".
HTH,
Phil
next prev parent reply other threads:[~2010-11-18 17:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-18 15:25 Boot from degraded MD array G, Sushma
2010-11-18 17:39 ` Phil Turmel [this message]
2010-11-22 4:13 ` Neil Brown
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