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Re: [Xen-users] XCP Booting from SAN

from [John Madden]

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To:	Martin Smith <u571kills@xxxxxxxxx>
Subject:	Re: [Xen-users] XCP Booting from SAN
From:	John Madden <jmadden@xxxxxxxxxxx>
Date:	Tue, 12 Jul 2011 16:20:49 -0400
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One last clarification. The servers still boot, they just take 30
minutes to do so. While they are trying to boot tons of /dev/sd* errors
scroll by on the screen. After the machine finishes booting the I/O
errors appear to stop.

What model SAN is it? I've seen this before and the fix is to installthe proper multipath driver (appropriate to your SAN) into your initrd.The i/o errors are coming from the inactive path on an active/passivearray. For example, with our IBM DS-4800 array, we had to add thescsi_dh_rdac driver to the initrd so it was available to the multipathstuff that was happening at boot.


John




--
John Madden
Sr UNIX Systems Engineer / Office of Technology
Ivy Tech Community College of Indiana
jmadden@xxxxxxxxxxx

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