Re: [Xen-users] XCP Booting from SAN

[John Madden <jmadden@xxxxxxxxxxx>]

> 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 install 
the proper multipath driver (appropriate to your SAN) into your initrd. 
 The i/o errors are coming from the inactive path on an active/passive 
array.  For example, with our IBM DS-4800 array, we had to add the 
scsi_dh_rdac driver to the initrd so it was available to the multipath 
stuff 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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