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Xen domainU fails to boot with a "Xen Guest OS Fails to Boot with Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" error message

47 bytes added, 21:13, 28 March 2009

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In the above output we can see that the kernel file is named vmlinuz-2.6.18-53.1.14.el5xen, while the corresponding RAM Disk is called initrd-2.6.18-53.1.14.el5xen.img. To ~~specifiy~~ specify this file in our Xen configuration file we need to add the a ramdisk line as follows:

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Unfortunately, using the system supplied RAM Disk can sometimes lead to boot problems ~~assocated~~ associated with conflicts with SCSI drivers. Another, and better option is to create a new RAM Disk file that does not contain SCSI modules and then reference this file in the Xen configuration file:

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mkinitrd --omit-scsi-modules --with=xennet --with=xenblk --preload=xenblk initrd-$(uname -r).img $(uname -r)

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[[Category:Virtualization Problem Solutions]]