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5.2. Moving root File Systems from a Single Path Device to a Multipath Device‌


This is dramatically simplified by the use of UUIDs to identify devices as an intrinsic label. Simply install multipath-tools-boot and reboot. This will rebuild the initial ramdisk and afford multipath the opportunity to build it's paths before the root file system is mounted by UUID.


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Whenever multipath.conf is updated, so should the initrd by executing update-initramfs -u -k all. The reason being is multipath.conf is copied to the ramdisk and is integral to determining the available devices for grouping via it's blacklist and device sections.


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