Recently we are trying to do azure disk encryption on Ubuntu & RedHat and found that a UDEV rule is missing, the new UDEV rule is like following in /etc/udev/rules.d/66-azure-storage.rules

ATTRS{device_id}=="?00000001-0001-*", ENV{fabric_name}="BEK", GOTO="azure_names"

After disk encryption:

• Without this UDEV rule

$ sudo tree /dev/disk/azure
âââ resource -> ../../sdb
âââ resource-part1 -> ../../sdb1
âââ root -> ../../sda
âââ root-part1 -> ../../sda1
âââ scsi1
    âââ lun0 -> ../../../sdd

• With this UDEV rule

$ sudo tree /dev/disk/azure
âââ BEK -> ../../sdc
âââ resource -> ../../sdb
âââ resource-part1 -> ../../sdb1
âââ root -> ../../sda
âââ root-part1 -> ../../sda1
âââ scsi1
    âââ lun0 -> ../../../sdd

All azure os, resource and bek disks should be under /dev/disk/azure directory, that's a rule.
The item BEK -> ../../sdc is very important in kubernetes, without this item, new data disk could not be recognized, details info could be found here: kubernetes/kubernetes#66443 (comment)

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