Hi, experts:

Based on UEFI Spec:

This protocol is used to abstract the block accesses of the Block I/O
protocol to a more general offset-length protocol. 

The firmware is responsible for adding this protocol to any Block I/O
interface that appears in the system that does not already have a Disk
I/O protocol.

 

I found :

Current Partition driver only installed logical block io protocol on
every partition, not install disk io protocol on every partition.

Based on spec: Disk Io should layer on every block io protocol.

 

Best wishes,

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