Report LUNs (A0h)
Report LUNS (A0h) returns the known LUNs to which the initiator can send commands.
- Select Report
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00h = The library returns LUN addresses limited to the LUN addressing method, peripheral device addressing method, and the flat space addressing method.
02h = The library returns all LUNs accessible to the initiator.
- Allocation Length
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The number of bytes allocated for data to be returned from the Report LUNs command.
The Allocation must be at least 16 bytes. If it is less, the library returns a check condition with the sense key set to "illegal request" and the additional sense data set to "invalid field" in the command descriptor block (CDB).
Report LUNs Data
- LUN List Length
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The library returns the length in bytes of the LUN list available for transfer. It is equal to 8 times the number of available logical units for the initiator.
For example: If the allocation length is 16 bytes and 2 logical units are available, this command will return the 8-byte header and 1 logical unit descriptor; however, the LUN list length will still be 16 because 16 bytes were available if the allocation length was sufficient.
- Address Method
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00b = The library is using single level LUN addressing
- Bus ID
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0h = There is a logical unit at the current level
- Single Level LUN Address
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The value of the LUN.
- Second, Third, and Fourth Level LUN Address
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00h = The library only uses single level addressing.