Reference Guide

Chapter 4 SCSI Commands
REPORT LUNS Command (A0h)
DLT-S4 Interface Reference Guide 294
The LUN List Length field contains the length in bytes of the LUN list
that can be transferred. The LUN list length equals the number of logical
unit numbers reported multiplied by 8. If the allocation length in the CDB
is too small to allow transfer of information about all of the logical units
configured, the LUN list length value is not adjusted to reflect the
truncation.