This is the extract from Teradata documentation for the two tables:
The ResUsageSldv table: Contains resource usage information for system-wide, logical device information. Statistics from this table are collected from the SCSI bus level.
The ResUsageSvdsk table: • Provides AMP-level vdisk logical device statistics. • Includes resource usage logs on cylinder allocation, migration, and I/O statistics. If table logging is enabled on ResUsageSvdsk, the data is written once for each AMP Vproc log period.
Where can I get the log of disk usage that lies in between SLDV and SVDSK?