I/O Indicators ( last 24 hours)
The average read latency is fine, but the maximum read latency of 237 ms is very high. This means there were periods of severe I/O slowdown. 
Write performance looks stable (both throughput and latency are good). 
The issue is likely intermittent read I/O bottlenecks, possibly due to: 
 
Background operations ( backups, reorganizations, or large queries).causing spikes. 
 
SAP Note 1999930 for HANA I/O analysis 