diff --git a/ZFS-on-Linux-Module-Parameters.md b/ZFS-on-Linux-Module-Parameters.md
index 61faf71..0d0b0d0 100644
--- a/ZFS-on-Linux-Module-Parameters.md
+++ b/ZFS-on-Linux-Module-Parameters.md
@@ -695,7 +695,7 @@ Disables writing prefetched, but unused, buffers to cache devices.
 | l2arc_noprefetch | Notes
 |---|---
 | Tags | [ARC](#arc), [L2ARC](#l2arc), [prefetch](#prefetch)
-| When to change | Setting to 0 can increase L2ARC hit rates for workloads where the ARC is too small for a read workload that benefits from prefetching.
+| When to change | Setting to 0 can increase L2ARC hit rates for workloads where the ARC is too small for a read workload that benefits from prefetching. Also, if the main pool devices are very slow, setting to 0 can improve some workloads such as backups.
 | Data Type | boolean
 | Range | 0=write prefetched but unused buffers to cache devices, 1=do not write prefetched but unused buffers to cache devices
 | Default | 1