-# Increase default MD raid5/raid6 strip cache
-ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", ENV{MD_LEVEL}=="raid5", ATTR{md/stripe_cache_size}="8192"
-ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", ENV{MD_LEVEL}=="raid6", ATTR{md/stripe_cache_size}="8192"
+# Increase default MD raid5/raid6 strip cache + group_thread_cnt
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", ENV{MD_LEVEL}=="raid5", ATTR{md/stripe_cache_size}="8192", ATTR{md/group_thread_cnt}="4"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", ENV{MD_LEVEL}=="raid6", ATTR{md/stripe_cache_size}="8192", ATTR{md/group_thread_cnt}="4"