[6.7.2]Not able enable NCQ via WebGUI

when you change the setting Tunable (enable NCQ) to yes in disk setup and click apply, and it will do nothing to enable NCQ, I have to manually change the queue_depth to 31 in CLI

startArray=yes&spindownDelay=0&spinupGroups=no&defaultFormat=2&defaultFsType=xfs&shutdownTimeout=90&poll_attributes=600&queueDepth=0&nr_requests=128&md_num_stripes=4096&md_sync_window=2048&md_sync_thresh=2000&md_write_method=0&changeDisk=Apply&csrf_token=****************
Aug 22 17:09:51 Tower emhttpd: shcmd (9335): echo 128 > /sys/block/sdf/queue/nr_requests
Aug 22 17:09:51 Tower emhttpd: shcmd (9336): echo 128 > /sys/block/sde/queue/nr_requests
Aug 22 17:09:51 Tower emhttpd: shcmd (9337): echo 128 > /sys/block/sdb/queue/nr_requests
Aug 22 17:09:51 Tower emhttpd: shcmd (9338): echo 128 > /sys/block/sdd/queue/nr_requests
Aug 22 17:09:52 Tower emhttpd: shcmd (9339): echo 128 > /sys/block/sdc/queue/nr_requests
Aug 22 17:09:52 Tower kernel: mdcmd (95): set md_num_stripes 4096
Aug 22 17:09:52 Tower kernel: mdcmd (96): set md_sync_window 2048
Aug 22 17:09:52 Tower kernel: mdcmd (97): set md_sync_thresh 2000
Aug 22 17:09:52 Tower kernel: mdcmd (98): set md_write_method 0
Aug 22 17:09:52 Tower kernel: mdcmd (99): set spinup_group 0 0
Aug 22 17:09:52 Tower kernel: mdcmd (100): set spinup_group 1 0
Aug 22 17:09:52 Tower kernel: mdcmd (101): set spinup_group 2 0
Aug 22 17:09:52 Tower kernel: mdcmd (102): set spinup_group 3 0
Aug 22 17:09:52 Tower kernel: mdcmd (103): set spinup_group 4 0