FM / queue

/sys/devices/virtual/block/loop14/queue

Name	Size	Mode	Actions
add_random	4096	0644	edit dl rm
chunk_sectors	4096	0444	edit dl rm
dax	4096	0444	edit dl rm
discard_granularity	4096	0444	edit dl rm
discard_max_bytes	4096	0644	edit dl rm
discard_max_hw_bytes	4096	0444	edit dl rm
discard_zeroes_data	4096	0444	edit dl rm
fua	4096	0444	edit dl rm
hw_sector_size	4096	0444	edit dl rm
iostats	4096	0644	edit dl rm
io_poll	4096	0644	edit dl rm
io_poll_delay	4096	0644	edit dl rm
logical_block_size	4096	0444	edit dl rm
max_discard_segments	4096	0444	edit dl rm
max_hw_sectors_kb	4096	0444	edit dl rm
max_integrity_segments	4096	0444	edit dl rm
max_sectors_kb	4096	0644	edit dl rm
max_segments	4096	0444	edit dl rm
max_segment_size	4096	0444	edit dl rm
minimum_io_size	4096	0444	edit dl rm
nomerges	4096	0644	edit dl rm
nr_requests	4096	0644	edit dl rm
nr_zones	4096	0444	edit dl rm
optimal_io_size	4096	0444	edit dl rm
physical_block_size	4096	0444	edit dl rm
read_ahead_kb	4096	0644	edit dl rm
rotational	4096	0644	edit dl rm
rq_affinity	4096	0644	edit dl rm
scheduler	4096	0644	edit dl rm
stable_writes	4096	0644	edit dl rm
virt_boundary_mask	4096	0444	edit dl rm
wbt_lat_usec	4096	0644	edit dl rm
write_cache	4096	0644	edit dl rm
write_same_max_bytes	4096	0444	edit dl rm
write_zeroes_max_bytes	4096	0444	edit dl rm
zoned	4096	0444	edit dl rm
zone_append_max_bytes	4096	0444	edit dl rm
zone_write_granularity	4096	0444	edit dl rm

Edit: /sys/devices/virtual/block/loop14/queue/add_random (4096B)