diff --git a/wally/suits/io/rrd_raw.cfg b/wally/suits/io/rrd_raw.cfg
index e7ca82d..935b100 100644
--- a/wally/suits/io/rrd_raw.cfg
+++ b/wally/suits/io/rrd_raw.cfg
@@ -1,6 +1,6 @@
 [test]
-blocksize=4m
-rw=write
+blocksize=4k
+rw=randwrite
 iodepth=1
 ramp_time=0
 runtime=120
@@ -17,8 +17,8 @@
 wait_for_previous=1
 per_job_logs=0
 randrepeat=0
-filename=/media/data/test.db
-size=50G
+filename=/dev/rbd0
+size=1G
 ;verify_pattern=0x00
 buffer_compress_percentage=99
 write_bw_log=/tmp/bw.non-compress.log