diff --git a/bin/is b/bin/is
index 84019a10bb3776fb80971a73c1d2f7d4922311ba..9f9cb770502cbf853bc1e8e11b0831615bb95727 100755
--- a/bin/is
+++ b/bin/is
@@ -429,8 +429,10 @@ def arg_parser_init():
                         help="dot not display colored output")
     parser.add_argument("--nice", type=int, default=0,
                         help="nice of the process")
-    parser.add_argument("--ionice", choices=["none","rt", "be","idle"],
+    parser.add_argument("--ionice-class", choices=["none","rt", "be","idle"],
                         help="ionice class of the process (default: none)")
+    parser.add_argument("--ionice-level", type=int, default=None,
+                        help="ionice class level of the process")
     # create a subparser for commands
     subparser = parser.add_subparsers()
     # add command parser
@@ -667,22 +669,22 @@ def main():
         if installsystems.verbosity < 2:
             warnings.filterwarnings("ignore")
         # nice and ionice process
-        if options.nice is not None or options.ionice is not None:
+        if options.nice is not None or options.ionice_class is not None:
             proc = psutil.Process(os.getpid())
             if options.nice is not None:
                 try: proc.nice = options.nice
                 except Exception:
                     warn("Unable to nice process to %s" % options.nice)
-            if options.ionice is not None:
+            if options.ionice_class is not None:
                 try:
                     ioclassmap = {
                         "none": psutil.IOPRIO_CLASS_NONE,
                         "rt": psutil.IOPRIO_CLASS_RT,
                         "be": psutil.IOPRIO_CLASS_BE,
                         "idle": psutil.IOPRIO_CLASS_IDLE}
-                    proc.set_ionice(ioclassmap[options.ionice])
+                    proc.set_ionice(ioclassmap[options.ionice_class], options.ionice_level)
                 except Exception:
-                    warn("Unable to ionice process to %s" % options.ionice)
+                    warn("Unable to ionice process to %s" % options.ionice_class)
         # except for install command we parse all args!
         # install command is responsible of parsing
         if options.func is not c_install:
diff --git a/installsystems/config.py b/installsystems/config.py
index 971576b287bff595503c3fdb4bda85138d6ec308..0babb4cc115307b36c50dab71c286142e8134a78 100644
--- a/installsystems/config.py
+++ b/installsystems/config.py
@@ -62,7 +62,8 @@ class MainConfigFile(ConfigFile):
         "repo_filter": str,
         "repo_config": str,
         "nice": int,
-        "ionice": ["none", "rt", "be", "idle"]
+        "ionice_class": ["none", "rt", "be", "idle"],
+        "ionice_level": int
         }
     def __init__(self, filename, prefix=os.path.basename(sys.argv[0])):
         self.prefix = prefix
diff --git a/samples/installsystems.conf b/samples/installsystems.conf
index 8e8cd902b99a1e9bb64005b48415aadc00273aac..f2cd34d6abebc2a2bf2768c9a2343aa557908a4f 100644
--- a/samples/installsystems.conf
+++ b/samples/installsystems.conf
@@ -5,11 +5,14 @@
 # Set verbosity (0: quiet, 1: normal, 2: debug)
 #verbosity = 2
 
-# Set nice process value
+# Set nice process value (see nice (1))
 #nice = 0
 
-# Set ionice class
-#ionice = idle
+# Set ionice class (see ionice (1))
+#ionice_class = idle
+
+# Set ionice class data level (see ionice (1))
+#ionice_level = 0
 
 # define a custom cache directory
 #cache = /tmp/sex