diff --git a/demo-db/icebug-disk/demo_indices_follows.parquet b/demo-db/icebug-disk/demo_indices_follows.parquet
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diff --git a/demo-db/icebug-disk/demo_indices_livesin.parquet b/demo-db/icebug-disk/demo_indices_livesin.parquet
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diff --git a/demo-db/icebug-disk/demo_indptr_follows.parquet b/demo-db/icebug-disk/demo_indptr_follows.parquet
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diff --git a/demo-db/icebug-disk/demo_indptr_livesin.parquet b/demo-db/icebug-disk/demo_indptr_livesin.parquet
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diff --git a/demo-db/icebug-disk/demo_mapping_city.parquet b/demo-db/icebug-disk/demo_mapping_city.parquet
deleted file mode 100644
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diff --git a/demo-db/icebug-disk/demo_mapping_user.parquet b/demo-db/icebug-disk/demo_mapping_user.parquet
deleted file mode 100644
index ba50691..0000000
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diff --git a/demo-db/icebug-disk/demo_metadata.parquet b/demo-db/icebug-disk/demo_metadata.parquet
deleted file mode 100644
index 4cf5955..0000000
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diff --git a/demo-db/icebug-disk/demo_nodes_city.parquet b/demo-db/icebug-disk/demo_nodes_city.parquet
deleted file mode 100644
index 86fa9cb..0000000
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diff --git a/demo-db/icebug-disk/demo_nodes_user.parquet b/demo-db/icebug-disk/demo_nodes_user.parquet
deleted file mode 100644
index 8f89fad..0000000
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diff --git a/demo-db/icebug-disk/indices_follows.parquet b/demo-db/icebug-disk/indices_follows.parquet
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index 0000000..23edc18
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diff --git a/demo-db/icebug-disk/indices_livesin.parquet b/demo-db/icebug-disk/indices_livesin.parquet
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index 0000000..6b5ef74
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diff --git a/demo-db/icebug-disk/indptr_follows.parquet b/demo-db/icebug-disk/indptr_follows.parquet
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index 0000000..763d270
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diff --git a/demo-db/icebug-disk/indptr_livesin.parquet b/demo-db/icebug-disk/indptr_livesin.parquet
new file mode 100644
index 0000000..3721c92
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diff --git a/demo-db/icebug-disk/nodes_city.parquet b/demo-db/icebug-disk/nodes_city.parquet
new file mode 100644
index 0000000..c7aa19b
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diff --git a/demo-db/icebug-disk/nodes_user.parquet b/demo-db/icebug-disk/nodes_user.parquet
new file mode 100644
index 0000000..ba1d18e
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diff --git a/demo-db/icebug-disk/schema.cypher b/demo-db/icebug-disk/schema.cypher
index ef2b68a..646c1af 100644
--- a/demo-db/icebug-disk/schema.cypher
+++ b/demo-db/icebug-disk/schema.cypher
@@ -1,4 +1,4 @@
-CREATE NODE TABLE city(id INT32, name STRING, population INT64, PRIMARY KEY(id)) WITH (storage = 'demo');
-CREATE NODE TABLE user(id INT32, name STRING, age INT64, PRIMARY KEY(id)) WITH (storage = 'demo');
-CREATE REL TABLE follows(FROM user TO user, since INT32) WITH (storage = 'demo');
-CREATE REL TABLE livesin(FROM user TO city) WITH (storage = 'demo');
+CREATE NODE TABLE city(id INT32, name STRING, population INT64, PRIMARY KEY(id)) WITH (storage = 'icebug-disk');
+CREATE NODE TABLE user(id INT32, name STRING, age INT64, PRIMARY KEY(id)) WITH (storage = 'icebug-disk');
+CREATE REL TABLE follows(FROM user TO user, since INT32) WITH (storage = 'icebug-disk');
+CREATE REL TABLE livesin(FROM user TO city) WITH (storage = 'icebug-disk');
diff --git a/ice-disk-test/fixtures/nodes_notparquet.parquet b/ice-disk-test/fixtures/nodes_notparquet.parquet
new file mode 100644
index 0000000..abbffff
--- /dev/null
+++ b/ice-disk-test/fixtures/nodes_notparquet.parquet
@@ -0,0 +1 @@
+this is not a parquet file
diff --git a/ice-disk-test/fixtures/nodes_noversion.parquet b/ice-disk-test/fixtures/nodes_noversion.parquet
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index 0000000..a5e7cc7
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diff --git a/ice-disk-test/fixtures/nodes_upperversion.parquet b/ice-disk-test/fixtures/nodes_upperversion.parquet
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index 0000000..eb89f01
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diff --git a/ice-disk-test/fixtures/nodes_wrongversion.parquet b/ice-disk-test/fixtures/nodes_wrongversion.parquet
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index 0000000..0e7b6ae
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