diff --git a/pkg/operator/ceph/cluster/osd/config/config_test.go b/pkg/operator/ceph/cluster/osd/config/config_test.go
new file mode 100644
index 000000000..08769d641
--- /dev/null
+++ b/pkg/operator/ceph/cluster/osd/config/config_test.go
@@ -0,0 +1,127 @@
+/*
+Copyright 2026 The Rook Authors. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestConvertToIntIgnoreErr(t *testing.T) {
+	assert.Equal(t, 0, convertToIntIgnoreErr(""))
+	assert.Equal(t, 0, convertToIntIgnoreErr("abc"))
+	assert.Equal(t, 0, convertToIntIgnoreErr("1.5"))
+	assert.Equal(t, 0, convertToIntIgnoreErr("0"))
+	assert.Equal(t, 1, convertToIntIgnoreErr("1"))
+	assert.Equal(t, -1, convertToIntIgnoreErr("-1"))
+	assert.Equal(t, 1024, convertToIntIgnoreErr("1024"))
+}
+
+func TestToStoreConfig(t *testing.T) {
+	t.Run("empty config returns defaults", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{})
+		assert.Equal(t, 1, cfg.OSDsPerDevice)
+		assert.Equal(t, 0, cfg.WalSizeMB)
+		assert.Equal(t, 0, cfg.DatabaseSizeMB)
+		assert.Equal(t, false, cfg.EncryptedDevice)
+		assert.Equal(t, "", cfg.MetadataDevice)
+	})
+
+	t.Run("all valid fields", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{
+			WalSizeMBKey:       "512",
+			DatabaseSizeMBKey:  "1024",
+			OSDsPerDeviceKey:   "3",
+			EncryptedDeviceKey: "true",
+			MetadataDeviceKey:  "sdb",
+			DeviceClassKey:     "ssd",
+			InitialWeightKey:   "1.5",
+			PrimaryAffinityKey: "0.5",
+		})
+		assert.Equal(t, 512, cfg.WalSizeMB)
+		assert.Equal(t, 1024, cfg.DatabaseSizeMB)
+		assert.Equal(t, 3, cfg.OSDsPerDevice)
+		assert.Equal(t, true, cfg.EncryptedDevice)
+		assert.Equal(t, "sdb", cfg.MetadataDevice)
+		assert.Equal(t, "ssd", cfg.DeviceClass)
+		assert.Equal(t, "1.5", cfg.InitialWeight)
+		assert.Equal(t, "0.5", cfg.PrimaryAffinity)
+	})
+
+	t.Run("OSDsPerDevice invalid input becomes 1", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{
+			OSDsPerDeviceKey: "0",
+		})
+		assert.Equal(t, 1, cfg.OSDsPerDevice)
+
+		cfg = ToStoreConfig(map[string]string{
+			OSDsPerDeviceKey: "-5",
+		})
+		assert.Equal(t, 1, cfg.OSDsPerDevice)
+
+		cfg = ToStoreConfig(map[string]string{
+			OSDsPerDeviceKey: "not-a-number",
+		})
+		assert.Equal(t, 1, cfg.OSDsPerDevice)
+	})
+
+	t.Run("walSizeMB non-numeric becomes 0, negative passes through", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{
+			WalSizeMBKey: "not-a-number",
+		})
+		assert.Equal(t, 0, cfg.WalSizeMB)
+
+		cfg = ToStoreConfig(map[string]string{
+			WalSizeMBKey: "-5",
+		})
+		assert.Equal(t, -5, cfg.WalSizeMB)
+	})
+
+	t.Run("encrypted device requires exact string 'true'", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{
+			EncryptedDeviceKey: "TRUE",
+		})
+		assert.Equal(t, false, cfg.EncryptedDevice)
+
+		cfg = ToStoreConfig(map[string]string{
+			EncryptedDeviceKey: "1",
+		})
+		assert.Equal(t, false, cfg.EncryptedDevice)
+	})
+
+	t.Run("unknown keys are ignored", func(t *testing.T) {
+		cfg := ToStoreConfig(map[string]string{
+			"unknownKey": "value",
+		})
+		assert.Equal(t, 1, cfg.OSDsPerDevice)
+		assert.Equal(t, 0, cfg.WalSizeMB)
+		assert.Equal(t, 0, cfg.DatabaseSizeMB)
+		assert.Equal(t, false, cfg.EncryptedDevice)
+		assert.Equal(t, "", cfg.MetadataDevice)
+		assert.Equal(t, "", cfg.DeviceClass)
+		assert.Equal(t, "", cfg.InitialWeight)
+		assert.Equal(t, "", cfg.PrimaryAffinity)
+		assert.Equal(t, "", cfg.StoreType)
+	})
+}
+
+func TestMetadataDevice(t *testing.T) {
+	assert.Equal(t, "sdb", MetadataDevice(map[string]string{MetadataDeviceKey: "sdb"}))
+	assert.Equal(t, "", MetadataDevice(map[string]string{"other": "value"}))
+	assert.Equal(t, "", MetadataDevice(map[string]string{}))
+}