Index: uspace/srv/bd/hr/raid0.c
===================================================================
--- uspace/srv/bd/hr/raid0.c	(revision d082801827048a1134fdb37be2c167c9a6991e34)
+++ uspace/srv/bd/hr/raid0.c	(revision 746e636585e0d3bd3069437de2f444739c3aa1a7)
@@ -100,4 +100,7 @@
 }
 
+/*
+ * Called only once in volume's lifetime.
+ */
 errno_t hr_raid0_init(hr_volume_t *vol)
 {
@@ -114,4 +117,10 @@
 	vol->nblocks = total_blkno;
 	vol->bsize = bsize;
+	/*
+	 * XXX: according to bsize set the data_offset...
+	 *
+	 * also can change this depending on level, like
+	 * RAID5 might try to put data at 64K boundary
+	 */
 	vol->data_offset = HR_DATA_OFF;
 	vol->data_blkno = vol->nblocks - (vol->data_offset * vol->extent_no);
Index: uspace/srv/bd/hr/raid1.c
===================================================================
--- uspace/srv/bd/hr/raid1.c	(revision d082801827048a1134fdb37be2c167c9a6991e34)
+++ uspace/srv/bd/hr/raid1.c	(revision 746e636585e0d3bd3069437de2f444739c3aa1a7)
@@ -115,4 +115,7 @@
 }
 
+/*
+ * Called only once in volume's lifetime.
+ */
 errno_t hr_raid1_init(hr_volume_t *vol)
 {
@@ -129,4 +132,10 @@
 	vol->nblocks = total_blkno / vol->extent_no;
 	vol->bsize = bsize;
+	/*
+	 * XXX: according to bsize set the data_offset...
+	 *
+	 * also can change this depending on level, like
+	 * RAID5 might try to put data at 64K boundary
+	 */
 	vol->data_offset = HR_DATA_OFF;
 	vol->data_blkno = vol->nblocks - vol->data_offset;
Index: uspace/srv/bd/hr/raid5.c
===================================================================
--- uspace/srv/bd/hr/raid5.c	(revision d082801827048a1134fdb37be2c167c9a6991e34)
+++ uspace/srv/bd/hr/raid5.c	(revision 746e636585e0d3bd3069437de2f444739c3aa1a7)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2024 Miroslav Cimerman
+ * Copyright (c) 2025 Miroslav Cimerman
  * All rights reserved.
  *
@@ -117,4 +117,7 @@
 }
 
+/*
+ * Called only once in volume's lifetime.
+ */
 errno_t hr_raid5_init(hr_volume_t *vol)
 {
@@ -131,4 +134,10 @@
 	vol->nblocks = total_blkno;
 	vol->bsize = bsize;
+	/*
+	 * XXX: according to bsize set the data_offset...
+	 *
+	 * also can change this depending on level, like
+	 * RAID5 might try to put data at 64K boundary
+	 */
 	vol->data_offset = HR_DATA_OFF;
 	vol->data_blkno = vol->nblocks - (vol->data_offset * vol->extent_no) -