diff --git a/kernel/storedev/storedev.c b/kernel/storedev/storedev.c
index 2f2ddf6..cd2073b 100644
--- a/kernel/storedev/storedev.c
+++ b/kernel/storedev/storedev.c
@@ -12,6 +12,7 @@
 #include "hshtb.h"
 #include "hal/hal.h"
 #include "randcrypto/uniqid.h"
+#include "sysdefs/dev.h"
 
 StoreDevList STOREDEV_LIST;
 
@@ -24,6 +25,50 @@ void storedev_init(void) {
   ata_probe();
 }
 
+int32_t storedev_dev_read(Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
+  (void)pid;
+
+  StoreDev *sd = (StoreDev *)dev->extra;
+
+  if (len != sizeof(StoreDevRead)) {
+    return E_INVALIDARGUMENT;
+  }
+
+  StoreDevRead *cfg = (StoreDevRead *)buffer;
+
+  return sd->read(sd, cfg->buffer, cfg->sector, cfg->off, cfg->size);
+}
+
+int32_t storedev_dev_write(Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
+  (void)pid;
+
+  StoreDev *sd = (StoreDev *)dev->extra;
+
+  if (len != sizeof(StoreDevRead)) {
+    return E_INVALIDARGUMENT;
+  }
+
+  StoreDevWrite *cfg = (StoreDevWrite *)buffer;
+
+  return sd->write(sd, cfg->buffer, cfg->sector, cfg->off, cfg->size);
+}
+
+int32_t storedev_dev_seccount(Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
+  (void)pid;
+
+  StoreDev *sd = (StoreDev *)dev->extra;
+
+  return (int32_t)(sd->capacity(sd) / sd->sectorsize);
+}
+
+int32_t storedev_dev_sectsize(Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
+  (void)pid;
+
+  StoreDev *sd = (StoreDev *)dev->extra;
+
+  return (int32_t)sd->sectorsize;
+}
+
 void storedev_register_dev_entry(StoreDev *sd, char *name, int32_t sdtype) {
   spinlock_acquire(&DEVTABLE.spinlock);
   Dev *dev = NULL;
@@ -37,6 +82,11 @@ void storedev_register_dev_entry(StoreDev *sd, char *name, int32_t sdtype) {
 
   spinlock_init(&dev->spinlock);
   dev->extra = (void *)sd;
+
+  dev->fns[DEV_STOREDEV_READ]     = &storedev_dev_read;
+  dev->fns[DEV_STOREDEV_WRITE]    = &storedev_dev_write;
+  dev->fns[DEV_STOREDEV_SECCOUNT] = &storedev_dev_seccount;
+  dev->fns[DEV_STOREDEV_SECTSIZE] = &storedev_dev_sectsize;
 }
 
 void storedev_unregister_dev_entry(Dev *dev) {
diff --git a/share/sysdefs/dev.h b/share/sysdefs/dev.h
index 7351098..06d895c 100644
--- a/share/sysdefs/dev.h
+++ b/share/sysdefs/dev.h
@@ -1,6 +1,9 @@
 #ifndef SHARE_SYSDEFS_DEV_H_
 #define SHARE_SYSDEFS_DEV_H_
 
+#include <stdint.h>
+#include <stddef.h>
+
 #define DEV_TERMDEV_PUTCH 0
 
 #define DEV_PS2KBDEV_READCH     0
@@ -13,6 +16,25 @@
 
 #define DEV_FBDEV_GETINFO 0
 
+#define DEV_STOREDEV_READ       0
+#define DEV_STOREDEV_WRITE      1
+#define DEV_STOREDEV_SECCOUNT   2
+#define DEV_STOREDEV_SECTSIZE   3
+
+typedef struct {
+  uint8_t *const buffer;
+  ptrdiff_t sector;
+  ptrdiff_t off;
+  size_t size;
+} StoreDevRead;
+
+typedef struct {
+  const uint8_t *const buffer;
+  ptrdiff_t sector;
+  ptrdiff_t off;
+  size_t size;
+} StoreDevWrite;
+
 typedef uint64_t Dev_t;
 
 typedef struct {