diff --git a/kernel/device/storage/idedrv.c b/kernel/device/storage/idedrv.c
index 958390b..cad9ce2 100644
--- a/kernel/device/storage/idedrv.c
+++ b/kernel/device/storage/idedrv.c
@@ -286,6 +286,9 @@ DEFINE_DEVICE_OP (idedrv_read) {
   if (sector + sector_count > idedrv->sector_count)
     return -ST_OOB_ERROR;
 
+  if (idedrv->current_req != NULL)
+    return -ST_TRY_AGAIN;
+
   if (!ide_wait (idedrv->io, 100000, false, false))
     return -ST_XDRV_READ_ERROR;
 
@@ -347,6 +350,9 @@ DEFINE_DEVICE_OP (idedrv_write) {
   if (sector + sector_count > idedrv->sector_count)
     return -ST_OOB_ERROR;
 
+  if (idedrv->current_req != NULL)
+    return -ST_TRY_AGAIN;
+
   if (!ide_wait (idedrv->io, 100000, false, false))
     return -ST_XDRV_WRITE_ERROR;