diff -Naur linux-0.01-rm-1.5/kernel/hd.c linux-0.01-rm-1.6/kernel/hd.c
--- linux-0.01-rm-1.5/kernel/hd.c	2007-11-25 21:42:01.000000000 +0100
+++ linux-0.01-rm-1.6/kernel/hd.c	2007-11-25 21:43:43.000000000 +0100
@@ -256,11 +256,18 @@
 		bad_rw_intr();
 		return;
 	}
-	port_read(HD_DATA,this_request->bh->b_data+
-		512*(this_request->nsector&1),256);
-	this_request->errors = 0;
-	if (--this_request->nsector)
+	
+	if (this_request->nsector==2){
+		this_request->nsector--;
+		port_read(HD_DATA,this_request->bh->b_data,256);
+	}
+	else{
+		port_read(HD_DATA,this_request->bh->b_data+512,256);
 		return;
+	}
+
+	this_request->errors = 0;
+
 	this_request->bh->b_uptodate = 1;
 	this_request->bh->b_dirt = 0;
 	wake_up(&wait_for_request);