Index: sys/boot/i386/common/drv.c
===================================================================
--- sys/boot/i386/common/drv.c	(revision 234685)
+++ sys/boot/i386/common/drv.c	(working copy)
@@ -60,9 +60,11 @@
 drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk)
 {
 	static unsigned c = 0x2d5c7c2f;
+	int retries = 3;
 
 	if (!OPT_CHECK(RBX_QUIET))
 		printf("%c\b", c = c << 8 | c >> 24);
+retry:
 #ifndef USE_XREAD
 	packet.len = sizeof(struct edd_packet);
 	packet.count = nblk;
@@ -86,6 +88,10 @@
 #endif	/* USE_XREAD */
 	v86int();
 	if (V86_CY(v86.efl)) {
+		if (v86.eax >> 8 & 0xff == 0x80) {
+			if (--retries > 0)
+				goto retry;
+		}
 		printf("%s: error %u lba %u\n",
 		    BOOTPROG, v86.eax >> 8 & 0xff, lba);
 		return (-1);