diff --git a/sys/dev/ata/ata-all.c b/sys/dev/ata/ata-all.c
index c48cca9b6ffa..9d378796932a 100644
--- a/sys/dev/ata/ata-all.c
+++ b/sys/dev/ata/ata-all.c
@@ -1244,7 +1244,10 @@ ata_reset(struct ata_softc *scp, int32_t *mask)
 	if (*mask == 0x03)      /* wait for both master & slave */
 	    if (!(status0 & ATA_S_BUSY) && !(status1 & ATA_S_BUSY))
 		break;
-	DELAY(100);
+	if (ata_delayed_attach)
+	    DELAY(100);
+	else
+	    tsleep(ata_delayed_attach, PRIBIO, "atarst", 1);
     }	
     DELAY(1);
     outb(scp->altioaddr, ATA_A_4BIT);