--- a/usr/src/uts/common/fs/zfs/vdev_disk.c	Wed Apr 21 20:49:07 2010 -0600
+++ b/usr/src/uts/common/fs/zfs/vdev_disk.c	Thu Apr 22 11:12:41 2010 +0800
@@ -19,8 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #include <sys/zfs_context.h>
@@ -108,7 +107,7 @@
 {
 	spa_t *spa = vd->vdev_spa;
 	vdev_disk_t *dvd;
-	struct dk_minfo dkm;
+	struct dk_minfo_ext dkmext;
 	int error;
 	dev_t dev;
 	int otyp;
@@ -288,11 +287,11 @@
 	 * Determine the device's minimum transfer size.
 	 * If the ioctl isn't supported, assume DEV_BSIZE.
 	 */
-	if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO, (intptr_t)&dkm,
+	if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
 	    FKIOCTL, kcred, NULL) != 0)
-		dkm.dki_lbsize = DEV_BSIZE;
+		dkmext.dki_pbsize = DEV_BSIZE;
 
-	*ashift = highbit(MAX(dkm.dki_lbsize, SPA_MINBLOCKSIZE)) - 1;
+	*ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
 
 	/*
 	 * Clear the nowritecache bit, so that on a vdev_reopen() we will