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-rw-r--r--lib/libzfs/libzfs_pool.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index b1ddd983d..9d0366711 100644
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -2753,10 +2753,11 @@ zpool_vdev_attach(zpool_handle_t *zhp,
case EDOM:
/*
- * The new device has a different alignment requirement.
+ * The new device has a different optimal sector size.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "devices have different sector alignment"));
+ "new device has a different optimal sector size; use the "
+ "option '-o ashift=N' to override the optimal size"));
(void) zfs_error(hdl, EZFS_BADDEV, msg);
break;