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-rw-r--r--cmd/zhack/zhack.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/cmd/zhack/zhack.c b/cmd/zhack/zhack.c
index 10dd8642e..32d29fd44 100644
--- a/cmd/zhack/zhack.c
+++ b/cmd/zhack/zhack.c
@@ -357,8 +357,10 @@ zhack_do_feature_enable(int argc, char **argv)
zhack_spa_open(target, B_FALSE, FTAG, &spa);
mos = spa->spa_meta_objset;
- if (zfeature_is_supported(feature.fi_guid))
- fatal(spa, FTAG, "'%s' is a real feature, will not enable");
+ if (zfeature_is_supported(feature.fi_guid) && (g_force == B_FALSE))
+ fatal(spa, FTAG,
+ "'%s' is a real feature, will not enable\n"
+ "provide the -f option to force override", feature.fi_guid);
if (0 == zap_contains(mos, spa->spa_feat_desc_obj, feature.fi_guid))
fatal(spa, FTAG, "feature already enabled: %s",
feature.fi_guid);