diff --git a/sw-block/engine/replication/driver.go b/sw-block/engine/replication/driver.go
index 74508735d..015ce39e1 100644
--- a/sw-block/engine/replication/driver.go
+++ b/sw-block/engine/replication/driver.go
@@ -144,13 +144,23 @@ func (d *RecoveryDriver) PlanRebuild(replicaID string) (*RecoveryPlan, error) {
 	history := d.Storage.GetRetainedHistory()
 	source, snapLSN := history.RebuildSourceDecision()
 
+	// RebuildTargetLSN: the primary's data boundary the replica must reach.
+	// CommittedLSN is the lineage-safe boundary, but during rebuild the replica
+	// is down — sync_all mode reports CommittedLSN=0 because no replica has
+	// confirmed durability. In that case, fall back to HeadLSN (the primary's
+	// actual data extent). The rebuild brings the replica up to the primary's head.
+	rebuildTarget := history.CommittedLSN
+	if rebuildTarget == 0 {
+		rebuildTarget = history.HeadLSN
+	}
+
 	plan := &RecoveryPlan{
 		ReplicaID:          replicaID,
 		SessionID:          sessID,
 		Outcome:            OutcomeNeedsRebuild,
 		RebuildSource:      source,
 		RebuildSnapshotLSN: snapLSN,
-		RebuildTargetLSN:   history.CommittedLSN,
+		RebuildTargetLSN:   rebuildTarget,
 	}
 
 	if source == RebuildSnapshotTail {
diff --git a/weed/server/volume_server_block.go b/weed/server/volume_server_block.go
index 5469de4f0..934786a1c 100644
--- a/weed/server/volume_server_block.go
+++ b/weed/server/volume_server_block.go
@@ -879,14 +879,18 @@ func (bs *BlockService) applyCoreEvent(ev engine.Event) {
 // so the VS log contains a complete trace for post-run diagnosis.
 func (bs *BlockService) coreApplyAndLog(ev engine.Event) engine.ApplyResult {
 	result := bs.v2Core.ApplyEvent(ev)
-	glog.V(0).Infof("core [%s]: event=%T mode=%s pub=%v reason=%q readiness={applied=%v shipper_cfg=%v shipper_conn=%v recv=%v} boundary={durable=%d committed=%d last_barrier_ok=%v last_barrier_reason=%q} cmds=%d",
+	cmdTypes := make([]string, len(result.Commands))
+	for i, cmd := range result.Commands {
+		cmdTypes[i] = fmt.Sprintf("%T", cmd)
+	}
+	glog.V(0).Infof("core [%s]: event=%T mode=%s pub=%v reason=%q readiness={applied=%v shipper_cfg=%v shipper_conn=%v recv=%v} boundary={durable=%d committed=%d last_barrier_ok=%v last_barrier_reason=%q} cmds=%d %v",
 		ev.VolumeID(), ev, result.Projection.Mode.Name,
 		result.Projection.Publication.Healthy, result.Projection.Publication.Reason,
 		result.Projection.Readiness.RoleApplied, result.Projection.Readiness.ShipperConfigured,
 		result.Projection.Readiness.ShipperConnected, result.Projection.Readiness.ReceiverReady,
 		result.Projection.Boundary.DurableLSN, result.Projection.Boundary.CommittedLSN,
 		result.Projection.Boundary.LastBarrierOK, result.Projection.Boundary.LastBarrierReason,
-		len(result.Commands))
+		len(result.Commands), cmdTypes)
 	return result
 }