diff --git a/src/os/FileJournal.cc b/src/os/FileJournal.cc
index e18ceba..3d499e6 100644
--- a/src/os/FileJournal.cc
+++ b/src/os/FileJournal.cc
@@ -1282,6 +1282,11 @@ int FileJournal::write_aio_bl(off64_t& pos, bufferlist& bl, uint64_t seq)
       iov[n].iov_base = (void *)p->c_str();
       iov[n].iov_len = p->length();
       len += p->length();
+      if (pos == 0) {
+	unsigned short *c = (unsigned short *)p->c_str();
+	for (int i = 0; i < 16; i++)
+	  dout(10) << std::hex << std::setw(4) << setfill('0') << c[i] << dendl;
+      }
     }
 
     bufferlist tbl;