diff --git a/src/os/FileJournal.cc b/src/os/FileJournal.cc
index e18ceba..6c25458 100644
--- a/src/os/FileJournal.cc
+++ b/src/os/FileJournal.cc
@@ -651,6 +651,9 @@ int FileJournal::read_header()
   bp.zero();
   int r = ::pread(fd, bp.c_str(), bp.length(), 0);
   bl.push_back(bp);
+  
+  unsigned int *p = (unsigned int *)bp.c_str();
+  dout(10) << __func__ << "count=0x" << std::hex << p[0] << " ,0x=" << std::hex << p[1] << dendl;
 
   try {
     bufferlist::iterator p = bl.begin();
@@ -695,6 +698,9 @@ bufferptr FileJournal::prepare_header()
   bufferptr bp = buffer::create_page_aligned(get_top());
   bp.zero();
   memcpy(bp.c_str(), bl.c_str(), bl.length());
+  unsigned int *p = (unsigned int *)bp.c_str();
+  dout(10) << __func__ << " ptr= " << std::hex << p << dendl;
+  dout(10) << __func__ << " content=0x" << std::hex << p[0] << " ,0x=" << std::hex << p[1] << dendl;
   return bp;
 }
 
@@ -1282,6 +1288,9 @@ 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();
+      unsigned int *p1 = (unsigned int *)p->c_str();
+      dout(10) << __func__  << " ptr= " << std::hex << p1 << dendl;
+      dout(10) << __func__ << " content=0x" << std::hex << p1[0] << " ,0x=" << std::hex << p1[1] << dendl;
     }
 
     bufferlist tbl;
@@ -1302,6 +1311,10 @@ int FileJournal::write_aio_bl(off64_t& pos, bufferlist& bl, uint64_t seq)
     iocb *piocb = &aio.iocb;
     int attempts = 10;
     do {
+      unsigned int *p = (unsigned int *)iov[0].iov_base;
+      dout(10) << __func__ << " ptr= " << std::hex << p << dendl;
+      dout(10) << __func__ << " content=0x" << std::hex << p[0] << " ,0x=" << std::hex << p[1] << dendl;
+
       int r = io_submit(aio_ctx, 1, &piocb);
       if (r < 0) {
 	derr << "io_submit to " << aio.off << "~" << aio.len
@@ -1360,6 +1373,9 @@ void FileJournal::write_finish_thread_entry()
 	dout(10) << "write_finish_thread_entry aio " << ai->off
 		 << "~" << ai->len << " done" << dendl;
 	ai->done = true;
+	unsigned int *p = (unsigned int *)ai->iov[0].iov_base;
+	dout(10) << __func__  << " ptr= " << std::hex << p << dendl;
+      dout(10) << __func__ << " content=0x" << std::hex << p[0] << " ,0x=" << std::hex << p[1] << dendl;
       }
       check_aio_completion();
     }