diff --git a/blockstore_flush.cpp b/blockstore_flush.cpp
index 74aea623..63da35d0 100644
--- a/blockstore_flush.cpp
+++ b/blockstore_flush.cpp
@@ -231,7 +231,7 @@ resume_0:
                             dirty_end->second.journal_sector < bs->journal.used_start))
                         {
 #ifdef BLOCKSTORE_DEBUG
-                            printf("Write %lu:%lu v%lu is too new: offset=%08lx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
+                            printf("Write %lx:%lx v%lu is too new: offset=%08lx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
 #endif
                             flusher->enqueue_flush(cur);
                         }
@@ -257,7 +257,7 @@ resume_0:
         if (repeat_it != flusher->sync_to_repeat.end())
         {
 #ifdef BLOCKSTORE_DEBUG
-            printf("Postpone %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
+            printf("Postpone %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
 #endif
             // We don't flush different parts of history of the same object in parallel
             // So we check if someone is already flushing this object
@@ -271,7 +271,7 @@ resume_0:
         else
             flusher->sync_to_repeat[cur.oid] = 0;
 #ifdef BLOCKSTORE_DEBUG
-        printf("Flushing %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
+        printf("Flushing %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
 #endif
         flusher->active_flushers++;
 resume_1:
@@ -299,7 +299,7 @@ resume_1:
                 // Object not allocated. This is a bug.
                 char err[1024];
                 snprintf(
-                    err, 1024, "BUG: Object %lu:%lu v%lu that we are trying to flush is not allocated on the data device",
+                    err, 1024, "BUG: Object %lx:%lx v%lu that we are trying to flush is not allocated on the data device",
                     cur.oid.inode, cur.oid.stripe, cur.version
                 );
                 throw std::runtime_error(err);
@@ -497,7 +497,7 @@ resume_1:
         }
         // All done
 #ifdef BLOCKSTORE_DEBUG
-        printf("Flushed %lu:%lu v%lu (%ld left)\n", cur.oid.inode, cur.oid.stripe, cur.version, flusher->flush_queue.size());
+        printf("Flushed %lx:%lx v%lu (%ld left)\n", cur.oid.inode, cur.oid.stripe, cur.version, flusher->flush_queue.size());
 #endif
         flusher->active_flushers--;
         repeat_it = flusher->sync_to_repeat.find(cur.oid);
@@ -593,7 +593,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
         {
             char err[1024];
             snprintf(
-                err, 1024, "BUG: Unexpected dirty_entry %lu:%lu v%lu state during flush: %d",
+                err, 1024, "BUG: Unexpected dirty_entry %lx:%lx v%lu state during flush: %d",
                 dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
             );
             throw std::runtime_error(err);
diff --git a/blockstore_init.cpp b/blockstore_init.cpp
index 22f62986..cabd21bd 100644
--- a/blockstore_init.cpp
+++ b/blockstore_init.cpp
@@ -114,7 +114,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
                 }
                 entries_loaded++;
 #ifdef BLOCKSTORE_DEBUG
-                printf("Allocate block (clean entry) %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
+                printf("Allocate block (clean entry) %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
 #endif
                 bs->data_alloc->set(done_cnt+i, true);
                 bs->clean_db[entry->oid] = (struct clean_entry){
@@ -125,7 +125,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
             else
             {
 #ifdef BLOCKSTORE_DEBUG
-                printf("Old clean entry %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
+                printf("Old clean entry %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
 #endif
             }
         }
@@ -454,7 +454,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             {
 #ifdef BLOCKSTORE_DEBUG
                 printf(
-                    "je_small_write%s oid=%lu:%lu ver=%lu offset=%u len=%u\n",
+                    "je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u\n",
                     je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                     je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
                     je->small_write.offset, je->small_write.len
@@ -539,7 +539,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                     bs->journal.used_sectors[proc_pos]++;
 #ifdef BLOCKSTORE_DEBUG
                     printf(
-                        "journal offset %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+                        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
                         proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
                     );
 #endif
@@ -555,7 +555,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             {
 #ifdef BLOCKSTORE_DEBUG
                 printf(
-                    "je_big_write%s oid=%lu:%lu ver=%lu loc=%lu\n",
+                    "je_big_write%s oid=%lx:%lx ver=%lu loc=%lu\n",
                     je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
                     je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location
                 );
@@ -593,7 +593,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             else if (je->type == JE_STABLE)
             {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
+                printf("je_stable oid=%lx:%lx ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
 #endif
                 // oid, version
                 obj_ver_id ov = {
@@ -605,7 +605,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             else if (je->type == JE_ROLLBACK)
             {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
+                printf("je_rollback oid=%lx:%lx ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
 #endif
                 // rollback dirty writes of <oid> up to <version>
                 obj_ver_id ov = {
@@ -617,7 +617,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
             else if (je->type == JE_DELETE)
             {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
+                printf("je_delete oid=%lx:%lx ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
 #endif
                 auto clean_it = bs->clean_db.find(je->del.oid);
                 if (clean_it == bs->clean_db.end() ||
diff --git a/blockstore_rollback.cpp b/blockstore_rollback.cpp
index c3040d60..b980be86 100644
--- a/blockstore_rollback.cpp
+++ b/blockstore_rollback.cpp
@@ -230,7 +230,7 @@ void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start,
         int used = --journal.used_sectors[dirty_it->second.journal_sector];
 #ifdef BLOCKSTORE_DEBUG
         printf(
-            "remove usage of journal offset %08lx by %lu:%lu v%lu (%d refs)\n", dirty_it->second.journal_sector,
+            "remove usage of journal offset %08lx by %lx:%lx v%lu (%d refs)\n", dirty_it->second.journal_sector,
             dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, used
         );
 #endif
diff --git a/blockstore_stable.cpp b/blockstore_stable.cpp
index 0e1ca8e8..da1e0b2e 100644
--- a/blockstore_stable.cpp
+++ b/blockstore_stable.cpp
@@ -203,7 +203,7 @@ void blockstore_impl_t::mark_stable(const obj_ver_id & v)
             }
         }
 #ifdef BLOCKSTORE_DEBUG
-        printf("enqueue_flush %lu:%lu v%lu\n", v.oid.inode, v.oid.stripe, v.version);
+        printf("enqueue_flush %lx:%lx v%lu\n", v.oid.inode, v.oid.stripe, v.version);
 #endif
         flusher->enqueue_flush(v);
     }
diff --git a/blockstore_sync.cpp b/blockstore_sync.cpp
index acfb5792..e95911c0 100644
--- a/blockstore_sync.cpp
+++ b/blockstore_sync.cpp
@@ -136,7 +136,7 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op)
             journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
             printf(
-                "journal offset %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+                "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
                 dirty_db[*it].journal_sector, it->oid.inode, it->oid.stripe, it->version,
                 journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
             );
@@ -254,7 +254,7 @@ void blockstore_impl_t::ack_one_sync(blockstore_op_t *op)
     for (auto it = PRIV(op)->sync_big_writes.begin(); it != PRIV(op)->sync_big_writes.end(); it++)
     {
 #ifdef BLOCKSTORE_DEBUG
-        printf("Ack sync big %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
+        printf("Ack sync big %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
 #endif
         auto & unstab = unstable_writes[it->oid];
         unstab = unstab < it->version ? it->version : unstab;
@@ -277,7 +277,7 @@ void blockstore_impl_t::ack_one_sync(blockstore_op_t *op)
     for (auto it = PRIV(op)->sync_small_writes.begin(); it != PRIV(op)->sync_small_writes.end(); it++)
     {
 #ifdef BLOCKSTORE_DEBUG
-        printf("Ack sync small %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
+        printf("Ack sync small %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
 #endif
         auto & unstab = unstable_writes[it->oid];
         unstab = unstab < it->version ? it->version : unstab;
diff --git a/blockstore_write.cpp b/blockstore_write.cpp
index 59997d97..a7ffcd41 100644
--- a/blockstore_write.cpp
+++ b/blockstore_write.cpp
@@ -65,9 +65,9 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
     }
 #ifdef BLOCKSTORE_DEBUG
     if (is_del)
-        printf("Delete %lu:%lu v%lu\n", op->oid.inode, op->oid.stripe, op->version);
+        printf("Delete %lx:%lx v%lu\n", op->oid.inode, op->oid.stripe, op->version);
     else
-        printf("Write %lu:%lu v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
+        printf("Write %lx:%lx v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
 #endif
     // No strict need to add it into dirty_db here, it's just left
     // from the previous implementation where reads waited for writes
@@ -220,7 +220,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
         journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
         printf(
-            "journal offset %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+            "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
             dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
             journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
         );
@@ -321,7 +321,7 @@ resume_2:
     journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
     printf(
-        "journal offset %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
         journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version,
         journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
     );
@@ -342,7 +342,7 @@ resume_2:
 resume_4:
     // Switch object state
 #ifdef BLOCKSTORE_DEBUG
-    printf("Ack write %lu:%lu v%lu = %d\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
+    printf("Ack write %lx:%lx v%lu = %d\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
 #endif
     bool imm = (dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE
         ? (immediate_commit == IMMEDIATE_ALL)
@@ -477,7 +477,7 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
     journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
     printf(
-        "journal offset %08lx is used by %lu:%lu v%lu (%lu refs)\n",
+        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
         dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
         journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
     );
diff --git a/dump_journal.cpp b/dump_journal.cpp
index 37f86509..78b2a728 100644
--- a/dump_journal.cpp
+++ b/dump_journal.cpp
@@ -107,7 +107,7 @@ void journal_dump_t::dump_block(void *buf)
         else if (je->type == JE_SMALL_WRITE || je->type == JE_SMALL_WRITE_INSTANT)
         {
             printf(
-                "je_small_write%s oid=%lu:%lu ver=%lu offset=%u len=%u loc=%08lx",
+                "je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u loc=%08lx",
                 je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                 je->small_write.oid.inode, je->small_write.oid.stripe,
                 je->small_write.version, je->small_write.offset, je->small_write.len,
@@ -143,22 +143,22 @@ void journal_dump_t::dump_block(void *buf)
         else if (je->type == JE_BIG_WRITE || je->type == JE_BIG_WRITE_INSTANT)
         {
             printf(
-                "je_big_write%s oid=%lu:%lu ver=%lu loc=%08lx\n",
+                "je_big_write%s oid=%lx:%lx ver=%lu loc=%08lx\n",
                 je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
                 je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location
             );
         }
         else if (je->type == JE_STABLE)
         {
-            printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
+            printf("je_stable oid=%lx:%lx ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
         }
         else if (je->type == JE_ROLLBACK)
         {
-            printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
+            printf("je_rollback oid=%lx:%lx ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
         }
         else if (je->type == JE_DELETE)
         {
-            printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
+            printf("je_delete oid=%lx:%lx ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
         }
         pos += je->size;
         entry++;
diff --git a/osd_primary_subops.cpp b/osd_primary_subops.cpp
index 9e85057e..12c7471f 100644
--- a/osd_primary_subops.cpp
+++ b/osd_primary_subops.cpp
@@ -141,7 +141,7 @@ void osd_t::submit_primary_subops(int submit_type, uint64_t op_version, int pg_s
                 });
 #ifdef OSD_DEBUG
                 printf(
-                    "Submit %s to local: %lu:%lu v%lu %u-%u\n", wr ? "write" : "read",
+                    "Submit %s to local: %lx:%lx v%lu %u-%u\n", wr ? "write" : "read",
                     op_data->oid.inode, op_data->oid.stripe | stripe_num, op_version,
                     subops[i].bs_op->offset, subops[i].bs_op->len
                 );
@@ -168,7 +168,7 @@ void osd_t::submit_primary_subops(int submit_type, uint64_t op_version, int pg_s
                 };
 #ifdef OSD_DEBUG
                 printf(
-                    "Submit %s to osd %lu: %lu:%lu v%lu %u-%u\n", wr ? "write" : "read", role_osd_num,
+                    "Submit %s to osd %lu: %lx:%lx v%lu %u-%u\n", wr ? "write" : "read", role_osd_num,
                     op_data->oid.inode, op_data->oid.stripe | stripe_num, op_version,
                     subops[i].req.sec_rw.offset, subops[i].req.sec_rw.len
                 );
diff --git a/osd_test.cpp b/osd_test.cpp
index bba26011..437d04b3 100644
--- a/osd_test.cpp
+++ b/osd_test.cpp
@@ -208,7 +208,7 @@ uint64_t test_read(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t ver
         return 0;
     }
     free(data);
-    printf("Read %lu:%lu v%lu = v%lu\n", inode, stripe, version, reply.sec_rw.version);
+    printf("Read %lx:%lx v%lu = v%lu\n", inode, stripe, version, reply.sec_rw.version);
     op.hdr.opcode = OSD_OP_SEC_LIST;
     op.sec_list.list_pg = 1;
     op.sec_list.pg_count = 1;
@@ -232,7 +232,7 @@ uint64_t test_read(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t ver
     {
         if (ov[i].oid.inode == inode && (ov[i].oid.stripe & ~(4096-1)) == (stripe & ~(4096-1)))
         {
-            printf("list: %lu:%lu v%lu stable=%d\n", ov[i].oid.inode, ov[i].oid.stripe, ov[i].version, i < reply.sec_list.stable_count ? 1 : 0);
+            printf("list: %lx:%lx v%lu stable=%d\n", ov[i].oid.inode, ov[i].oid.stripe, ov[i].version, i < reply.sec_list.stable_count ? 1 : 0);
         }
     }
     return 0;