diff --git a/build/buildcvs b/build/buildcvs
index b797be017279cb2043ce354fc22296403e27f85d..85bad5735acc2f7ce8c091aa5b7aeeed040a6ae7 100644
--- a/build/buildcvs
+++ b/build/buildcvs
@@ -200,7 +200,14 @@ case "$lustretag" in
         ldiskfstag="b_hd_rocache_oss"
         libcfstag="HEAD"
         ;;
-    
+ 
+    # vector read/write 
+    b_hd_readx)
+        lnettag="HEAD"
+        ldiskfstag="$ldiskfstag_head"
+        libcfstag="HEAD"
+        ;;
+   
     # uMDS
     b_dmu_umds)
         lnettag="b_uoss_umds"