diff --git a/wdl/pipelines/TechAgnostic/TertiaryAnalysis/PfalciparumHrp2Hrp3Status.wdl b/wdl/pipelines/TechAgnostic/TertiaryAnalysis/PfalciparumHrp2Hrp3Status.wdl
index a742a9f5f..f1b94f893 100644
--- a/wdl/pipelines/TechAgnostic/TertiaryAnalysis/PfalciparumHrp2Hrp3Status.wdl
+++ b/wdl/pipelines/TechAgnostic/TertiaryAnalysis/PfalciparumHrp2Hrp3Status.wdl
@@ -55,7 +55,7 @@ task IsLocusDeleted {
         RuntimeAttr? runtime_attr_override
     }
 
-    Int disk_size = 1 + ceil(size(bam, "GB"))
+    Int disk_size = 1 + 2*ceil(size(bam, "GB"))  + 2*ceil(size(bai, "GB"))
 
     command <<<
         set -euxo pipefail
diff --git a/wdl/pipelines/TechAgnostic/Utility/BackupWorkspace.wdl b/wdl/pipelines/TechAgnostic/Utility/BackupWorkspace.wdl
index aa9d251e8..e635186b5 100644
--- a/wdl/pipelines/TechAgnostic/Utility/BackupWorkspace.wdl
+++ b/wdl/pipelines/TechAgnostic/Utility/BackupWorkspace.wdl
@@ -44,6 +44,7 @@ task RunBackupWithPython {
 
     meta {
         description: "Backup the workspace with the given info."
+        volatile: true
     }
     parameter_meta {
         namespace: "Namespace to which the workspace belongs."