diff --git a/docs/source/guides/admin-guides/references/man1/packimage.1.rst b/docs/source/guides/admin-guides/references/man1/packimage.1.rst
index 4c8568b15..29b625cb3 100644
--- a/docs/source/guides/admin-guides/references/man1/packimage.1.rst
+++ b/docs/source/guides/admin-guides/references/man1/packimage.1.rst
@@ -33,7 +33,7 @@ DESCRIPTION
 
 Packs the stateless image from the chroot file system into a file to be sent to the node for a diskless boot.
 
-Note: For an osimage that is deployed on a cluster, running \ **packimage**\  will overwrite the existing rootimage file and be unavailable to the compute nodes while \ **packimage**\  is running.
+Note: \ **packimage**\  writes the new file next to the existing one and replaces it only when the new file is complete. Compute nodes can download the existing file while \ **packimage**\  runs, and the existing file stays if \ **packimage**\  fails. The image directory needs space for both files while \ **packimage**\  runs.
 
 
 **********
diff --git a/xCAT-client/pods/man1/packimage.1.pod b/xCAT-client/pods/man1/packimage.1.pod
index 32e91d9f7..45dd1da69 100644
--- a/xCAT-client/pods/man1/packimage.1.pod
+++ b/xCAT-client/pods/man1/packimage.1.pod
@@ -14,7 +14,7 @@ B<packimage> [B<-m>|B<--method> B<cpio|tar|squashfs>] [B<-c>|B<--compress> B<gzi
 
 Packs the stateless image from the chroot file system into a file to be sent to the node for a diskless boot.
 
-Note: For an osimage that is deployed on a cluster, running B<packimage> will overwrite the existing rootimage file and be unavailable to the compute nodes while B<packimage> is running.
+Note: B<packimage> writes the new file next to the existing one and replaces it only when the new file is complete. Compute nodes can download the existing file while B<packimage> runs, and the existing file stays if B<packimage> fails. The image directory needs space for both files while B<packimage> runs.
 
 =head1 PARAMETERS