diff --git a/doc/sysdoc/adding.packs b/doc/sysdoc/adding.packs
new file mode 100644
index 00000000..263a5da2
--- /dev/null
+++ b/doc/sysdoc/adding.packs
@@ -0,0 +1,13 @@
+HOW TO ADD A DISK PACK TO ITS
+
+Change the configuration in SALV or NSALV.  FIRSPK and LASTPK defines
+the range of packs for SALV to check and ITS to mount.
+
+Change the definition of NQS in ITS.  It should match the number of
+packs mounted.
+
+Run MARK in SALV to mark the packs.  The unit number is the disk
+drive, and the pack number is what ITS and SALV use.
+
+Use UCOP in SALV to update the MFD and UFDs on the fresh pack with
+information from a pack already in use.