diff -ruN scst-3.9/iscsi-scst/usr/iscsid.c scst-new-3.9/iscsi-scst/usr/iscsid.c
--- scst-3.9/iscsi-scst/usr/iscsid.c	2024-12-28 19:14:09
+++ scst-new-3.9/iscsi-scst/usr/iscsid.c	2025-10-09 10:08:50
@@ -515,8 +515,16 @@
 	 *   -  ASCII digit characters ('0'..'9' = U+0030..U+0039)
 	 */

-	if ((ch == '-') || (ch == '.') || (ch == ':') ||
+
+	/* NetApp customization:
+	 * Allow uppercase letters and underscore ('_') in iSCSI names.
+	 * WARNING: This breaks RFC3722 compliance.
+	 */
+
+
+	if ((ch == '-') || (ch == '.') || (ch == ':') || (ch == '_') ||
 	    ((ch >= 'a') && (ch <= 'z')) ||
+		((ch >= 'A') && (ch <= 'Z')) ||
 	    ((ch >= '0') && (ch <= '9')))
 		return true;