VSP One Block 85 supports the use of the ICKDSF utility program. ICKDSF performs functions for the installation, use, and maintenance of DASD and service functions, error detection. For further information about ICKDSF, see the IBM® document, ICKDSF R16 Refresh User's Guide (GC35 0033), or other IBM® documents on ICKDSF R16 or later. See the Mainframe Host Attachment and Operations Guide for further information about using ICKDSF with the storage system.