                     COMPAQ    9           Cover Letter for DECram for OpenVMS Version 3.1              May 2002             Dear DECram Customer:   F           Compaq Computer Corporation is pleased to provide DECram for/           OpenVMS Version 3.1 to our customers.   J           DECram for OpenVMS Version 3.1 is fully supported when installedJ           on any valid and licensed standalone or clustered system runningG           OpenVMS Alpha Version 7.2-1H1 or higher. The main benefits of H           Version 3.1 are significant performance enhancements for users7           running OpenVMS Alpha Version 7.3 and higher.   ,                                         NOTE  B              DECram for OpenVMS Version 3.1 cannot be installed onC              a VAX system. VAX users can install DECram for OpenVMS               Version 2.3.   D           The DECram for OpenVMS software allows a system manager toI           create psuedo disks (RAMdisks), which reside in the main memory G           of OpenVMS systems and improve I/O performance. The operating F           system can read from and write to the RAMdisk using standardI           OpenVMS disk I/O operations. This provides high speed access to I           read-only data such as libraries, fonts, databases, and command            files.  F           There are no special hardware requirements to install DECramJ           for OpenVMS. As with DECram for OpenVMS Version 3.0, the VersionJ           3.1 limit on DECram disk size is 4,294,967,296 blocks on systemsI           running OpenVMS Alpha Version 7.2-1H1 or higher. It is possible F           to create logically contiguous devices geater than either ofF           these limits by creating multiple DECram devices and binding           them together.  J           DECram for OpenVMS Version 3.1 supports operation in an AdaptiveG           Partitioned Multiprocessing (APMP) environment, also known as 9           Compaq Galaxy Software Architecture on OpenVMS.               Cluster Considerations  I           DECram for OpenVMS Version 3.1 is fully compatible with Version H           3.0 and Version 2.3, and any combination of these versions can(           be used in an OpenVMS Cluster.  I           If your first installation of the DECram product in a clustered H           environment is Version 3.0 or higher (on nodes running OpenVMSF           Alpha Version 7.2-1H1 or higher), you can install the DECramG           software just once if all nodes in the cluster share a common H           disk. However, you must install a license key for each node inH           the cluster that will use the DECram product. When you installI           DECram in a cluster, be sure only one installation is active at            once.                    G           If you install the DECram software in a clustered environment H           where there is no common system disk, the DECram software must$           be installed on each node.  I           If you want to upgrade nodes in a cluster from DECram for Open- F           VMS Version 2.3, the DECram for OpenVMS Version 3.1 softwareD           must be installed over Version 2.3. You cannot remove Ver-F           sion 2.3 except by installing DECram for OpenVMS Version 3.0H           or higher over it. Note that if you subsequently remove DECramF           for OpenVMS, the older version will automatically be removedI           too. If you later want to run an earlier version of DECram, you            must reinstall it.  F           Multiple DECram devices can be members of a Volume ShadowingJ           for OpenVMS shadow set and can be served by mass storage control>           protocol (MSCP) in an OpenVMS Cluster configuration.             Documentation   D           During the DECram for OpenVMS installation, the DECram forG           OpenVMS User's Manual and the DECram for OpenVMS Installation F           Guide are copied in PostScript (.PS) and ASCII (.TXT) formatD           to the SYS$HELP directory. Look for the following files in           [SYS$HELP]:   $              DECRAM_INSTALL_GUIDE.PS%              DECRAM_INSTALL_GUIDE.TXT   #              DECRAM_USERS_MANUAL.PS $              DECRAM_USERS_MANUAL.TXT  H           These manuals are also shipped in Adobe Portable Document For-I           mat (.PDF) and HyperText Markup Language (.HTML) in the OpenVMS I           Alpha Online Documentation Library (available by subscription). F           If you plan to view the HTML files using a browser, all HTMLG           files associated with the Installation Guide (DECRAM_INSTALL_ H           GUIDE*.HTML) or User's Manual (DECRAM_USERS_MANUAL*.HTML) mustG           be copied to the directory from which you will view the docu-            ments.             Installation  I           Please read the DECram for OpenVMS Installation Guide carefully F           before starting your installation. Appendix A of that manual9           provides a sample installation of the software.       C                   2002 Compaq Information Technologies Group, L.P.   J           ________________________________________________________________F             Compaq, the Compaq logo, Alpha, OpenVMS, VAX, VMS, and theJ             DIGITAL logo are trademarks of Compaq Information Technologies;             Group, L.P. in the U.S. and/or other countries. 