CMP-Disk, Storage Management, Realtime Compressing virtual disk, saves 2:1 to 3:1 space w/src Need to store a lot of archival information online and lack the space? This utility can save factors of 3:1 in storage space for any VMS file structure. This area contains a compressing VMS disk for Vax or Alpha (cmphighc.zip), Alpha versions of disk drivers for remote virtual disk over DECnet and host processes, and for files stored on somewhat encrypted files on local disks. The remote disk can be used for remote backup or access and will attempt to recover if the net link fails. Also present are some other odds and ends, and the SPD for a user undelete (reliable, this one) and enhanced VMS security module called SAFETY from the author. You are requested to read this also. The compressing disk works by taking a compressed image of an entire disk in a utility. The virtual disk driver (called dtdriver) and server program communicate to present the compressed image to the system as a readonly disk whose storage occupies normally 1/2 or less of the blocks the original disk does. For databases, the savings can be even more impressive. The containers can be accessed across DECnet from many sites at once if desired. Either of two algorithms may be used...a blindingly fast one, for slow VAXen normally, or the zlib (zip) one which compresses better but is slower. Build it for the one you want.