A This program is created to retrieve a system dump from a Phase II A shadowed systemdisk. The problem is that the bugcheck code writes @ to the member we booted from (normally), but as far as shadowingB is concearned the disks are the same. A merge copy which may startC after a crash may not be able to correct the blocks of the dumpfile A on all the disks of the shadowset. Suppose that a dumpfile starts ? at the end of the disk, and ends at the beginning of it. When a @ system crashes we will start writing at the end of the disk, andD it is very well possible that when we reach the part of the dumpfileC at the beginning of the disk that that part has already been merged B by a merge copy. The net result is inconsistent data as far as theF dumpfile is concearned. This can of course be corrected by dismountingC members of the shadowset except the master, and remount the members B after which a full shadowcopy will correct things. This may have aA rather high impact, which most customers don't want on their live D systems. Another way to correct things is to trigger a merge copy onF the fly. That's certainly possible but it involves kernel-mode hackingF which is always error-prone. What we do here is look for the retrievalG pointers of the dumpfile (they are already stored in memory by SYSINIT) F and look which shadowset member is the master. We then copy all blocks@ mapped by the dumpfile from the master member to an output file.  < This version supports both the Alpha- and VAX architectures.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          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