=head1 NAME backup_restoredb - Restores a saved copy of the Backup Database =head1 SYNOPSIS =for html
B S<<< [B<-portoffset> >] >>> [B<-localauth>] S<<< [B<-cell> >] >>> [B<-help>] B S<<< [B<-p> >] >>> [B<-l>] S<<< [B<-c> >] >>> [B<-h>] =for html
=head1 DESCRIPTION The B command restores to the Backup Server machine's local disk a version of the Backup Database previously written to tape by using the B command. (If the C instruction appears in the F> file associated with the specified port offset, then the B command restores data from the backup data file listed for that port offset in the Tape Coordinator's F file, instead of from tape. For the sake of clarity, the following text refers to tapes only, but the Backup System handles backup data files in much the same way.) The most common reason to run this command is to replace a corrupted or otherwise damaged Backup Database; use the B command to determine the database's status. The command can also be used to restore records that were removed from the database when the B<-archive> argument was included on a previous B command. The command completely overwrites the existing Backup Database records for volume sets, Tape Coordinators, and the dump hierarchy with the corresponding information from the saved version. It does not overwrite existing dump records, but instead interleaves the records from the copy being restored. If both the existing database (on the Backup Server machine's disk) and the copy being restored include a record about the same dump, the Backup System retains the one in the existing database. The Tape Coordinator's default response to this command is to access the first tape it needs by invoking the C instruction in the local F> file, or by prompting the backup operator to insert the tape if there is no C instruction. However, if the C instruction appears in the F> file, or if the issuer of the B command included the B<-noautoquery> flag, the Tape Coordinator instead expects the tape to be in the device already. If it is not, or is the wrong tape, the Tape Coordinator invokes the C instruction or prompts the operator. It also invokes the C instruction or prompts for any additional tapes needed to complete the restore operation; the backup operator must arrange to provide them. =head1 CAUTIONS If the database is corrupted, do not attempt to restore a saved database on top of it. Instead, use the instructions for repairing a corrupted database in the I chapter about performing backup operations. =head1 OPTIONS =over 4 =item B<-portoffset> > Specifies the port offset number of the Tape Coordinator handling the tapes for this operation. =item B<-localauth> Constructs a server ticket using a key from the local F file. The B command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the B<-cell> argument. For more details, see L. =item B<-cell> > Names the cell in which to run the command. Do not combine this argument with the B<-localauth> flag. For more details, see L. =item B<-help> Prints the online help for this command. All other valid options are ignored. =back =head1 EXAMPLES The following example shows the Backup Database being restored from the Tape Coordinator with port offset 0: % backup restoredb =head1 PRIVILEGE REQUIRED The issuer must be listed in the F file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser C if the B<-localauth> flag is included. =head1 SEE ALSO L, L, L, L, L The I at L. =head1 COPYRIGHT IBM Corporation 2000. All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.