RESTOR(VIII) 11/24/73 RESTOR(VIII) NAME restor - incremental file system restore SYNOPSIS restor key [ arguments ] DESCRIPTION Restor is used to read magtapes dumped with the dump command. The key argument specifies what is to be done. Key is a character from the set trxw. t The date that the tape was made and the date that was specified in the dump command are printed. A list of all of the i-numbers on the tape is also given. r The tape is read and loaded into the file system specified in arguments. This should not be done lightly (see below). x Each file on the tape is individually extracted into a file whose name is the file's i-number. If there are arguments, they are interpreted as i-numbers and only they are extracted. c If the tape overflows, increment the last character of its name and continue on that drive. (Normally it asks you to change tapes.) f Read the dump from the next argument file instead of the tape. i All read and checksum errors are reported, but will not cause termination. w In conjunction with the x option, before each file is extracted, its i-number is typed out. To extract this file, you must respond with y. The x option is used to retrieve individual files. If the i-number of the desired file is not known, it can be discovered by following the file system directory search algorithm. First retrieve the root directory whose i-number is 1. List this file with ls -fi 1. This will give names and i-numbers of sub-directories. Iterating, any file may be retrieved. The r option should only be used to restore a complete dump tape onto a clear file system or to restore an incremental dump tape onto this. Thus /etc/mkfs /dev/rp0 40600 restor r /dev/rp0 is a typical sequence to restore a complete dump. Another restor can be done to get an incremental dump in on top of this. A dump followed by a mkfs and a restor is used to change the size of a file system. FILES /dev/mt0 SEE ALSO ls (I), dump (VIII), mkfs (VIII), clri (VIII) DIAGNOSTICS There are various diagnostics involved with reading the tape and writing the disk. There are also diagnostics if the i- list or the free list of the file system is not large enough to hold the dump. If the dump extends over more than one tape, it may ask you to change tapes. Reply with a new-line when the next tape has been mounted. BUGS There is redundant information on the tape that could be used in case of tape reading problems. Unfortunately, restor's approach is to exit if anything is wrong.