Restoring Raw Data from Tape			16 Jan 2002

    Raw data is stored on tape in backup save sets named ddmmm_ddmmmyy.bck,
indicating the date range being stored.  (dd is the one or two digit day of
the month, mmm is the month abbreviation, and yy is the last two digits of the
year.)  Each DAT tape has a directory listing giving the save set names stored
and the scan number range.  One can see the directory listing by

	    TYPE DAT:nnDATA_DIR

on either Frankenheim or Kronen, where nn is the tape number.  Raw data files
are named nnnnT.RAW, where nnnn is the four digit scan number.  (It has leading
zeros when the scan number is <1000).  To restore raw data files, use a BACKUP
command of the form: 

	BACKUP/LOG/IGNORE=LABEL KRONEN$MUA0:<save set name> -
	    	/SELECT=(nn*T.RAW,mm*T) <destination directory>

where <save set name> is the name found in the DAT:nnDATA_DIR file (you can
omit the ";1" on the end of the name), "nn*T.RAW,mm*T" specifies what
scans you want, and <destination directory> is where the files should be 
stored.  In this example, nn* and mm* stand for wildcarded file names.
One need not use a wildcard "*" at all if you don't mind listing each file 
name.  (The /SELECT option will accept a comma separated list of as many
specifications as needed.)

    The command can be executed on Kronen or Frankenheim, but the most 
efficient (but more Kronen intensive) would be to choose Kronen and a 
directory on KRAW.  If more than one save set is needed, do another 
BACKUP command.  (These should be done in the order the save sets are
stored on the tape to avoid needing the /REWIND option.)  When done with 
a given tape, do a DISMOUNT KRONEN$MUA0 command to eject the tape and release
the tape drive to other users.  Do not use KDISK or FDISK for the destination
directory, as this could fill these system disks and crash Kronan or
Frankenheim. 

    Example:  Restore raw data 7805 to 8015 to KRAW:[SMT.OLD_RAW].

	TYPE DAT:90DATA_DIR

Directory KRONEN$MUA0:[]

7DEC_9DEC01.BCK;1      24247   9-DEC-2001 00:00:00.00 -> Scans 6648 to 7148
9DEC_14DEC01.BCK;1     16309  14-DEC-2001 00:00:00.00 -> Scans 7152 to 7669
14DEC_17DEC01.BCK;1
                       16427  17-DEC-2001 00:00:00.00 -> Scans 7670 to 7945
17DEC_17DEC01.BCK;1
                        9205  18-DEC-2001 00:00:00.00 -> Scans 7947 to 8152
18DEC_21DEC01.BCK;1
                        4240  21-DEC-2001 00:00:00.00 -> Scans 8154 to 8618
29DEC_4JAN02.BCK;1       777   4-JAN-2002 00:00:00.00 -> Scans 8637 to 8972

Total of 6 files, 71205 blocks.     (2190 MBytes)

	BACKUP/LOG/IGNORE=LABEL KRONEN$MUA0:14DEC_17DEC01.BCK -
		/SELECT=(78*T.RAW,79*T) KRAW:[SMT.OLD_RAW]
	BACKUP/LOG/IGNORE=LABEL KRONEN$MUA0:17DEC_17DEC01.BCK -
		/SELECT=(79*T.RAW,800*T,801*T) KRAW:[SMT.OLD_RAW]

    This will actually restore 7800-8019.  One could then delete the unwanted
files.  Or to get precisely the files 7805-8015, one could use

	    /SELECT=(7805T.RAW,7806T,7807T,7808T,7809T,781*T,782*T,783*T,-
784*T,785*T,786*T,787*T,788*T,789*T,79*T)

for the first BACKUP, and

	    /SELECT=(79*T.RAW,800*T,8010T,8011T,8012T,8013T,8014T,8015T)

on the second one.