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Conference vaxaxp::alphanotes

Title:	Alpha Support Conference
Notice:	This is a new Alphanotes, please read note 2.2
Moderator:	VAXAXP::BERNARDO

Created:	Thu Jan 02 1997
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	128
Total number of notes:	617

117.0. "Multivolume backup with TLZ09" by BARNA::DSMAIL () Tue May 27 1997 10:20

    Hello:
    
    An alphastation 200 with TLZ09 makes a backup with compaction; when the
    backup reaches the 8 Gb (the tape is finished) it finish without any errors
    like succesfully and without ask the second tape. 
    The reality is that this backup is incomplete because the customer is 
    trying to backup more than 8 GB.
    
    The system has OpenVMS AXP 6.2-1H2.
    
    Any ideas?
    
    Thanks in advance for your coopoeration.
    
    Crist�bal  (IB004::PONCE)

T.R	Title	User	Personal Name	Date	Lines
117.1	Need more evidence	BSS::JILSON	WFH in the Chemung River Valley	`Tue May 27 1997 12:08`	7
	How does the customer know there is more to be put onto the tape? There may be files maked NOBACKUP or interlocked that would prevent them from being saved. What is the command? What was $STATUS after the BACKUP finished? DOes the listing of the saveset reflect that there should have been more files saved? Jilly
117.2	Commands? Assumptions?	XDELTA::HOFFMAN	Steve, OpenVMS Engineering	`Tue May 27 1997 14:46`	15
	The value returned by DIRECTORY/TOTAL SYS$SYSDEVICE:[*...] is notoriously larger than the actual usage, and the SHOW DEVICE value -- as .1 has also mentioned -- includes many files not included in most system BACKUPs. What are the BACKUP, INIT and MOUNT commands used? Has the customer tried BACKUP/LIST, BACKUP/VERIFY, and BACKUP/COMPARE to determine if the BACKUP actually completed, or is the customer just assuming the BACKUP did not complete? Also note that it is possible that the compression algorithm might be performing somewhat better than the 2x compression that is normally expected -- the compression efficiency is rather data-dependent...
117.3	problem solved, bad logical	BARNA::DSMAIL		`Fri Jun 06 1997 08:04`	15
	Hello: I make some test here with the TLZ09 and worked OK. Then i asked customer following your suggestions. The result is the customer was making a backup with a logical as input device that points to several disks and directorys and this is the problem. The customer was making a bcakup of the whole disk but noy image. I suggested to mak the backups image and when reaches the end of the first tape it request the second well. Then solved. Thanks for your quick answers and sugestions. Cristobal
117.4	BACKUP/IMAGE/NOALIAS	XDELTA::HOFFMAN	Steve, OpenVMS Engineering	`Fri Jun 06 1997 11:19`	10
	As an additional way to reduce the amount of storage required for the BACKUP, use BACKUP/IMAGE/NOALIAS -- this saves one copy of the file, when multiple aliases are in use. (This means one can /SELECT only the primary alias when performing a per-file restoration of a BACKUP /IMAGE saveset. The saveset is fully restorable otherwise, and all alias links are restored when a BACKUP/IMAGE restoration is performed.)