When you backup the primary storage pool to the copy storage pool, it will
read the primary pool tape.  In the event the primary tape is bad, you'll
get a bunch of errors in the activity log.



_____________________________
William Mansfield
Senior Consultant
Solution Technology, Inc





William SO Ng <ngwso AT HK1.IBM DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
03/07/2002 03:14 AM
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Tape backup verification


Hello everyone,

I have some questions about backup verification and would like to seek
some
advice.

When I backup using TSM, how can I verify that the backup is good ?  What
I
mean is when TSM write to tape, how do I verify that the write-to-tape
process is good.  I come from VMS backup.  In VMS, it has a command:
BACKUP
/VERIFY, which will write the file to tape, rewind the tape and read the
backup file.  This will ensure that the file I wrote to the tape is good.
The disadvantage is backup time is much longer.   How does TSM do backup
verification ?  By checksum, by rewind and read ?  Is it possible to
specifiy the verification method ?

Regards
William

Tivoli Software, IBM Software Group, IBM China/Hong Kong Limited
11/F, PCCW Tower, Taikoo Place, 979 King's Road, Hong Kong
Internet : ngwso AT hk1.ibm DOT com
Tel: 2825-7613                    Fax: 2825-0022