ADSM-L

Re: Disappearing Tapes

2001-08-31 13:49:13
Subject: Re: Disappearing Tapes
From: Kelli Jones <JONESK AT CO.CHESTERFIELD.VA DOT US>
Date: Fri, 31 Aug 2001 13:50:51 -0400
Makes sense...but I still have a question...
we have DB Backup Series Expiration Days set to 7 and the DELETE VOLHIST is 
todate-7...is the disappearing tape problem due to the fact that on Monday the 
2 extra tapes go over (the ones for Sat and Sun) and then on Friday, when there 
are 8 tapes at the vault, the DELETE VOLHIST deletes 7 days worth of tapes 
(which would be eight actual tapes) and DRM only keeps track of 7 so there is 
an extra tape at the vault that is then lost to the system because of the 
DELETE VOLHIST activity?

Please hang in there with me...my head is beginning to spin...I just want to 
know why, if both parms are set to 7, the tapes managed to disappear...
 
Thanks,
Kelli Jones
jonesk AT co.chesterfield.va DOT us 

>>> Robin Sharpe <Robin_Sharpe AT BERLEX DOT COM> 08/31/01 09:56AM >>>
Kelli,

When using DRM, you should not do a delete volhist at all (at least not for
DBB volumes).  DRM takes care of it.  You can delete other types of tapes
from the volhist if you wish (STGNEW, STGDELETE, etc.).  I suggest just
turning off your DELETE_DBVOLHIST schedule for a few weeks and see if it
clears up the problem.  You should also do a "Q DRMSTAT" and check the "DB
Backup Series Expiration Days" value.  We have a very similar vaulting
schedule to yours, and ours is set to two days.

HTH
Robin Sharpe
Berlex Laboratories




                    Kelli Jones
                    <[email protected] 
                    ELD.VA.US>           To:    ADSM-L AT VM.MARIST DOT EDU 
                                         cc:    (bcc: Robin Sharpe/WA/USR/SHG)
                    08/31/01 08:59 AM    Subject:
                    Please respond to           Re: Disappearing Tapes
                    "ADSM: Dist Stor
                    Manager"







I was thinking that maybe it was the DB tapes...we are using DRM and here's
our db backup scenario...we have one DB tape going over each day, and one
returning.  On the weekends, there are no vault runs...on Monday, three
tapes go over (Saturday's, Sunday's and Monday's)...The system only asks
for one DB tape to come back from the vault each day.  Our DELETE_DBVOLHIST
is 'delete todate=today--7'.  I think those weekend tapes may be lost in
the shuffle....can I change this delete pararmeter on the delete volhist
schedule so that this won't happen?

Thanks!

Kelli Jones
jonesk AT co.chesterfield.va DOT us 



>>> Yanki Yuksel <Yanki.Yuksel AT TAS.ALCATEL DOT CA> 08/30/01 11:09AM >>>
Are you also sending out your database backup tapes?  If so, do you have a
schedule in place that regularly deletes old database volumes?  If you do,
this would explain your situation.

If you send a database volume offsite, it will not show up in a query
volume or query libvolume command.  The only way to see them is to query
the volhistory.  If you have a scheduled clean up of the database volumes ,
they will be automatically deleted from the volhistory (The only way to
delete a DB volume).  This will result in tapes being kept at the off site
vault with no records left to identify them.

I hope this helps.

Yanki
_____________________________
Yanki Yuksel
Sr. Systems/Network Administrator
Alcatel Canada
1235 Ormont Drive
Weston, Ontario, Canada
M9L 2W6
Tel:  (416) 742-3900 ext 5767
Fax: (416) 742-9088
e-mail : Yanki.Yuksel AT tas.alcatel DOT ca 
_____________________________




                    Kelli Jones
                    <[email protected]        To:
ADSM-L AT VM.MARIST DOT EDU 
                    ELD.VA.US>                  cc:
                    Sent by: "ADSM: Dist        Subject:     Disappearing
Tapes
                    Stor Manager"
                    <ADSM-L AT VM.MARIST DOT ED 
                    U>


                    08/29/2001 05:26 PM
                    Please respond to
                    "ADSM: Dist Stor
                    Manager"






We conducted an audit on our off site tapes today and found that while all
of the tapes in Vault status were at the storage facility, there were many
tapes there (physically) that were not on our list and therefore, not in
vault status.   When we query these tapes in the system there is 'No match
found'.   We have very good checks and balances with the vendor...all tapes
are verified coming in and going out so it appears as if the tapes have
just disappeared from TSM.  Any ideas?

Kelli Jones
jonesk AT co.chesterfield.va DOT us 
Chesterfield County, VA
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