El 30/04/2005, a las 10:19, kumar appan escribió:

There are some things to check. When Error 196 arise you need to look 
for suspecting subjects who cause this.

1. Check the maximum concurrent jobs per drive you're allowing on the 
storage units.  You don't state what kind of drives you're using but as 
a ballpark I use this values as a ballpark: DLT 2 to 4, SuperDLT: 3 to 
4, LTO-1: 5 to 6, LTO-2: =>6.

2. Check how many streams you're allowing on the policy definition. 
Probably you're doing backups of machine with lots of small files 
(divide and conquer). Look for some client tunning (i.e: 
DONT_SORT_FILES and others) and look for 'slow clients' who stall the 
drives.

3. Probably you're using many different pools and different backup 
retentions. If you have some jobs running, but each goes to a different 
pool you cannot take advantage of multiplexing multiple jobs to the 
same tape.

4. Look for network problems (congestion, bad network performance due 
to misconfiguration of network adapters / port switches  - Double check 
link spped / duplex mode).

5. Last but not least, check for  library dimensioning. What are the 
specs of your library, how many clients, how many jobs and most 
important: How many GB, TB you're doing daily?.

Best regards,
  Alfonso Correas

> Hi,
>
>  Most of the backups are failing with backup window closed . I had 
> increased
> backup window size . Is there anything else i can do  to get rid of
> this problem.
> Appreciate your help in this regards.
>
> Regards
> Kumar
>
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