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Netbackup media write error 84

Hello Friends,

I need yr help to fix the issue. I am having netbackup in guc cluster. 

ON Main site there are 3 media servers 
1) Main media1 - windows vwware host
2)Main media 2 - 5220 appliance
3) Main media 3 - 5230 apliance

The same setup on dr site. 

1) dr Main media1 - windows vwware host
2)dr Main media 2 - 5220 appliance
3) dr Main media 3 - 5230 apliance


I have created a storage unit 
on Main media 3 

disk type is pure disk 
and for load balancing on storage unit i have used following media servers 
(Main media 3 , Main media 2)

I am taking the backup using the san client. 

what i have observed is when ever my backup stream goes through main media 2 it fails intermediantly error 84 media write error

HOwever when the backup goes through main media 3 its runs perfectly fine. 


main-media-3.Settings> NetBackup DataBuffers Number Show
NUMBER_DATA_BUFFERS                               : 30 (Default)
NUMBER_DATA_BUFFERS_DISK                          : 30 (Default)
NUMBER_DATA_BUFFERS_FT                            : 16 (Default)
NUMBER_DATA_BUFFERS_RESTORE                       : 30 (Default)
main-media-3.Settings> NetBackup DataBuffers Size Show
SIZE_DATA_BUFFERS                                 : 262144 (Default)
SIZE_DATA_BUFFERS_DISK                            : 262144 (Default)
SIZE_DATA_BUFFERS_FT                              : 262144 (Default)

 

 


main-media-2.Settings> NetBackup DataBuffers Number Show
NUMBER_DATA_BUFFERS                               : 30 (Default)
NUMBER_DATA_BUFFERS_DISK                          : 30 (Default)
NUMBER_DATA_BUFFERS_FT                            : 16 (Default)
NUMBER_DATA_BUFFERS_RESTORE                       : 30 (Default)
main-media-2.Settings> NetBackup DataBuffers Size Show
SIZE_DATA_BUFFERS                                 : 262144 (Default)
SIZE_DATA_BUFFERS_DISK                            : 262144 (Default)
SIZE_DATA_BUFFERS_FT        


Your help is highly appreciated. 

3 Replies

Hello,   How many streams are

Hello,

 

How many streams are you writing at the same time?

 

 

each policy at the max 3 -4

each policy at the max 3 -4 streams and the num of policy i am having is close to 100. However jobs are schedule at a differnt time. And 40% jobs are configured for dr appliance. 

 

I mean streams active at any

I mean streams active at any given time on the storage unit (so max jobs running on that storage unit)