Marcel,

I was just going to increase the buffer until it fails to try and get 
the best performance.

We are using DELL Poweredge servers with 2 x IBM LTO drives in a DELL 
Powervault robot

Will let you know how I get on,

Thanks,
Ian

Drunen van, Marcel wrote:

>Ian,
>
>Don't know if that will work, but keep me posted. But you're right, 32k
>blocks will probably not perform too well.
>
>Just for curiosity, what sort of server hardware are you working on?
>
>Regards,
>
>Marcel
>
>-----Original Message-----
>From: Whitt [mailto:ianw AT fjserv DOT net] 
>Sent: Monday, February 07, 2005 5:21 PM
>To: Drunen van, Marcel; veritas-bu
>Subject: Re: [Veritas-bu] media write error 84
>
>Marcel,
>
>I have created the SIZE_DATA_BUFFERS file and entered the contents below
>
>and my backup is now running. Thanks.
>
>I will increase this file in multiples of 1024 bytes to get the optimum 
>performance from my drives.
>
>Thanks again
>
>Ian
>
>Drunen van, Marcel wrote:
>
>  
>
>>Ian,
>>
>>Create that file with the desired contents, which should be 32768
>>(32x1024) in your case.
>>
>>CU,
>>
>>Marcel
>>
>>-----Original Message-----
>>From: Whitt [mailto:ianw AT fjserv DOT net] 
>>Sent: Monday, February 07, 2005 5:06 PM
>>To: Drunen van, Marcel
>>Subject: Re: [Veritas-bu] media write error 84
>>
>>Drunen van, Marcel wrote:
>>
>> 
>>
>>    
>>
>>>Ian,
>>>
>>>I was assuming you are on a Windows platform, is that correct?
>>>
>>>CU,
>>>
>>>Marcel
>>>
>>>-----Original Message-----
>>>From: Whitt [mailto:ianw AT fjserv DOT net] 
>>>Sent: Monday, February 07, 2005 4:54 PM
>>>To: Drunen van, Marcel; veritas-bu
>>>Subject: Re: [Veritas-bu] media write error 84
>>>
>>>Drunen van, Marcel wrote:
>>>
>>>
>>>
>>>   
>>>
>>>      
>>>
>>>>Ian,
>>>>
>>>>I recall having had this problem a long time ago. How much memory is
>>>>     
>>>>
>>>>        
>>>>
>>in
>> 
>>
>>    
>>
>>>>your system and are you using the /3GB or /PAE switches? IIRC we had
>>>>this problem on a W2K system with 16 GB of memory, there was some
>>>>        
>>>>
>sort
>  
>
>>>>of error that caused the buffer size to be very weird.
>>>>
>>>>CU,
>>>>
>>>>Marcel
>>>>
>>>>_______________________________________________
>>>>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>>>>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>>>>
>>>>
>>>>
>>>>  
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>Marcel,
>>>
>>>The server has 8GB of memory, I am not sure what the /3GB or /PAE 
>>>switches are that you are talking about.
>>>Can you explain these for me please ?
>>>
>>>Can you advise me how to change the buffer size ?
>>>
>>>Rgds,
>>>Ian
>>>
>>>
>>>
>>>   
>>>
>>>      
>>>
>>Marcel,
>>
>>I am using W2K yes, if i create the SIZE_DATA_BUFFERS file will NB 
>>resize the file to whatever it requires ?
>>
>>I have the tuning guide for NB 4.5 on windows which I can currently 
>>looking through
>>
>>Thanks,
>>Ian
>>
>> 
>>
>>    
>>
>
>
>  
>