There was no limitation from Windows but this was a limitation from
adaptec scsi card.

No problem with Fiber cards.

F@b

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Bob Stump
Sent: mercredi 16 novembre 2005 16:56
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] limitations on SIZE_DATA_BUFFERS

Thank ypu to all who answered my earlier post.
The correct answer given to me was  256K (262144)

Here is a followup question.
Can this value also be used in W2K and W2K3 servers?
I seem to remember limitations in earlier versions of Windows/NetBackup.


>>> Bob Stump 11/15/2005 4:47 PM >>>
Because the data buffer size equals the tape I/O size, the value
specified in SIZE_DATA_BUFFERS must not exceed the maximum tape I/O size
supported by the tape drive or operating system. This is usually 256 KB
or 128 KB.

For Digital Linear Tape (DLT) drives, the number that seems to give the
best performance for SIZE_DATA_BUFFERS is 65536. Further performance
improvements can be achieved by increasing the value in the
NUMBER_DATA_BUFFERS file.

What is the optimum for STK 9940B?


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