Henk Vandenbergh

Vdbench Data Validation while creating a new file

Symptom: "The amount of data blocks in a lun must be at least 3000 times the data transfersize when using Data Validation. "

When running Data Validation your file or lun needs to be large enough to contain at least 3000 blocks.
So, if your have xfersize=8k then your lun or file size must be at least 3000*8k.

However, when you run Data Validation against a new file that will be created during a Data Validation run, Vdbench wants to create and pre-format the file using xfersize=1m. That means that Vdbench wants the file to be at least 3000*1m=3g large. To avoid the problem, just run the creation of the file WITHOUT Data Validation, and then as soon as the format is complete, cancel the run and restart it with Data Validation. Since the file now exists a format with xfersize=1m no longer is needed. In the next version I will change the xfersize for a file creation and format using Data Validation to 64k.

Henk.

Posted at 09:32PM Aug 08, 2009 by Henk Vandenbergh in Sun  |  Comments[0]