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DiskPar Example

• You have a disk controller that can only do lazy writes if the writes are within 4 kilobyte (KB) boundries.
• One of the disks you are using reports it supports more than 63 sectors per track.
  

  Note

  You can discover this information by using diskpar -i or any other tool, such as DmDiag which displays starting sector information.

• You also have an application which continuously causes 64 KB writes to disk. In this case, each write will not be within the 4 KB boundry and disk performance would be poor.

Using DiskPar, you can modify the hidden starting offset to significantly improve write performance.

1. Start Disk Management on disk 0.
2. Delete all partitions on disk 1 making it a raw drive.
   

   Note

   Backup any data you don't want to lose before removing partitions.

3. From disk 0, run DiskPar to set the starting offset and create the first partition on disk 1:

   diskpar -s 1 

4. Enter the new starting offset (in sectors), and the partition length (in MB). This writes the new starting sector information to the Master Boot Record (MBR) for that disk, and creates the first partition.
5. Using Disk Manager, create and format all other desired paritions on disk 1.