H.13 Disk Not Properly Aligned on the Target VM

Issue: One or more disks in the target workload’s primary partition is misaligned with the backend storage resulting in increased I/O operations per second.

Fix: The PlateSpin Configuration parameter PartitionAlignmentSizeInKB controls the alignment of a target workload’s primary partition that is not cylinder aligned at the beginning of a disk and rounds the offset to the closest alignment boundary. The value of this parameter is the number of kilobytes (KB) from the beginning of the disk to the closest alignment boundary. This is applicable only for workloads with MBR partitions.

To specify the disk alignment value:

  1. Log in as Administrator to the PlateSpin Migrate Web Interface, then open the PlateSpin Server Configuration page at:

    https://Your_PlateSpin_Server/PlateSpinConfiguration/

  2. Locate the PartitionAlignmentSizeInKB parameter and click Edit.

  3. Edit the value based on the following allowed values. If you specify a value other than the allowed value, then the default value is applicable.

    • For a Windows workload: The default value is 1024 and you can set one of the following allowed values: 1024, 2048, 4096.

    • For a Linux workload: The default value is 64 and you can set one of the following allowed values: 64,128,256, 512,1024, 2048.

  4. Save your settings and exit the page.