HP StorageWorks Clustered File System 3.6.0 Windows Storage Server Edition Administration Guide (403103-005, January 2008)

Chapter 8: Configure Dynamic Volumes 77
Destroying a dynamic volume removes the volume signature from each
subdevice associated with the volume, freeing the subdevices for use in
other dynamic volumes or filesystems.
Configuration Limits
The configuration limits for dynamic volumes are as follows:
• A maximum size of 16 TB for a dynamic volume.
• A maximum of 128 dynamic volumes per cluster.
• A maximum of 128 subdevices per dynamic volume.
• Concatenated dynamic volumes can be extended up to 128 times;
however, the total number of subdevices cannot exceed 128.
• Striped dynamic volumes can be extended up to 16 times; however,
the total number of subdevices cannot exceed 128.
Guidelines for Creating Striped Dynamic Volumes
When creating striped dynamic volumes, follow these guidelines:
• The subdevices used for a striped dynamic volume should be the
same size. The CFS Volume Manager uses the same amount of space
on each subdevice in the stripeset. When a striped dynamic volume is
created, the CFS Volume Manager determines the size of the smallest
specified subdevice and then uses only that amount of space on each
subdevice. If the subdevices are different sizes, the additional space on
the larger subdevices will be wasted.
This limitation also applies when a striped dynamic volume is
extended. The newly added subdevices constitute a new stripeset. The
size of the smallest subdevice determines the amount of space that
will be used on each of the subdevices.
• In general, the stripe size should be set to 2 MB or greater, and, for
many disk arrays, disk partitions should be aligned on block
boundaries (see “Disk Partition Alignment” on page 64).