The association type of a cache area indicates whether or not automatic caching is enabled for the system. The association type attribute for the VxVM cache area is persistent. The association type can be one of the following:
auto attribute (default)
The cache area is enabled for automatic caching. All VxVM data volumes on the system are cached unless you explicitly disable caching for that volume. You do not need to explicitly enable caching on a volume.
SmartIO does not support caching RAID-5 volumes and DCO volumes. Also, SmartIO does not enable automatic caching for volumes used for logging and cache objects including Storage Replication Logs (SRLs), Data Change Maps (DCMs), and volumes used for space-optimized snapshot cache objects.
By default, a VxVM cache area has the auto attribute.
The cache area is not enabled for automatic caching. No volumes are cached automatically. You must explicitly enable caching for each volume that you want cached. You do not need to explicitly disable a volume for caching, except to exclude a volume that was previously enabled. You can enable caching when you create a volume. You can also selectively enable or disable read caching on an existing VxVM volume, without quisceing the I/O.