Patent ID: 7249218

Claim:
A method for managing an out of available space condition, comprising: receiving a mount command for a logical volume that identifies one or more physical volume pools to be subsequently used for pre-migration, wherein the logical volume is assigned to the one or more physical volume pools, wherein each of the one or more physical volume pools includes one or more physical volumes, and wherein each of the physical volumes is a storage device that is capable of being mounted onto a physical device; determining that one or more of the physical volume pools have no physical volumes available for storing data by determining that an amount of available space on the physical volumes is at or below a threshold; and preventing data from being written to a cache by deferring completion of the mount command until the determined one or more physical volume pools has one or more physical volumes available for storing data, wherein deferring completion of the mount command for the logical volume prevents host data transfer to the logical volume in the cache.