Volume having tiers of different storage traits

A method for exposing up a volume to the file system using at least some of a plurality of underlying storage systems including at least a first storage system that exposes first storage that has a first set of traits to the file system and a second storage system that exposes second storage that has a second set of traits to the file system, the method comprising:

• an act of mapping each of at least some of the plurality of logical storage locations of the first tier with physical storage locations of the first underlying storage system;
• an act of mapping each of at least some of the plurality of logical storage locations of the second tier with physical storage locations of the second underlying storage systems;
• an act of exposing a first tier of the volume to the file system, the first tier including a plurality of logical storage locations that have or are to have traits consistent with the first set of traits of the first storage system;
• and
• an act of exposing a second tier of the volume to the file system, the second tier including a plurality of logical storage locations that have or are to have traits consistent with the second set of traits of the second storage system.

A computer program product comprising one or more computer-readable storage media having thereon one or more computer-executable instructions that, when executed by one or more processors of a computing system, cause the computing system to perform a method for exposing up a volume to the file system using at least some of a plurality of underlying storage systems including at least a first storage system that exposes first storage that has a first set of traits to the file system and a second storage system that exposes second storage that has a second set of traits to the file system, the method comprising:

• an act of mapping each of at least some of the plurality of logical storage locations of the first tier with physical storage locations of the first underlying storage system;
• an act of mapping each of at least some of the plurality of logical storage locations of the second tier with physical storage locations of the second underlying storage systems;
• an act of exposing a first tier of the volume to the file system, the first tier including a plurality of logical storage locations that have or are to have traits consistent with the first set of traits of the first storage system;
• and
• an act of exposing a second tier of the volume to the file system, the second tier including a plurality of logical storage locations that have or are to have traits consistent with the second set of traits of the second storage system.