| 摘要 |
Disclosed are a method and system for a storage controller to manage the allocation of emulated storage devices to physical storage segments. The space within the emulated devices is identified by a logical address. The storage controller is in communication with at least one host device and at least one physical storage device. A plurality of tables, each having entry spaces to store segment identification or segment table and entry identification, is established in the storage controller. The tables define a tree structure by which a segment to be accessed is identified by mapping a logical address through the tables to a segment identification. The number of tables, the number of pages in each table, and the number of entries in each page are selected to optimize the amount of space in the storage controller required by the tables and to ensure that the segments may be allocated in any proportion among the emulated storage devices, including all of the segments being allocated to a single emulated device. Moreover, the allocation of segments to emulated storage space is dynamic by changing the contents of the tables.
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