Back to results
US 8,028,127 B2Granted
Automated on-line capacity expansion method for storage device
AssigneeHitachi, Ltd.
InventorsYoshiki Kano, Manabu Kitamura, Kouji Arai
Life of this patent
Estimating the term…
Abstract
A volume provider unit in a computer system that detects a logical block address of a read or write I/O accessing a logical volume of a storage device from a host. According to the logical block address fetched, a storage domain of the logical volume is dynamically expanded. Moreover, the storage domain of the logical volume is reduced or expanded according to an instruction of logical volume capacity reduction or expansion from a host commander part to a volume server.
Claims7
A control method in a storage system including a plurality of disk devices, the method comprising the steps of:
- managing a plurality of storage areas provided from the plurality of disk devices;
- providing a plurality of logical volumes,
- receiving an instruction to expand a capacity of at least one of the plurality of logical volumes,
- expanding the capacity of the at least one of the plurality of logical volumes, and
- monitoring a capacity of storage areas allocated to the plurality of logical volumes relative to a capacity of the plurality of storage areas,
- wherein, in response to a write request to one of said plurality of logical volumes, at least one of the plurality of storage areas can be allocated thereto.
3 more elements
Dependencies are inferred from the claim text.