Abstract: A file level striping method adds an option for indicating whether or not to support file level striping to a file creation interface in a file system, extends an inode structure to include a last disk ID field, initializes the last disk ID when the file is created in the file system, allocates a physical block based on the last disk ID when the physical block allocation is requested at the time of file I/O request in the file system, and modifies the last disk ID value to reflect the physical block allocation made by a volume manager. An apparatus using the file level striping method includes a number of disks for storing information actually, the volume manager for logically grouping a number of disks and a file system for creating files on said logical volume and performing I/O operations.

Abstract: A clustering apparatus and method for content delivery system are provided. The clustering apparatus includes: a local server for performing operations as a dedicated server providing a stream service by being connected to a cluster; and a file management server for storing original contents.

Abstract: A system having RAID levels includes a storage medium, a memory and a CPU. The storage medium has at least two disks. The memory stores a striping zone information table of total disks in which a physical address of data recorded in a disk of the storage medium is converted into a logic address. The CPU modifies a striping zone information table stored in the memory in case a new disk is added to the storage medium, stores the modified striping zone information table in the memory, converts a logic address of data to be written/read out from the stored table into a physical address in response to the disk writing/reading instructions, searches positions of a corresponding disk D and a physical block B and controls writing or reading out data.

Abstract: A file level striping method adds an option for indicating whether or not to support file level striping to a file creation interface in a file system, extends an inode structure to include a last disk ID field, initializes the last disk ID when the file is created in the file system, allocates a physical block based on the last disk ID when the physical block allocation is requested at the time of file I/O request in the file system, and modifies the last disk ID value to reflect the physical block allocation made by a volume manager. An apparatus using the file level striping method includes a number of disks for storing information actually, the volume manager for logically grouping a number of disks and a file system for creating files on said logical volume and performing I/O operations.

Abstract: There is provided a method for reorganizing data in a RAID system using a striping technique. First, it is determined whether an additional disk exists in a storage medium in the system. Then, it is checked whether a data is stored at a reorganization-requested location for a disk write operation reorganization-requested data to the reorganization request location if there exists the additional disk. Thereafter, a if no data is stored in the reorganization-requested location.

Abstract: A RAID subsystem to distributively store data in a disk array having a plurality of disk drives and performing an I/O of the data in parallel is provided. A sparing disk drive stores a recovery image in which recovery information on a block of an error disk drive is recorded. A disk array controller retrieves the recovery information recorded in the recovery image according to a data input/output request of a host computer to check whether the block of the error disk drive is recovered or not. The regenerated block in the block of the sparing disk drive is recorded according to the check result on the block. The recovery information on the regenerated block is recorded in the recovery image.

Abstract: A system having RAID levels includes a storage medium, a memory and a CPU. The storage medium has at least two disks. The memory stores a striping zone information table of total disks in which a physical address of data recorded in a disk of the storage medium is converted into a logic address. The CPU modifies a striping zone information table stored in the memory in case a new disk is added to the storage medium, stores the modified striping zone information table in the memory, converts a logic address of data to be written/read out from the stored table into a physical address in response to the disk writing/reading instructions, searches positions of a corresponding disk D and a physical block B and controls writing or reading out data.