| 摘要 |
PROBLEM TO BE SOLVED: To provide a RAID file system for maintaining the parity consistency even when the write is stopped at any point during the write. SOLUTION: In updating a logical block 5 in stripes constituted by logical blocks 4-6 stored in a distributed manner in physical disks vol. 1, 3 and 6 so as to realize RAID, storage areas for an updated logical block 5new and a parity block 4new newly calculated for the updating are ensured in non-used areas of a disk so as to realize RAID to/from the logical area 6, write is performed therein, and meta data is updated thereafter. COPYRIGHT: (C)2004,JPO
|
