| 摘要 |
PROBLEM TO BE SOLVED: To access from a host without physically separating any drive in a disk array where a failure has been generated even after a drive where a failure has been generated is replaced with a new disk drive. SOLUTION: When a failure is generated in one of HDDs #0 to #3 configuring a logical unit LU #1, for example, HDD #0, a microprocessor 21 of an array controller 20 makes a spare HDD #4 substitute for the HDD #0. The microprocessor 21 makes a host recognize the region of the HDD #0 as a logical unit LU #2 different from the logical unit LU #1. COPYRIGHT: (C)2007,JPO&INPIT
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