Method for managing logical volume in order to support dynamic online resizing and software raid and to minimize metadata and computer readable medium storing the same
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United States of America Patent
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Apr 6, 2004
Grant Date -
Jan 30, 2003
app pub date -
Dec 7, 2001
filing date -
Jul 27, 2001
priority date (Note) -
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Abstract
A method for managing a logical volume for minimizing a size of metadata and supporting dynamic online resizing and software redundant array of independent disks (RAID), and a computer-readable recording medium storing instructions for embodying the method, are disclosed. The method includes the metadata having a disk partition table containing information of a disk partition in which the metadata is stored; a logical volume table for maintaining the information of the logical volume by storing duplicated information of the logical volume onto all disk partitions of the logical volume; an extent allocation table for indicating whether each extent in the disk partitions is used or not; and a mapping table for maintaining a mapping information for a physical address space corresponding to a logical address space which is a continuous address space equal in size of storage space of whole logical volume.
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