Computing system having a system node that utilizes both a logic

Details Computing system having a system node that utilizes both a logic Computing system having a system node that utilizes both a logic

1997-05-29

1999-11-09

Thai, Tuan V.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711111, 711151, 711171, G06F 1200, G06F 1300

Patent

active

059833165

ABSTRACT:
A computing system includes a storage pool and a system node. The storage pool has a plurality of physical volumes. The physical volumes are grouped into a plurality of physical volume groups. The system node accesses the storage pool. The system node includes a logical volume manager and a resource monitor. The logical volume manager maps the physical volumes into logical volumes. The resource monitor determines which physical volumes in the storage pool have available physical links, and determines a number of copies of data within a first logical volume. The resource monitor also determine whether at least one copy of all data within a logical volume group is available. The resource monitor indicates that at least one copy of all data within the logical volume group is available when physical links to all physical volumes for the logical volume group are up. The resource monitor indicates that at least one copy of all data within the logical volume group is available when a number of physical links which are down is less than a number of physical volume groups which contain a fill copy of data for the logical volume group. The resource monitor indicates that there is not available a copy of all data within the logical volume group when there are no physical links to physical volumes for the logical volume group which are up.

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