Patent ID: 11880278
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A storage administration method, the method comprising
configuring, by a processor, a virtual chunk with k (k is an integer equal to or larger than two) virtual parcels including a virtual parcel having user data and a virtual parcel having element data that is redundant data for repairing user data;
storing, by the processor, the virtual parcels included in a same virtual chunk by mapping the virtual parcels in storage areas of k of mutually different physical storage drives among N (k<N) of a plurality of physical storage drives; and
mapping the virtual parcels such that a maximum value of a numbers of the virtual parcels mapped to particular physical storage drives housed in a same drive enclosure among a plurality of drive enclosures is equal to or smaller than p/r, where redundancy of the virtual chunk is p, and a number of drive enclosures among the plurality of drive enclosures that are able to be active even if a failure occurs is r (r≤p).