Patent ID: 9594508
Date: 2017-03-14
CPC Classifications: G06F

Claim:
1. A computer system comprising: a tiered block storage system comprising a tiered block storage device and a storage controller; and a host device configured to access the tiered block storage system, wherein: the tiered block storage device comprises plural types of storage devices of different access response performances, the storage devices being allocated to respective tiers corresponding to the access response performances of the storage devices, at least a part of each storage area of at least two of the storage devices being allocated to a logical disk comprising a plurality of blocks of a first size, the logical disk being used to store files used by the host device; the storage controller comprises a mode switching unit, a data input/output controller and a data arrangement controller; and the host device comprises a file system, a rule input unit, a tier arrangement instructing unit and a file designating unit,