STORAGE DEVICE SYSTEM

摘要

In a storage device system having a plurality of memory modules including a non-volatile memory, improved reliability and a longer life or the like is to be realized. To this end, a plurality of memory modules (STG) notifies a control circuit DKCTL0 of a write data volume (Wstg) that is actually written in an internal non-volatile memory thereof. The control circuit DKCTL0 finds a predicted write data volume (eWd) for each memory module on the basis of the write data volume (Wstg), a write data volume (Wh2d) involved in a write command that is already issued to the plurality of memory modules, and a write data volume (ntW) involved in a next write command. Then, a next write command is issued to the memory module having the smallest predicted write data volume.

主权项

1. A storage device system comprising:
a plurality of memory modules; and a first control circuit for controlling the plurality of memory modules; wherein each memory module of the plurality of memory modules has a plurality of non-volatile memories and a second control circuit for controlling the non-volatile memories, the second control circuit grasps a second write data volume with which writing is actually performed to the plurality of non-volatile memories, and notifies the first control circuit of the second write data volume, and the first control circuit grasps a first write data volume involved in a write command that is already issued to the plurality of memory modules, for each memory module of the plurality of memory modules, then calculates a first ratio that is a ratio of the first write data volume to the second write data volume, for each memory module of the plurality of memory modules, and selects a memory module to which a next write command is to be issued, from among the plurality of memory modules, reflecting a result of the calculation.