Google Inc.

Jung-Ik Lee

Grant Grundler

A method includes transmitting, by a processor to an I/O controller, a write-distribute command. The command includes a single copy of data and instructions to write instances of the data to multiple storage locations within a group of storage mediums. For each individual location of the multiple storage locations, the I/O controller transmits a write complete message to the processor after writing an instance of the data to the individual location is complete. If writing the instance of the data to a particular location has an error, the write complete message for the particular individual location is a write error message.

Error-handling for write-distribute command in raid mirroring

According to one general aspect, a method may include receiving, from a processor at an I/O controller, a write-distribute command that includes an indication of data to be written to a group of storage mediums and instructions that the data should be written to multiple storage locations within the group of storage mediums. In various embodiments, the method may also include, based on the command's instructions, writing the data to at least a first storage location of the storage mediums. In one embodiment, the method may include returning a write completion message, from the I/O controller to the processor, after the data is written to a first storage location.

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Tumwater, WA, United States of America

Jung-Ik Lee