RECONSTRUCTIVE ERROR RECOVERY PROCEDURE (ERP) USING RESERVED BUFFER

摘要

In one embodiment, a tape drive includes a reserved data buffer and logic integrated with and/or executable by a processor. The logic is configured to read a data set from a medium and store a first portion of the data set to the reserved data buffer in response to a determination that the first portion of the data set is correctable using C2 error correction code (ECC). The logic is also configured to replace any stored row of a non-C2-correctable portion of the data set stored to the reserved data buffer with a corresponding row of the data set read from the medium in response to a determination that the stored row of the non-C2-correctable portion of the data set has an equal amount or more C1-correctable error therein than the corresponding row of the data set read from the medium.

主权项

1. A tape drive, comprising:
a reserved data buffer and logic integrated with and/or executable by a processor, the logic being configured to:
read a portion of a data set from a medium, the portion of the data set comprising a plurality of rows which form an array;store the portion of the data set to the reserved data buffer in response to a determination that the portion of the data set is correctable using C2 error correction code (ECC);replace any stored row of a non-C2-correctable portion of the data set stored to the reserved data buffer with a corresponding row of a portion of the data set read from the medium in response to a determination that the stored row of the non-C2-correctable portion of the data set has an equal amount or more C1-correctable error therein than the corresponding row of the portion of the data set read from the medium; andreplace any stored row of the non-C2-correctable portion of the data set stored to the reserved data buffer with a corresponding C1-correctable row read from the medium in response to a determination that the corresponding C1-correctable row read from the medium has fewer corrected errors therein than the stored row of the non-C2-correctable portion of the data set stored to the reserved data buffer.