Emc IP Holding Company LLC

Emc Corporation

Hansi Wu

Ivan Bassov

Ye Zhang

Yaming Kuang

Marc DeSouter

Qi Mao

Kent J Costa

Frankie Wei Fang

Kenny Zhou

Pu Wang

Chuangxian Wei

Weili Huang

A technique for repairing damage to a file system stores compression headers in association with respective extents of in-line compressed data. A repair utility reads contents from the compression headers and applies the contents to repair damaged metadata structures that the file system uses to access the associated extents. In this fashion, the repair utility restores access to compressed data, which would otherwise be lost.

Recovering compressed data to reduce data loss

A technique for verifying the consistency of slice allocation metadata includes accessing, from user space of an operating system running on the data storage apparatus, a set of drivers running in kernel space of the operating system to obtain slice allocation metadata from the set of drivers, and identifying discrepancies in slice allocation metadata returned from the set of drivers on a per-file-system basis.

Verifying the consistency of slice allocation metadata

Growing community of inventors

Shanghai, China

Hansi Wu