US 7,890,796 B2 · Automatic media error correction in a file server

Abstract

File systems possibly impacted by a bad sector in a disk drive are unmounted. Then the disk drive is scanned in order to identify additional bad sectors, and for each identified bad sector, a logical address of the bad sector is re-vectored to a good sector. An attempt is made to restore the data of each bad sector, and then the file system is checked for consistency. If a bad sector cannot be restored, any application relying on the bad sector is aborted. Once the file system is found to be consistent, the file system is remounted. Re-vectored blocks are reverse mapped to identify damaged or repaired directories and files. Damaged or repaired directories and files are reported to a system administrator, and damaged directories or files of a client are reported to the client.

Claims8

Dependent claims

A method of responding to a bad sector media error of a disk drive in a file server, the disk drive having sectors storing logical blocks of a file system, said method comprising:

(a) unmounting the file system;
and then
(b) scanning sectors of the disk drive in order to identify bad sectors;
and for each identified bad sector, re-vectoring a logical address of the bad sector to a good sector;
and then
(c) checking the file system for consistency;
and
(d) once the file system is found to be consistent, remounting the file system;
which further includes reverse mapping of logical block addresses of the bad sectors for identifying files damaged by the bad sectors, and reporting the damaged files to a system administrator.

6 more elements

Dependencies are inferred from the claim text.

Automatic media error correction in a file server

Life of this patent

Automatic media error correction in a file server

Life of this patent

Abstract

Claims8