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Archived content

NOTE: this is an archived page and the content is likely to be out of date.

Enhanced data reliability - Disk drive patrol

ETERNUS disk storage systems data are protected via a disk drive patrol function. An internal controller regularly checks the disk drives, in background, to detect errors and write failures. This process also ensures that data consistency within the volume group(*Note) is also maintained.

The data on each disk drive is read, and if an error is detected, data is reconstructed using redundant information contained within the volume group. The corrected data is then written to a new valid area on the disk drive.

*Note : The volume group is all the disks in a RAID configuration.

Disk drive patrol

Benefit

Higher data reliability as data errors are quickly found and corrected (by reconstruction) and disk write failures are avoided.

Product Requirements

Supported Storage	Disk Storage Systems	ETERNUS DX60 S3 ETERNUS DX100 S3/DX200 S3 ETERNUS DX500 S3/DX600 S3 ETERNUS DX8700 S3/DX8900 S3 ETERNUS DX60/DX60 S2 ETRENUS DX80/DX80 S2 ETERNUS DX90/DX90 S2 ETERNUS DX400/DX400 S2 series ETERNUS DX8000 series/DX8700 S2 ETERNUS4000/ETERNUS8000
Supported Storage	All-Flash Arrays	ETERNUS DX200F