RAID Data scrubbing

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with data scrubbing, raid controller may periodically read hard disk drives in raid array , check defective blocks before applications might access them. reduces probability of silent data corruption , data loss due bit-level errors.


in dell poweredge raid environments, feature called patrol read can perform data scrubbing , preventive maintenance.


linux md raid, software raid implementation, makes data consistency checks available , provides automated repairing of detected data inconsistencies. such procedures performed setting weekly cron job. maintenance performed issuing operations check, repair, or idle each of examined md devices. statuses of performed operations, general raid statuses, available.








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