In addition to providing resiliency improvements, ReFS introduces new features for performance-sensitive and virtualized workloads. This scrubber periodically scans the volume, identifying latent corruptions and proactively triggering a repair of corrupt data. Proactive error correction - in addition to validating data before reads and writes, ReFS introduces a data integrity scanner, known as a scrubber.ReFS keeps the volume online while it handles most non-correctable corruptions, but there are rare cases that require ReFS to take the volume offline. Salvaging data - if a volume becomes corrupted and an alternate copy of the corrupted data doesn't exist, ReFS removes the corrupt data from the namespace. Repair processes are both localized to the area of corruption and performed online, requiring no volume downtime.
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