// ShardSize - returns actual shared size from erasure blockSize.
func (e ErasureInfo) ShardSize() int64 {
	return ceilFrac(e.BlockSize, int64(e.DataBlocks))
}

// IsValid - tells if erasure info fields are valid.
func (fi FileInfo) IsValid() bool {
	if fi.Deleted {
		// Delete marker has no data, no need to check
		// for erasure coding information
		return true
	}
	dataBlocks := fi.Erasure.DataBlocks

	for i, meta := range partsMetadata {
		if !meta.IsValid() {
			// Since for majority of the cases erasure.Index matches with erasure.Distribution we can
			// consider the offline disks as consistent.
			continue
		}
		if !meta.Deleted {
			if len(meta.Erasure.Distribution) != len(onlineDisks) {
				// Erasure distribution seems to have lesser
				// number of items than number of online disks.
				inconsistent++

	fi.DataDir = mustGetUUID()

	// Initialize erasure metadata.
	for index := range partsMetadata {
		partsMetadata[index] = fi
	}

	// Order disks according to erasure distribution
	var onlineDisks []StorageAPI
	onlineDisks, partsMetadata = shuffleDisksAndPartsMetadata(storageDisks, partsMetadata, fi)

	erasure, err := NewErasure(ctx, fi.Erasure.DataBlocks, fi.Erasure.ParityBlocks, fi.Erasure.BlockSize)
	if err != nil {

			}
		}

		if serverDebugLog {
			console.Debugf(color.Green("healDrive:")+" healing bucket %s content on %s erasure set\n",
				bucket, humanize.Ordinal(er.setIndex+1))
		}

		disks, _, healing := er.getOnlineDisksWithHealingAndInfo(true)
		if len(disks) == healing {
			// All drives in this erasure set were reformatted for some reasons, abort healing and mark it as successful

			return err
		}
	}

	// Prevent parallel erasure set healing
	locker := z.NewNSLock(minioMetaBucket, fmt.Sprintf("new-drive-healing/%d/%d", poolIdx, setIdx))
	lkctx, err := locker.GetLock(ctx, newDiskHealingTimeout)
	if err != nil {
		return fmt.Errorf("Healing of drive '%v' on %s pool, belonging to %s erasure set already in progress: %w",

		Results: make([]int, len(fi.Parts)),
	}

	erasure := fi.Erasure
	for i, part := range fi.Parts {
		checksumInfo := erasure.GetChecksumInfo(part.Number)
		partPath := pathJoin(volumeDir, path, fi.DataDir, fmt.Sprintf("part.%d", part.Number))
		err := s.bitrotVerify(ctx, partPath,
			erasure.ShardFileSize(part.Size),
			checksumInfo.Algorithm,
			checksumInfo.Hash, erasure.ShardSize())

verify-healing: install-race ## verify healing and replacing disks with minio binary
	@echo "Verify healing build with race"
	@(env bash $(PWD)/buildscripts/verify-healing.sh)
	@(env bash $(PWD)/buildscripts/verify-healing-empty-erasure-set.sh)
	@(env bash $(PWD)/buildscripts/heal-inconsistent-versions.sh)

verify-healing-with-root-disks: install-race ## verify healing root disks
	@echo "Verify healing with root drives"

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