lastPartIndex, _, err := fi.ObjectToPartOffset(ctx, endOffset)
	if err != nil {
		return InvalidRange{startOffset, length, fi.Size}
	}

	var totalBytesRead int64
	erasure, err := NewErasure(ctx, fi.Erasure.DataBlocks, fi.Erasure.ParityBlocks, fi.Erasure.BlockSize)
	if err != nil {
		return toObjectErr(err, bucket, object)
	}

	var healOnce sync.Once

	defer func() {
		if countOnlineDisks(onlineDisks) != len(onlineDisks) {
			er.deleteAll(context.Background(), minioMetaTmpBucket, tmpPart)
		}
	}()

	erasure, err := NewErasure(ctx, fi.Erasure.DataBlocks, fi.Erasure.ParityBlocks, fi.Erasure.BlockSize)
	if err != nil {
		return pi, toObjectErr(err, bucket, object)
	}