return err
	}

	if n != len(buf) {
		return io.ErrShortWrite
	}

	return nil
}

// checkPart is a light check of an existing and size of a part, without doing a bitrot operation
// For any unexpected error, return checkPartUnknown (zero)
func (s *xlStorage) checkPart(volumeDir, path, dataDir string, partNum int, expectedSize int64, skipAccessCheck bool) (resp int) {

			// parts. This is considered an outdated disk, since
			// it needs healing too.
			verifyResp, verifyErr = onlineDisk.VerifyFile(ctx, bucket, object, meta)
		default:
			verifyResp, verifyErr = onlineDisk.CheckParts(ctx, bucket, object, meta)
		}

		for p := range latestMeta.Parts {
			if verifyErr != nil {
				dataErrsByPart[p][i] = convPartErrToInt(verifyErr)
			} else {
				dataErrsByPart[p][i] = verifyResp.Results[p]

func shufflePartsMetadata(partsMetadata []FileInfo, distribution []int) []FileInfo {
	return shuffleWithDist[FileInfo](partsMetadata, distribution)
}

// shuffleCheckParts - shuffle CheckParts slice depending on the
// erasure distribution.
func shuffleCheckParts(parts []int, distribution []int) []int {
	return shuffleWithDist[int](parts, distribution)
}

		return errors.New("public key authority validation requested but no ca public key specified.")
	}

	cert, ok := clientKey.(*ssh.Certificate)
	if !ok {
		return errSftpPublicKeyWithoutCert
	}

	// ssh.CheckCert called by ssh.Authenticate accepts certificates
	// with empty principles list so we block those in here.
	if len(cert.ValidPrincipals) == 0 {
		return errSftpCertWithoutPrincipals
	}

	checkPartSuccess
	checkPartDiskNotFound
	checkPartVolumeNotFound
	checkPartFileNotFound
	checkPartFileCorrupt
)

// CheckPartsResp is a response of the storage CheckParts and VerifyFile APIs
type CheckPartsResp struct {
	Results []int `msg:"r"`
}

// LocalDiskIDs - GetLocalIDs response.
type LocalDiskIDs struct {
	IDs []string `msg:"i"`
}