# MinIO Storage Class Quickstart Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

MinIO server supports storage class in erasure coding mode. This allows configurable data and parity drives per object.

This page is intended as a summary of MinIO Erasure Coding. For a more complete explanation, see <https://docs.min.io/community/minio-object-store/operations/concepts/erasure-coding.html>.

## Overview

/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.common;

import org.elasticsearch.common.time.DateFormatter;

	}

	ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
	if ret.Mode.Valid() {
		switch ret.Mode {
		case objectlock.RetCompliance:
			// In compliance mode, a protected object version can't be overwritten
			// or deleted by any user, including the root user in your AWS account.
			// When an object is locked in compliance mode, its retention mode can't
			// be changed, and its retention period can't be shortened. Compliance mode

                RS_NONE,
                InternalScopeManager.Mode.REMOVE,
                Collections.emptySet(),
                Collections.emptySet(),
                allDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_COMPILE,
                InternalScopeManager.Mode.ELIMINATE,

                RS_NONE,
                InternalScopeManager.Mode.REMOVE,
                Collections.emptySet(),
                Collections.emptySet(),
                allDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_COMPILE,
                InternalScopeManager.Mode.ELIMINATE,

     */
    public static final int ETYPE_ARCFOUR_HMAC = 23;
    /**
     * Kerberos encryption type for AES-128 CTS mode with HMAC-SHA1-96.
     */
    public static final int ETYPE_AES128_CTS_HMAC_SHA1_96 = 17;
    /**
     * Kerberos encryption type for AES-256 CTS mode with HMAC-SHA1-96.
     */
    public static final int ETYPE_AES256_CTS_HMAC_SHA1_96 = 18;

    private int type;
    private byte[] checksum;

    private static boolean assertDefaultDirPermissions(int mode) {
        assert ((mode >> 6) & 07) == 7
        assert ((mode >> 3) & 07) == 5
        assert ((mode >> 0) & 07) == 5
        true
    }

    private static boolean assertDefaultFilePermissions(int mode) {
        assert ((mode >> 6) & 07) == 6
        assert ((mode >> 3) & 07) == 4
        assert ((mode >> 0) & 07) == 4
        true
    }

Name (localhost:user): minioadmin
331 User name ok, password required
Password:
230 Password ok, continue
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls runner/
229 Entering Extended Passive Mode (|||39155|)
150 Opening ASCII mode data connection for file list
drwxrwxrwx 1 nobody nobody            0 Jan  1 00:00 chunkdocs/
drwxrwxrwx 1 nobody nobody            0 Jan  1 00:00 testdir/
...
```

     *
     * @return an {@link Optional} containing the input stream, or empty if not applicable
     */
    @Nonnull
    default Optional<InputStream> stdIn() {
        return Optional.ofNullable(parserRequest().stdIn());
    }

    /**
     * Returns the output stream for the Maven execution, if running in embedded mode.
     *

     */
    @Nonnull
    Optional<Boolean> showVersion();

    /**
     * Indicates whether to run in quiet mode.
     *
     * @return an {@link Optional} containing the boolean flag, or empty if not set
     */
    @Nonnull
    Optional<Boolean> quiet();

    /**
     * Indicates whether to run in verbose mode.
     *
     * @return an {@link Optional} containing the boolean flag, or empty if not set
     */
    @Nonnull