// Header indicates if the etag should be preserved by client
	MinIOSourceETag = "x-minio-source-etag"

	// Writes expected write quorum
	MinIOWriteQuorum = "x-minio-write-quorum"

	// Reads expected read quorum
	MinIOReadQuorum = "x-minio-read-quorum"

	// Indicates if we are using default storage class and there was problem loading config
	// if this header is set to "true"

| Minimum number of drives per server when server count is 4      | 01            |
| Maximum number of drives per server                             | no-limit      |
| Read quorum                                                     | N/2           |
| Write quorum                                                    | N/2+1         |

## Limits of S3 API

		return fi, nil, errErasureReadQuorum
	}

	if writeQuorum < 0 {
		return fi, nil, errErasureWriteQuorum
	}

	quorum := readQuorum
	if write {
		quorum = writeQuorum
	}

	// List all online disks.
	_, modTime, etag := listOnlineDisks(storageDisks, partsMetadata, errs, quorum)

	if write {
		err = reduceWriteQuorumErrs(ctx, errs, objectOpIgnoredErrs, writeQuorum)
	} else {

sleep 1m

docker system prune -f || true
docker volume prune -f || true
docker volume rm $(docker volume ls -q -f dangling=true) || true

# Stop two nodes, one of each pool, to check that all S3 calls work while quorum is still there
[ "${MODE}" == "pools" ] && docker-compose -f minio-${MODE}.yaml stop minio2
[ "${MODE}" == "pools" ] && docker-compose -f minio-${MODE}.yaml stop minio6

	localDrives := cloneDrives(globalLocalDrivesMap)
	globalLocalDrivesMu.RUnlock()

	quorum := (len(localDrives) / 2)

	buckets = make([]BucketInfo, 0, 32)
	healBuckets := map[string]VolInfo{}

	// lists all unique buckets across drives.
	if err := listAllBuckets(ctx, localDrives, healBuckets, quorum); err != nil {
		return nil, err
	}

	// include deleted buckets in listBuckets output

				t.Errorf("Expected %s, got %s", tt.expectedError, err)
			}
			if tt.expectedReadQuorum != actualReadQuorum {
				t.Errorf("Expected Read Quorum %d, got %d", tt.expectedReadQuorum, actualReadQuorum)
			}
			if tt.expectedWriteQuorum != actualWriteQuorum {
				t.Errorf("Expected Write Quorum %d, got %d", tt.expectedWriteQuorum, actualWriteQuorum)
			}
		})
	}
}

		name        string
		input       [][]xlMetaV2ShallowVersion
		quorum      int
		reqVersions int
		want        []xlMetaV2ShallowVersion
	}{
		{
			name: "obj-on-one",
			input: [][]xlMetaV2ShallowVersion{
				0: {vDelMarker, vObj}, // disk 0
				1: {vDelMarker},       // disk 1
				2: {vDelMarker},       // disk 2
			},
			quorum:      2,
			reqVersions: 0,

	if err != nil {
		log.Fatalln(err)
	}

	opts := madmin.HealOpts{
		Recursive: true,                  // recursively heal all objects at 'prefix'
		Remove:    true,                  // remove content that has lost quorum and not recoverable
		ScanMode:  madmin.HealNormalScan, // by default do not do 'deep' scanning
	}

	start, _, err := madmClnt.Heal(context.Background(), "healing-rewrite-bucket", "", opts, "", false, false)
	if err != nil {

- Write and Read quorum are required to be satisfied only across the erasure set for an object. Healing is also done per object within the erasure set which contains the object.

			selected = prefer
			objsAgree++
			continue
		}
	}

	// Return dir entries, if enough...
	if selected != nil && selected.isDir() && dirExists >= r.dirQuorum {
		return selected, true
	}

	// If we would never be able to reach read quorum.
	if objsValid < r.objQuorum {
		return nil, false
	}

	// If all objects agree.
	if selected != nil && objsAgree == objsValid {
		return selected, true