import ( "crypto/internal/fips140" "crypto/internal/fips140deps/byteorder" "errors" ) const ( // size512 is the size, in bytes, of a SHA-512 checksum. size512 = 64 // size224 is the size, in bytes, of a SHA-512/224 checksum. size224 = 28 // size256 is the size, in bytes, of a SHA-512/256 checksum. size256 = 32 // size384 is the size, in bytes, of a SHA-384 checksum. size384 = 48 // blockSize is the block size, in bytes, of the SHA-512/224, // SHA-512/256, SHA-384 and SHA-512 hash functions. blockSize...

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

MinIO protects data against hardware failures and silent data corruption using erasure code and checksums. With the highest level of redundancy, you may lose up to half (N/2) of the total drives and still be able to recover the data.

## What is Erasure Code?

		}
		if err == nil {
			// Verify that checksums of staleDisks
			// match expected values
			for i := range staleWriters {
				if staleWriters[i] == nil {
					continue
				}
				if !bytes.Equal(bitrotWriterSum(staleWriters[i]), bitrotWriterSum(writers[i])) {
					t.Errorf("Test %d: heal returned different bitrot checksums", i)
				}
			}
		}
	}

				Index:      []uint8(nil),
				Checksums:  map[string]string(nil),
			},
		},
		Erasure: ErasureInfo{
			Algorithm:    "ReedSolomon",
			DataBlocks:   6,
			ParityBlocks: 6,
			BlockSize:    1048576,
			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12},
			Checksums:    []ChecksumInfo{{PartNumber: 1, Algorithm: 0x3, Hash: []uint8{}}},
		},

    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(64);
        buffer.append("{enabled=");
        buffer.append(enabled);
        buffer.append(", checksums=");
        buffer.append(checksumPolicy);
        buffer.append(", updates=");
        buffer.append(updatePolicy);
        buffer.append('}');
        return buffer.toString();
    }

		Erasure: ErasureInfo{
			Algorithm:    ReedSolomon.String(),
			DataBlocks:   4,
			ParityBlocks: 2,
			BlockSize:    10000,
			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8},
			Checksums: []ChecksumInfo{{
				PartNumber: 1,
				Algorithm:  HighwayHash256S,
				Hash:       nil,
			}},
		},
		MarkDeleted:      false,
		NumVersions:      1,
		SuccessorModTime: time.Time{},
	}

"crypto/internal/fips140" "crypto/internal/fips140deps/byteorder" "errors" "hash" ) const ( // size512 is the size, in bytes, of a SHA-512 checksum. size512 = 64 // size224 is the size, in bytes, of a SHA-512/224 checksum. size224 = 28 // size256 is the size, in bytes, of a SHA-512/256 checksum. size256 = 32 // size384 is the size, in bytes, of a SHA-384 checksum. size384 = 48 // blockSize is the block size, in bytes, of the SHA-512/224, // SHA-512/256, SHA-384 and SHA-512 hash functions. blockSize...

		}
		if n != test.data {
			t.Fatalf("Test %d: failed to create erasure test file", i)
		}
		for i, w := range writers {
			if w == nil {
				disks[i] = nil
			}
		}

		// Get the checksums of the current part.
		bitrotReaders := make([]io.ReaderAt, len(disks))
		for index, disk := range disks {
			if disk == OfflineDisk {
				continue
			}

		totalFileSize := int64(-1) // For compressed objects length will be unknown (represented by length=-1)
		if length != -1 {
			bitrotSumsTotalSize := ceilFrac(length, shardSize) * int64(h.Size()) // Size used for storing bitrot checksums.
			totalFileSize = bitrotSumsTotalSize + length
		}
		rb.CloseWithError(disk.CreateFile(context.TODO(), origvolume, volume, filePath, totalFileSize, rb))
	}()
	return bw
}

//
// 2. __offline__            - err == errDiskNotFound
//
// 3. __availableWithParts__ - has the latest copy of xl.meta and has all
//                             parts with checksums matching; returned by disksWithAllParts
//
// 4. __outdated__           - returned by outDatedDisk, provided []StorageAPI
//                             returned by diskWithAllParts is passed for latestDisks.