perspective(400px);\n    transform: perspective(400px);\n  }\n}\n\n@-webkit-keyframes fadeIn {\n  from {\n    opacity: 0;\n  }\n  to {\n    opacity: 1;\n  }\n}\n\n@keyframes fadeIn {\n  from {\n    opacity: 0;\n  }\n  to {\n    opacity: 1;\n  }\n}\n\n@-webkit-keyframes fadeOut {\n  from {\n    opacity: 1;\n  }\n  to {\n    opacity: 0;\n  }\n}\n\n@keyframes fadeOut {\n  from {\n    opacity: 1;\n  }\n  to {\n    opacity: 0;\n  }\n}\n\n@-webkit-keyframes shake {\n  0% {\n    -webkit-transform: translate(2px, 1px) rotate(0deg);\n...

rotate3d(1,0,0,-5deg)}100%{-webkit-transform:perspective(400px);transform:perspective(400px)}}@-webkit-keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@-webkit-keyframes fadeOut{from{opacity:1}to{opacity:0}}@keyframes fadeOut{from{opacity:1}to{opacity:0}}@-webkit-keyframes shake{0%{-webkit-transform:translate(2px,1px) rotate(0);transform:translate(2px,1px) rotate(0)}10%{-webkit-transform:translate(-1px,-2px) rotate(-2deg);transform:translate(-1px,-2px) rotate(-2deg...

setPositiveNumber","subtract","max","boxModelAdjustment","dimension","box","isBorderBox","styles","computedVal","extra","delta","marginDelta","ceil","getWidthOrHeight","valueIsBorderBox","offsetProp","getClientRects","Tween","easing","cssHooks","opacity","animationIterationCount","aspectRatio","borderImageSlice","columnCount","flexGrow","flexShrink","gridArea","gridColumn","gridColumnEnd","gridColumnStart","gridRow","gridRowEnd","gridRowStart","lineHeight","order","orphans","widows","zIndex","zo...

		},
		config.HelpKV{
			Key:         Optimize,
			Description: `optimize parity calculation for standard storage class, set 'capacity' for capacity optimized (no additional parity)` + defaultHelpPostfix(Optimize),
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         config.Comment,
			Description: config.DefaultComment,
			Optional:    true,
			Type:        "sentence",
		},
	}

)

// GetTotalCapacity gets the total capacity in the cluster.
func GetTotalCapacity(diskInfo []madmin.Disk) (capacity uint64) {
	for _, disk := range diskInfo {
		capacity += disk.TotalSpace
	}
	return
}

// GetTotalUsableCapacity gets the total usable capacity in the cluster.
func GetTotalUsableCapacity(diskInfo []madmin.Disk, s StorageInfo) (capacity uint64) {
	for _, disk := range diskInfo {
		// Ignore invalid.

	if err != nil {
		return err
	}
	sc.Parity = s.Parity
	return nil
}

// MarshalText - marshals storage class string.
func (sc *StorageClass) MarshalText() ([]byte, error) {
	if sc.Parity != 0 {
		return []byte(fmt.Sprintf("%s:%d", schemePrefix, sc.Parity)), nil
	}
	return []byte{}, nil
}

func (sc *StorageClass) String() string {
	if sc.Parity != 0 {

# Erasure code sizing guide

## Toy Setups

Capacity constrained environments, MinIO will work but not recommended for production.

| servers | drives (per node) | stripe_size | parity chosen (default) | tolerance for reads (servers) | tolerance for writes (servers) |
|--------:|------------------:|------------:|------------------------:|------------------------------:|-------------------------------:|

	occMap := make(map[int]int)
	for _, p := range parities {
		occMap[p]++
	}

	var maxOcc, cparity int
	for parity, occ := range occMap {
		if parity == -1 {
			// Ignore non defined parity
			continue
		}

		readQuorum := N - parity
		if defaultParityCount > 0 && parity == 0 {
			// In this case, parity == 0 implies that this object version is a
			// delete marker
			readQuorum = N/2 + 1
		}

setPositiveNumber","subtract","max","boxModelAdjustment","dimension","box","isBorderBox","styles","computedVal","extra","delta","marginDelta","ceil","getWidthOrHeight","valueIsBorderBox","offsetProp","getClientRects","Tween","easing","cssHooks","opacity","animationIterationCount","aspectRatio","borderImageSlice","columnCount","flexGrow","flexShrink","gridArea","gridColumn","gridColumnEnd","gridColumnStart","gridRow","gridRowEnd","gridRowStart","lineHeight","order","orphans","widows","zIndex","zo...

of common SLA here original cluster had 1024 drives with 16 drives per erasure set with default parity of '4', second pool is expected to have a minimum of 8 drives per erasure set to match the original cluster SLA (parity count) of '4'. '12' drives stripe per erasure set in the second pool satisfies the original pool's parity count.

Refer to the sizing guide with details on the default parity count chosen for different erasure stripe sizes [here](https://github.com/minio/minio/blob/mas...