Queued:    time.Now(),
				SetIndex:  er.setIndex,
				PoolIndex: er.poolIndex,
			})
		}
	}()

	validResp := 0
	totalResp := 0

	// minDisks value is only to reduce the number of calls
	// to the disks; this value is not accurate because we do
	// not know the storage class of the object yet
	minDisks := 0
	if p := globalStorageClass.GetParityForSC(""); p > -1 {
		minDisks = er.setDriveCount - p

	minCompressibleSize = 4096
)

// setHeadGetRespHeaders - set any requested parameters as response headers.
func setHeadGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {
	for k, v := range reqParams {
		if header, ok := supportedHeadGetReqParams[strings.ToLower(k)]; ok {
			w.Header()[header] = []string{strings.Join(v, ",")}
		}
	}
}

	if rangeHeader := r.Header.Get(xhttp.AmzCopySourceRange); rangeHeader != "" {
		rs, parseRangeErr = parseCopyPartRangeSpec(rangeHeader)
	} else {
		// This check is to see if client specified a header but the value
		// is empty for 'x-amz-copy-source-range'
		_, ok := r.Header[xhttp.AmzCopySourceRange]
		if ok {
			parseRangeErr = errInvalidRange
		}
	}

	checkCopyPartPrecondFn := func(o ObjectInfo) bool {