}

// NewAlignedBytePool creates a new pool with the specified size.
func NewAlignedBytePool(sz int) *AlignedBytePool {
	return &AlignedBytePool{size: sz, p: bpool.Pool[*[]byte]{New: func() *[]byte {
		b := disk.AlignedBlock(sz)
		return &b
	}}}
}

// aligned sync.Pool's
var (
	ODirectPoolLarge  = NewAlignedBytePool(LargeBlock)
	ODirectPoolMedium = NewAlignedBytePool(MediumBlock)

	xlStorageFormatFile = "xl.meta"

	// XL metadata file backup file carries previous per object metadata.
	xlStorageFormatFileBackup = "xl.meta.bkp"
)

var alignedBuf []byte

func init() {
	alignedBuf = disk.AlignedBlock(xioutil.DirectioAlignSize)
	_, _ = rand.Read(alignedBuf)
}

// isValidVolname verifies a volname name in accordance with object
// layer requirements.
func isValidVolname(volname string) bool {