pkg crypto/md5, const BlockSize ideal-int
pkg crypto/md5, const Size ideal-int
pkg crypto/md5, func New() hash.Hash
pkg crypto/rand, func Int(io.Reader, *big.Int) (*big.Int, error)
pkg crypto/rand, func Prime(io.Reader, int) (*big.Int, error)
pkg crypto/rand, func Read([]uint8) (int, error)
pkg crypto/rand, var Reader io.Reader
pkg crypto/rc4, func NewCipher([]uint8) (*Cipher, error)
pkg crypto/rc4, method (*Cipher) Reset()

	if !disk.ODirectPlatform {
		return errUnsupportedDisk
	}

	// We know XFS already supports O_DIRECT no need to check.
	if fsType == "XFS" {
		return nil
	}

	// For all other FS pay the price of not using our recommended filesystem.

	// Check if backend is writable and supports O_DIRECT
	uuid := mustGetUUID()
	filePath := pathJoin(s.drivePath, minioMetaTmpDeletedBucket, ".writable-check-"+uuid+".tmp")