/dev/mapper/dm-crypto-luks1 is active and is in use.
  type:    LUKS1
  cipher:  aes-xts-plain64
  keysize: 512 bits
  key location: dm-crypt
  device:  /dev/sdc1
  sector size:  512
  offset:  4096 sectors
  size:    8382464 sectors
  mode:    read/write