# cryptsetup status home
/dev/mapper/home is active:
  cipher:  aes-cbc-essiv:sha256
  keysize: 256 bits
  device:  /dev/sdb2
  offset:  0 sectors
  size:    417175920 sectors
  mode:    read/write
# cryptsetup status test
/dev/mapper/test is active:
  cipher:  aes-cbc-essiv:sha256
  keysize: 256 bits
  device:  /dev/sdb2
  offset:  0 sectors
  size:    417175920 sectors
  mode:    read/write

# dd_rescue /dev/mapper/home /dev/null
dd_rescue: (info): ipos:     15360.0k, opos:     15360.0k, xferd:     15360.0k
                   errs:      0, errxfer:         0.0k, succxfer:     15360.0k
             +curr.rate:     4205kB/s, avg.rate:     4205kB/s, avg.load: 16.2%

# dd_rescue /dev/mapper/test /dev/null
dd_rescue: (info): ipos:     20480.0k, opos:     20480.0k, xferd:     20480.0k
                   errs:      0, errxfer:         0.0k, succxfer:     20480.0k
             +curr.rate:    17721kB/s, avg.rate:    17721kB/s, avg.load: 18.2%