| LD(4) | Device Drivers Manual | LD(4) | 
ld* at aac? unit ?
ld* at amr? unit ?
ld* at ataraid? vendtype ? unit ?
ld* at cac? unit ?
ld* at icp? unit ?
ld* at iop? tid ?
ld* at mlx? unit ?
ld* at nvme? nsid ?
ld* at sdmmc?
ld* at twa? unit ?
ld* at twe? unit ?
ld* at virtio?
The ld driver provides support for simple block devices,
  usually presented by a disk array controller.
  - /dev/ldup
- block mode disk unit u, partition
      p
- /dev/rldup
- raw mode disk unit u, partition
      p
aac(4),
  amr(4),
  cac(4),
  icp(4),
  intro(4),
  iop(4),
  mlx(4),
  nvme(4),
  sdmmc(4),
  twa(4),
  twe(4),
  virtio(4)
Theld driver first appeared in NetBSD
  1.5.3.
The capacity and geometry of units as accessed through the
  ld driver may be different than when accessed through
  some other medium (e.g. SCSI).