uk(4)

uk4

Scsi user-level driver

Usage

uk* at scsibus?

Overview

The uk driver provides support for a process to address devices on the SCSI bus for which there is no configured driver.

A SCSI adapter must also be separately configured into the system before this driver makes sense.

Ioctls

The uk driver has no ioctls of its own but rather acts as a medium for the generic scsi(4) ioctls. These are described in ⟨sys/scsiio.h⟩.

Files

/dev/uk[0-255]

uk{x} is the 'xth' unknown device found.

Diagnostics

All scsi(4) debug ioctls work on uk devices.

Releases

61 releases since OpenBSD 2.1; the text changed 12 times.

  1. 2.1
  2. 2.2–2.3
  3. 2.4–2.5
  4. 2.6–2.9
  5. 3.0–3.1
  6. 3.2–3.3
  7. 3.4
  8. 3.5–3.6
  9. 3.7–4.1
  10. 4.2–4.7
  11. 4.8–5.4
  12. 5.5–7.6
  13. 7.7–8.0

History

The uk driver appeared in NetBSD 1.0.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.