ciss(4)

ciss4

Compaq smart array sas/sata/scsi raid controller

Usage

ciss* at pci?

Overview

The ciss driver provides support for Compaq Smart Array SAS/SATA/SCSI RAID controllers, including:

  • Compaq 532, 5300, 5312, 5i

  • Compaq 641, 642, 6400, 6400EM, 6422

  • Hewlett-Packard 6i, E200, E200i, E500, H240, H240ar, H240tr, H241, H244br, P212, P220i, P222, P224br, P230i, P240tr, P246br, P400, P400i, P410, P410i, P411, P420, P420i, P421, P430, P430i, P431, P440, P440ar, P441, P530, P531, P542t, P600, P700m, P711m, P712m, P721m, P731m, P741m, P800, P812, P822, P830, P830i, P840, P841, V100

These controllers support RAID 0, RAID 1, RAID 5, JBOD, and superpositions of those configurations.

Although the controllers are actual RAID controllers, the driver makes them look just like SCSI controllers. All RAID configuration is done through the controllers' BIOSes.

Monitoring status for the volume and drives in it is done through the bioctl(8) utility; the current status is provided by the sysctl(8) variable hw.sensors.

Caveats

For purposes of status monitoring, the current code only supports one logical volume per controller.

Releases

44 releases since OpenBSD 3.8; the text changed 14 times.

  1. 3.8
  2. 3.9
  3. 4.0
  4. 4.1
  5. 4.2–4.3
  6. 4.4
  7. 4.5–4.6
  8. 4.7–5.1
  9. 5.2
  10. 5.3
  11. 5.4
  12. 5.5–5.6
  13. 5.7
  14. 5.8–6.1
  15. 6.2–8.0

History

The ciss driver first appeared in OpenBSD 3.8.

Authors

The ciss driver was written by Michael Shalayeff ⟨[email protected]⟩.

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