---
name: "umass"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/umass"
---

# umass(4)

USB mass storage support

## NAME

**umass** – USB mass storage support

## SYNOPSIS

**umass\*     at uhub?**

## DESCRIPTION

The **umass** driver provides support for USB mass storage class devices.

## SEE ALSO

[scsi(4)](/scsi/4.md), uhub(4), [usb(4)](/usb/4.md), [disklabel(8)](/disklabel/8.md)

## HISTORY

The **umass** driver first appeared in FreeBSD 4.0. OpenBSD support was added in OpenBSD 2.7.