NAME¶

virtio_scsi — VirtIO SCSI driver

SYNOPSIS¶

To compile this driver into the kernel, place the following lines in your kernel configuration file:

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

virtio_scsi_load="YES"

DESCRIPTION¶

The virtio_scsi device driver provides support for VirtIO SCSI devices.

LOADER TUNABLES¶

Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

hw.vtscsi.bus_reset_disable

In the initial QEMU release with VirtIO SCSI support, in-flight operations were not aborted when stopping the device, rendering bus reset ineffective. This tunable disables attempts to issue reset bus commands. The default value is 1.

DEBUGGING¶

To enable debugging prints from the virtio_scsi driver, set the

hw.vtscsi.X.debug_level

variable, where X is the adapter number, either in loader.conf(5) or via sysctl(8). The following bits have the described effects:

SEE ALSO¶

virtio(4)

HISTORY¶

The virtio_scsi driver was written by Bryan Venteicher <bryanv@FreeBSD.org>. It first appeared in FreeBSD 10.0.