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DESCRIPTION

The following device drivers register with bio for volume management:

The following ioctl calls apply to the bio device:

BIOCLOCATE

Locate a named device and give back a cookie to the application for subsequent ioctl calls. The cookie is used to tunnel further ioctls to the right device.

BIOCINQ

Retrieve number of volumes and physical disks for a specific device.

BIOCDISK

Retrieve detailed information for the specified physical disk. Information returned can include status, size, channel, target, lun, vendor name, serial number, and processor device (ses).

BIOCDISK_NOVOL

Is just the same as BIOCDISK but doesn't require the disks to be in volume sets, so this applies to any physical disk connected to the controller.

Note: this ioctl might not be supported on all hardware.

BIOCVOL

Retrieve detailed information for the specified volume. Information returned can include status, size, RAID level, number of disks, device name association (sd?) and vendor name.

BIOCALARM

Control the alarm beeper on the device. Supported states are: disable alarm, enable alarm, silence alarm, status and test alarm.

Note: These options might not be supported on all hardware.

BIOCBLINK

Blink an LED of the specified physical disk. Supported blink states are: blink LED, unblink LED and blink alarm LED.

Note: This option is only supported if the disk is governed by ses(4) and the hardware supports hardware blinking.

BIOCSETSTATE

Alter the state of specified physical disk. Supported states are: create/remove hot-spare, create/remove pass through disk, start/stop consistency check in a volume, online disk and offline disk.

Note: These options might not be supported on all hardware.

BIOCVOLOPS

For operations in volume sets. It's able to create and remove a volume set in a supported RAID controller.

Note: this ioctl might not be supported on all hardware.