`scsi_util`

Control SCSI and EIDE devices (QNX)

Syntax:

scsi_util [-n node] [[device] command]...

Options:

-n node

Specify node where the device to be controlled resides (not necessary if a full path is supplied as the optional device argument).

device

The pathname (either full, or basename portion only) of the device to be manipulated.

command

A command to perform on the selected device. For SCSI, and ATAPI or EIDE devices controlled by Fsys.eide, the command may be:

scan: Scan for all devices in /dev (default)
error: Detail on last error logged by the driver for this device
lock: Lock the media in the device
unlock: Unlock the media in the device
start: Start unit (spin up device)
stop: Stop unit (spin down)

and in addition, the following commands are available for SCSI devices only:

'defect [option]'

Display defect list for the device. option may be one of:

Option	Description
`g` or `G`	Display grown defect list
`p` or `P`	Display primary defect list

Both lists are displayed if no option is specified. Note that the defect command and its option must be specified as a single command-line parameter to scsi_util. This can be done by the use of quotes on the command line (shown), or by putting a , or = character between the command defect and the option e.g. defect=g or defect,g.

'density [code]'

Display or change density for a device. The density code is unique for each device type. Refer to the mode parameters for this device type in the SCSI spec. If no option is specified the current density is displayed. Note that the density command, like the defect command, must be specified with its option as a single command-line parameter to scsi_util, by the use of quotes on the command-line (shown) or separating the command from the code with a , or = character instead of a space.

eject

Eject the media from the device

info

Report basic SCSI information i.e. host adapter ID, target ID, LUN ID, and device type.

inquiry

Issue the SCSI inquiry command to the device. For a detailed description of the data returned, refer to the SCSI specification.

'medium [type]'

Display or change medium type for a device. The medium types are unique for each device type. Refer to the mode parameters for the particular device type in the SCSI spec. If no type is specified the current type is displayed. The medium command and the type must be specified as a single command-line option to scsi_util, through use of command-line quoting (shown) or by placing a , or = between the command and the type.

sense

Issue a SCSI mode sense command asking for current values of all mode pages. For a detailed description of the data returned, see the SCSI specification.

The first command must be preceded by a device. For subsequent commands the previous device will be used, or a new device may optionally be specified.

Description:

The scsi_util utility is used to control SCSI devices that require manipulation beyond what is afforded by the standard file utilities. Such devices and read/write optical drives and removable hard disks often must be locked, unlocked, started and stopped by this utility.

Typically the permissions on the device will be such that you will need to be root to run scsi_util.

Examples:

Scan /dev for SCSI devices:

    scsi_util

Stop, unlock, and eject a removable SCSI device /dev/hd1:

    scsi_util /dev/hd1 stop unlock eject

Files:

All output is written to the standard output, except when an ioctl() fails, in which case a diagnostic message is written to standard error.

Exit status:

The scsi_util utility always exits with a status of 0.