HP-UX Reference (11i v2 04/09) - 1M System Administration Commands N-Z (vol 4)

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scsictl(1M) scsictl(1M)

EXAMPLES

To display all the mode parameters, turn

immediate_report on, and redisplay the value of

immediate_report

scsictl -a -m ir=1 -m ir /dev/rdsk/c0t6d0

producing the following output:

immediate_report = 0; queue_depth = 8; immediate_report = 1

The same operation with labels suppressed:

scsictl -aq -m ir=1 -m ir /dev/rdsk/c0t6d0

produces the following output:

0; 8; 1

To clear persistent reservation from a device:

scsictl -p pr_clear key /dev/rdsk/c0t6d0

WARNINGS

Not all devices support all mode parameters and commands listed above. Changing a mode parameter

may have no effect on such a device.

Issuing a command that is not supported by a device can cause an error message to be generated.

scsictl is not supported on sequential-access devices using the tape driver.

The

immediate_report

mode applies to the entire device; the section number of the device argument

is ignored.

To aid recovery, immediate reporting is not used for writes of ﬁle system data structures that are main-

tained by the operating system, writes to a hard disk (but not a magneto-optical device) through the

character-device interface, or writes to regular ﬁles that the user has made synchronous with

O_SYNC or

O_DSYNC (see open (2) and fcntl (2)).

DEPENDENCIES

disc3

When the system is rebooted, the

disc3 driver always resets the value of the immediate_report

mode parameter to off.Ifioctl() or scsictl is used to change the setting of immediate reporting

on a SCSI device, the new value becomes the default setting upon subsequent conﬁguration (e.g., opens)

of this device and retains its value across system or device powerfail recovery. However, on the next sys-

tem reboot, the immediate-report

mode parameter is again reset to the value of the tunable system

parameter,

default_disk_ir. This is set using the kctune (1M) command.

sdisk

ioctl() or scsictl is used to change the setting of immediate reporting on a SCSI device, the new

value becomes the default setting upon subsequent conﬁguration (e.g., opens) of this device until the "last

close" of the device, that is, when neither the system nor any application has the device open (for exam-

ple, unmounting a ﬁle system via umount and then mounting it again via mount (see mount(1M)). On

the next "ﬁrst open", the immediate-report mode parameter is again reset to the value of the tunable

system parameter, default_disk_ir. This is set using the kctune (1M) command.