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SunOS man pages : luxadm (1)

Maintenance Commands                                   luxadm(1M)

NAME

luxadm - administration program for the Sun Enterprise Net- work Array (SENA), RSM, SPARCstorage Array (SSA) subsystems, and individual Fiber Channel Arbitrated Loop (FC_AL) devices

SYNOPSIS

luxadm [ options ... ] subcommand [ options ... ] enclo- sure [ ,dev ] | pathname ...

DESCRIPTION

The luxadm program is an administrative command that manages the SENA, RSM, SPARCstorage Array subsystems and individual FC_AL devices. luxadm performs a variety of control and query tasks depending on the command line arguments and options used. The command line must contain a subcommand. The command line may also contain options, usually at least one enclosure name or pathname, and other parameters depending on the sub- command. You need specify only as many characters as are required to uniquely identify a subcommand. Specify the device that a subcommand interacts with by entering a pathname. For the SENA subsystem, a disk device or enclosure services controller may instead be specified by entering the World Wide Name (WWN) for the device or a port to the device. The device may also be specified by entering the name of the SENA enclosure, and an optional identifier for the particular device in the enclosure. The individual FC_AL devices may be specified by entering the WWN for the device or a port to the device. Pathname Specify the device or controller by either a complete physi- cal pathname or a complete logical pathname. For SENA, a typical physical pathname for a device is: /devices/sbus@1f,0/SUNW,socal@1,0/sf@0,0/ssd@w2200002037000f96, 0:a,raw or /devices/io-unit@f,e0200000/sbi@0,0/SUNW,socal@2,0/sf@0,0/ssd@34, 0:a,raw For all SENA IBs (Interface Boards) on the system, a logical link to the physical paths is kept in the directory /dev/es. SunOS 5.8 Last change: 29 Jul 1999 1 Maintenance Commands luxadm(1M) An example of a logical link is /dev/es/ses0. The WWN may be used in place of the pathname to select an FC_AL device or SENA subsystem IB. The WWN is a unique 16 hexadecimal digit value that specifies either the port used to access the device or the device itself. A typical WWN value is: 2200002037000f96 See NOTES for more information on the WWN formats. For the SPARCstorage Array controller, a typical physical pathname is: /devices/.../.../SUNW,soc@3,0/SUNW,pln@ axxxxxxx,xxxxxxxx:ctlr whereas, a typical physical pathname for an RSM controller is: /devices/sbus@1f,0/QLGC,isp@1,10000:devctl In order to make it easier to address the SPARCstorage Array or RSM controller, a logical pathname of the form cN is sup- ported, where N is the logical controller number. luxadm uses the cN name to find an entry in the /dev/rdsk directory of a disk that is attached to the SPARCstorage Array or RSM controller. The /dev/rdsk entry is then used to determine the physical name of the SPARCstorage Array or RSM con- troller. For a SPARCstorage Array disk, a typical physical pathname is: /devices/.../.../SUNW,soc@3,0/SUNW, pln@axxxxxxx,xxxxxxxx/ssd@0,0:c,raw and a typical logical pathname is: /dev/rdsk/c1t0d0s2 SunOS 5.8 Last change: 29 Jul 1999 2 Maintenance Commands luxadm(1M) For an RSM a typical physical pathname is: /devices/sbus@1f,0/QLGC,isp@1,10000/sd@8,0:c,raw and a typical logical pathname is: /dev/rdsk/c2t8d0s2 For individual FC_AL devices, a typical physical pathname is: /devices/sbus@3.0/SUNW,socal@d,10000/sf@0,0/ssd@w2200002037049fc3,0:a,raw and a typical logical pathname is: /dev/rdsk/c1t0d0s2 Enclosure For SENA, a device may be identified by its enclosure name and slotname: box_name[,fslot_number] box_name[,rslot_number] box_name is the name of the SENA enclosure, as specified by the enclosure_name subcommand. When used without the optional slot_number parameter, the box_name identifies the SENA subsystem IB. f or r specifies the front or rear slots in the SENA enclo- sure. slot_number specifies the slot number of the device in the SENA enclosure, 0-6 or 0-10. See disks(1M) and devlinks(1M) for additional information on logical names for disks and subsystems.

OPTIONS

The following options are supported by all subcommands: -e Expert mode. This option is not recommended for the novice user. SunOS 5.8 Last change: 29 Jul 1999 3 Maintenance Commands luxadm(1M) -v Verbose mode. Options that are specific to particular subcommands are described with the subcommand in the USAGE section.

OPERANDS

The following operands are supported: enclosure The box_name of the SENA. pathname The logical or physical path of a SENA IB, SPARCstorage Array or RSM controller (cN name) or disk device. pathname can also be the WWN of a SENA IB, SENA disk, or individual FC_AL device.

USAGE

Subcommands display enclosure[,dev]...| pathname... display -p pathname... display -r enclosure[,dev]...| pathname... display -v enclosure[,dev]...| pathname... Displays enclosure or device specific data. Subsystem data consists of enclosure environmental sense information and status for all subsystem dev- ices, including disks. Disk data consists of inquiry, capacity, and confi- guration information. -p Displays performance information for the device or subsystem specified by pathname. This option only applies to subsystems that accumulate per- formance information. -r Displays error information for the FC_AL device specified by the pathname, or, if the path is a SENA, for all devices on the loop. The -r option only applies to SENA subsystems and individual FC_AL devices. -v Displays in verbose mode, including mode sense data. download [ -s ] [ -w WWN ] [ -f filename_path ] enclosure... Download the prom image pointed to by filename_path to SunOS 5.8 Last change: 29 Jul 1999 4 Maintenance Commands luxadm(1M) the SENA subsystem Interface Board unit or the SPARCstorage Array controllers specified by the enclo- sure or pathname. The SPARCstorage Array must be reset in order to use the downloaded code. When the SENA's download is complete, the SENA will be reset and the downloaded code executed. If no filename is specified, the default prom image will be used. The default prom image for the SPARCstorage Array con- troller is in usr/lib/firmware/ssa/ssafirmware. The default prom image for the SENA is in the directory usr/lib/locale/C/LC_MESSAGES and is named ibfirmware. -s Save. The -s option is used to save the down- loaded firmware in the FEPROM. If -s is not specified, the downloaded firmware will not be saved across power cycles. The -s option does not apply to the SPARCstorage Array controller as it always writes the downloaded firmware into the FEPROM. When using the -s option, the down- load subcommand modifies the FEPROM on the sub- system and should be used with caution. -w WWN Change the SPARCstorage Array controller's World Wide Name. WWN is a 12-digit hex number; leading zeros are required. The -w option applies only to the SPARCstorage Array. The new SPARCstorage Array controller's image will have the least significant 6 bytes of the 8-byte World Wide Name modified to WWN. enclosure_name new_name enclosure | pathname Change the enclosure name of the enclosure or enclo- sures specified by the enclosure or pathname. The new name (new_name) must be 16 or less characters. Only alphabetic or numeric characters are acceptable. This subcommand applies only to the SENA. fc_s_download [ -F ] [ -f fcode-file ] Download the fcode contained in the file fcode-file into all the FC/S Sbus Cards. This command is interac- tive and expects user confirmation before downloading the fcode. Use fc_s_download only in single-user mode. Using fc_s_download to update a host adapter while there is I/O activity through that adapter will cause the adapter to reset. Newly updated FCode will not be exe- cuted or visible until a system reboot. SunOS 5.8 Last change: 29 Jul 1999 5 Maintenance Commands luxadm(1M) -f fcode-file When invoked without the -f fcode-file option, the current version of the fcode in each FC/S Sbus card is printed. -F Forcibly downloads the fcode, but the command still expects user confirmation before the down- load. The version of the FC/S Sbus Cards fcode that was released with this version of the Operating System is kept in the directory usr/lib/firmware/fc_s and is named fc_s_fcode. fcal_s_download [ -f fcode-file ] Download the fcode contained in the file fcode-file into all the FC100/S Sbus Cards. This command is interactive and expects user confirmation before down- loading the fcode. Use fcal_s_download only in single-user mode. Using fcal_s_download to update a host adapter while there is I/O activity through that adapter will cause the adapter to reset. Newly updated FCode will not be exe- cuted or visible until a system reboot. -f fcode-file When invoked without the -f option, the current version of the fcode in each FC100/S Sbus card is printed. The version of the FC100/S Sbus Cards fcode that was released with this version of the operating system is kept in the directory usr/lib/firmware/fc_s and is named fcal_s_fcode. fcode_download [-p] [-d dir-name] Locate the installed FC/S, FC100/S, FC100/P, or FC100/2P host bus adapter cards and download the FCode files in dir-name to the appropriate cards. The com- mand determines the correct card for each type of file, and is interactive. User confirmation is required before downloading the FCode to each device. Use fcode_download to load FCode only in single-user mode. Using fcode_download to update a host adapter while there is I/O activity through that adapter causes the adapter to reset. Newly updated FCode will not be executed or visible until a system reboot. -d dir-name Download the FCode files contained in the direc- tory dir-name to the appropriate adapter cards. When invoked without the -d option, the default SunOS 5.8 Last change: 29 Jul 1999 6 Maintenance Commands luxadm(1M) directory usr/lib/firmware/fc_s is used. -p Prints the current version of FCode loaded on each card. No download is performed. inquiry enclosure[,dev ]... | pathname... Display the inquiry information for the selected dev- ice specified by the enclosure or pathname. insert_device [ enclosure,dev... ] Assist the user in the hot insertion of a new device or a chain of new devices. Refer to NOTES for limita- tions on hotplug operations. This subcommand applies only to the SENA, RSM, and individual FC_AL drives. For the SENA, if more than one enclosure has been specified, concurrent hot insertions on multiple busses can be performed. With no arguments to the sub- command, entire enclosures or individual FC_AL drives can be inserted. For the RSM, only one controller can be specified. For the SENA, this subcommand guides the user interactively through the hot insertion steps of a new device or chain of devices. If a list of disks was entered it will ask the user to verify the list of devices to be inserted is correct, at which point the user can continue or quit. It then interactively asks the user to insert the disk(s) or enclosure(s) and then creates and displays the logical pathnames for the devices. For the RSM, the following steps are taken: o Quiesce the bus or buses which support quiescing and unquiescing. o Inform the user that the device can be safely inserted . o Request confirmation from the user that the device has been inserted. o Unquiesce the bus or buses which support quiescing and unquiescing. o Create the logical device name for the new device. led enclosure,dev...| pathname... Display the current state of the LED associated with the disk specified by the enclosure or pathname. This subcommand only applies to subsystems that support this functionality. SunOS 5.8 Last change: 29 Jul 1999 7 Maintenance Commands luxadm(1M) led_blink enclosure,dev...| pathname... Requests the subsystem to start blinking the LED asso- ciated with the disk specified by the enclosure or pathname. This subcommand only applies to subsystems that support this functionality. led_off enclosure,dev...| pathname... Requests the subsystem to disable (turn off) the LED associated with the disk specified by the enclosure or pathname. On a SENA subsystem, this may or may not cause the LED to turn off or stop blinking depending on the state of the SENA subsystem. Refer to the SENA Array Installation and Service Manual (p/n 802-7573). This subcommand only applies to subsystems that sup- port this functionality. led_on pathname... Requests the subsystem to enable (turn on) the LED associated with the disk specified by the pathname. This subcommand only applies to subsystems that sup- port this functionality. power_off [ -F ] enclosure[,dev]... | pathname ... number power_off pathname [ enclosure- port ] ... | controller tray- When a SENA is addressed, this subcommand causes the SENA subsystem to go into the power-save mode. The SENA drives are not available when in the power-save mode. When an Enclosure Services card within the SPARCstorage Array is addressed, the RSM tray is powered down. When a drive in a SENA is addressed the drive is set to the drive off/unmated state. In the drive off/unmated state, the drive is spun down (stopped) and in bypass mode. -F The force option only applies to the SENA. Instructs luxadm to attempt to power off one or more devices even if those devices are being used by this host (and are, therefore, busy). Warning: Powering off a device which has data that is currently being used will cause unpredictable results. Users should attempt to power off the device normally (without -F) first, only resorting to this option when sure of the consequences of overriding normal checks. power_on enclosure[,dev].. Causes the SENA subsystem to go out of the power-save SunOS 5.8 Last change: 29 Jul 1999 8 Maintenance Commands luxadm(1M) mode, when this subcommand is addressed to a SENA. There is no programmatic way to power on the SPARCstorage Array RSM tray. When this subcommand is addressed to a drive the drive is set to its normal start-up state. probe [ -p ] Finds and displays information about all attached SENA subsystems and individual FC_AL devices, including the logical pathname, the WWNs, and enclosure names. This subcommand warns the user if it finds different SENAs with the same enclosure names. -p Includes the physical pathname in the display. qlgc_s_download [ -f fcode-file ] Download the FCode contained in the file fcode-file into all the FC100/P, FC100/2P PCI host adapter cards. This command is interactive and expects user confirma- tion before downloading the FCode to each device. Only use qlgc_s_download in single-user mode. Using qlgc_s_download to update a host adapter while there is I/O activity through that adapter will cause the adapter to reset. Newly updated FCode will not be exe- cuted or visible until a system reboot. -f fcode-file When invoked without the -f option, the current version of the FCode in each FC100/P, FC100/2P PCI card is printed. release pathname Release a reservation held on the specified disk. The pathname should be the physical or logical pathname for the disk. If the pathname is of the SPARCstorage Array controller, then all of the disks in the SPARCstorage Array will be released. This subcommand is included for historical and diag- nostic purposes only. remove_device [ -F ] enclosure[,dev]...| pathname... Assists the user in hot removing a device or a chain of devices. This subcommand can also be used to remove entire enclosures. This subcommand applies to the SENA, RSM, and individual FC_AL drives. Refer to NOTES for limitations on hotplug operations. For the SENA and individual FC_AL devices, this subcommand guides the user through the hot removal of a device or dev- ices. During execution it will ask the user to verify SunOS 5.8 Last change: 29 Jul 1999 9 Maintenance Commands luxadm(1M) the list of devices to be removed is correct, at which point the user can continue or quit. It then prepares the disk(s) or enclosure(s) for removal and interac- tively asks the user to remove the disk(s) or enclosure(s). For the RSM, the steps taken are: o Take the device offline. o Quiesce the bus or buses which support quiescing and unquiescing. o Inform user that the device can be safely removed. o Request confirmation from the user that the dev- ice has been removed. o Unquiesce the bus or buses which support quiesc- ing and unquiescing. o Bring the (now removed) device back online. o Remove the logical device name for the removed device. -F Instructs luxadm to attempt to hot plug one or more devices even if those devices are being used by this host (and are, therefore, busy or reserved), to force the hotplugging operation. Warning: Removal of a device which has data that is currently being used will cause unpredictable results. Users should attempt to hotplug nor- mally (without -F) first, only resorting to this option when sure of the consequences of overrid- ing normal hotplugging checks. replace_device [ -F ] pathname This subcommand applies only to the RSM. Refer to NOTES for limitations on hotplug operations. This sub- command guides the user interactively through the hot replacement of a device. For the RSM, the steps taken are: o Take the device offline. SunOS 5.8 Last change: 29 Jul 1999 10 Maintenance Commands luxadm(1M) o Quiesce the bus or buses which support quiescing and unquiescing. o Inform user that the device can be safely replaced. o Request confirmation from the user that the dev- ice has been replaced. o Unquiesce the bus or buses which support quiesc- ing and unquiescing. o Bring the device back online. -F Instructs luxadm to attempt to hot plug one or more devices even if those devices are busy or reserved, (that is, to force the hotplugging operation). Warning: Removal of a device which has data that is currently being used will cause unpredictable results. Users should attempt to hotplug nor- mally (without -F) first, only resorting to this option when sure of the consequences of overrid- ing normal hotplugging checks. reserve pathname Reserve the specified disk for exclusive use by the issuing host. The pathname used should be the physical or logical pathname for the disk. If the pathname is of the SPARCstorage Array controller, then all of the disks in the SPARCstorage Array will be reserved. This subcommand is included for historical and diag- nostic purposes only. set_boot_dev [ -y ] pathname Set the boot-device variable in the system PROM to the physical device name specified by pathname, which can be a block special device or the pathname of the directory on which the boot file system is mounted. The command normally runs interactively requesting confirmation for setting the default boot-device in the PROM. The -y option can be used to run it non- interactively, in which case no confirmation is requested or required. start [ -t tray-number ] pathname... Spin up the specified disk(s). If pathname specifies SunOS 5.8 Last change: 29 Jul 1999 11 Maintenance Commands luxadm(1M) the SPARCstorage Array controller, this action applies to all disks in the SPARCstorage Array. -t Spin up all disks in the tray specified by tray-number. pathname must specify the SPARCstorage Array controller. stop [ -t tray-number ] pathname... Spin down the specified disk(s). If pathname specifies the SPARCstorage Array controller, this action applies to all disks in the SPARCstorage Array. -t Spin down all disks in the tray specified by tray-number. pathname must specify the SPARCstorage Array controller. SPARCstorage Array Subcommands fast_write [ -s ] -c pathname fast_write [ -s ] -d pathname fast_write [ -s ] -e pathname" 6 Enable or disable the use of the NVRAM to enhance the performance of writes in the SPARCstorage Array. pathname refers to the SPARCstorage Array controller or to an individual disk. -s Cause the SPARCstorage Array to save the change so it will persist across power-cycles. -c Enable fast writes for synchronous writes only. -d Disable fast writes. -e Enable fast writes. nvram_data pathname Display the amount of fast write data in the NVRAM for the specified disk. This command can only be used for an individual disk. perf_statistics -d pathname perf_statistics -e pathname Enable or disable the accumulation of performance statistics for the specified SPARCstorage Array con- troller. The accumulation of performance statistics must be enabled before using the display -p SunOS 5.8 Last change: 29 Jul 1999 12 Maintenance Commands luxadm(1M) subcommand. This subcommand can be issued only to the SPARCstorage Array controller. -d Disable the accumulation of performance statis- tics. -e Enable the accumulation of performance statis- tics. purge pathname Purge any fast write data from NVRAM for one disk, or all disks if the controller is specified. This option should be used with caution, usually only when a drive has failed. sync_cache pathname Flush all outstanding writes for the specified disk from NVRAM to the media. If pathname specifies the controller, this action applies to all disks in the SPARCstorage Array subsystem. Enclosure Services Card Subcommands The env_display and alarm* subcommands apply only to an Enclosure Services Card (SES) in a RSM tray in a SPARCstorage Array. The RSM tray is addressed by using the logical or physical path of the SES device or by specifying the controller followed by the tray number. The controller is addressed by cN or the physical path to the SSA's con- troller. alarm pathname | controller tray_number Display the current state of audible alarm. alarm_off pathname | controller tray_number Disable the audible alarm for this RSM tray. alarm_on pathname | controller tray_number Enable the audible alarm for this RSM tray. alarm_set controller- pathname | controller tray_number [ seconds ]" 6 Set the audible alarm setting to seconds. env_display pathname | controller tray_number Display the environmental information for the speci- fied unit. SENA and Individual FC_AL Drive Expert Mode Subcommands The following subcommands are for expert use only, and are applicable only to the SENA and fiber channel loops. They should only be used by users that are knowledgeable about SunOS 5.8 Last change: 29 Jul 1999 13 Maintenance Commands luxadm(1M) the SENA subsystem and fiber channel loops. If you specify a disk to an expert subcommand that operates on a bus, the subcommand operates on the bus to which the specified disk is attached. -e forcelip enclosure[,dev] ... | pathname..." 6 Force the link to reinitialize, using the Loop Initialization Primitive (LIP) sequence. The enclosure or pathname can specify any device on the loop. Use the pathname to specify a specific path for multiple loop configurations. This is an expert only command and should be used with caution. It will reset all ports on the loop. -e rdls enclosure[,dev] ... | pathname... Read and display the link error status information for all available devices on the loop that contains the device specified by the enclosure or pathname. Other Expert Mode Subcommands See NOTES for limitations of these subcommands. They should only be used by users that are knowledgeable about the sys- tems they are managing. -e bus_getstate pathname Get and display the state of the specified bus. -e bus_quiesce pathname Quiesce the specified bus. -e bus_reset pathname Reset the specified bus only. -e bus_resetall pathname Reset the specified bus and all devices. -e bus_unquiesce pathname Unquiesce the specified bus. the specified device. -e dev_getstate pathname Get and display the state of the specified device. -e dev_reset pathname Reset the specified device. -e offline pathname Take the specified device offline. -e online pathname Put the specified device online. SunOS 5.8 Last change: 29 Jul 1999 14 Maintenance Commands luxadm(1M)

EXAMPLES

Example 1: Displaying all of the SENAs and individual FC_AL devices on a system. The following example finds and displays all of the SENAs and individual FC_AL devices on a system: example% luxadm probe Example 2: Displaying an SSA. The following example displays an SSA: example% luxadm display c1 Example 3: Displaying a SENA. The following example displays a SENA: example% luxadm display /dev/es/ses0 Example 4: Display of two subsystems. The following example displays two subsystems using the enclosure names: example% luxadm display BOB system1 Example 5: Displaying information about the first disk. The following example displays information about the first disk in the front of the enclosure named BOB. Use f to specify the front disks. Use r to specify the rear disks. example% luxadm display BOB,f0 Example 6: Displaying information about a SENA disk, an enclosure, or an individual FC_AL drive. The following example displays information about a SENA disk, an enclosure, or an individuall FC_AL drive with the port WWN of 2200002037001246: example% luxadm display 2200002037001246 Example 7: Characters required to uniquely identify a sub- command. The following example uses only as many characters as are required to uniquely identify a subcommand: SunOS 5.8 Last change: 29 Jul 1999 15 Maintenance Commands luxadm(1M) example% luxadm disp BOB Example 8: Displaying error information. The following example displays error information about the loop that the enclosure BOB is on: example% luxadm display -r BOB Example 9: Downloading new firmware into the Interface Board. The following example downloads new firmware into the Inter- face Board in the enclosure named BOB (using the default path for the file to download): example% luxadm download -s BOB Example 10: Displaying information from the SCSI inquiry command. The following example displays information from the SCSI inquiry command from all individual disks on the system, using only as many characters as necessary to uniquely iden- tify the inquiry subcommand: example% luxadm inq /dev/rdsk/c?t?d?s2 Example 11: Hotplugging. The following example hotplugs a new drive into the first slot in the front of the enclosure named BOB: example% luxadm insert_device BOB,f0 Example 12: Running an expert subcommand. The following example runs an expert subcommand. The sub- command forces a loop initialization on the loop that the enclosure BOB is on: example% luxadm -e forcelip BOB Example 13: Using the expert mode hot plugging subcommands. An example of using the expert mode hot plugging subcommands to hot remove a disk on a SSA follows. See NOTES for hot plugging limitations. The first step reserves the SCSI device so that it can't be accessed by way of its second SCSI bus: SunOS 5.8 Last change: 29 Jul 1999 16 Maintenance Commands luxadm(1M) example# luxadm reserve /dev/rdsk/c1t8d0s2 Example 14: Taking the disk to be removed offline. The next two steps take the disk to be removed offline then quiesce the bus: example# luxadm -e offline /dev/rdsk/c1t8d0s2 example# luxadm -e bus_quiesce /dev/rdsk/c1t8d0s2 Example 15: Unquiescing the bus. The user then removes the disk and continues by unquiescing the bus, putting the disk back online, then unreserving it: example# luxadm -e bus_unquiesce /dev/rdsk/c1t8d0s2 example# luxadm -e online /dev/rdsk/c1t8d0s2 example# luxadm release /dev/rdsk/c1t8d0s2

ENVIRONMENT VARIABLES

See environ(5) for a description of the LANG environment variable that affects the execution of luxadm.

EXIT STATUS

The following exit values are returned: 0 Successful completion. -1 An error occurred.

FILES

usr/lib/firmware/fc_s/fcal_s_fcode usr/lib/firmware/fc_s/fc_s_fcode usr/lib/firmware/ssa/ssafirmware usr/lib/locale/C/LC_MESSAGES/ibfirmware

ATTRIBUTES

See attributes(5) for descriptions of the following attri- butes: usr/sbin ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |_____________________________|_____________________________| | Availability | SUNWluxop | |_____________________________|_____________________________| SunOS 5.8 Last change: 29 Jul 1999 17 Maintenance Commands luxadm(1M)

SEE ALSO

devlinks(1M), disks(1M), ssaadm(1M), attributes(5), environ(5), ses( 7D) SENA Array Installation and Service Manual (p/n 802-7573). RAID Manager 6.1 Installation and Support Guide Answerbook RAID Manager 6.1 User's Guide Answerbook

NOTES

See the SENA Array Installation and Service Manual for addi- tional information on the SENA. Refer to Tutorial for SCSI use of IEEE Company_ID, R. Snively, for additional informa- tion regarding the IEEE extended WWN. See SEE ALSO. Currently, only some device drivers support hot plugging. If hot plugging is attempted on a disk or bus where it is not supported, an error message of the form: luxadm: can't acquire "PATHNAME": No such file or directory will be displayed. You must be careful not to quiesce a bus that contains the root or the /usr filesystems or any swap data. If you do quiesce such a bus a deadlock can result, requiring a system reboot. SunOS 5.8 Last change: 29 Jul 1999 18