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man pages section 1M: System Administration Commands Oracle Solaris 11 Information Library |
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man pages section 1M: System Administration Commands Oracle Solaris 11 Information Library |
- SCSI hardware specific commands for cfgadm
/usr/sbin/cfgadm [-f] [-y | -n] [-v] [-o hardware_option]
-c function ap_id.../usr/sbin/cfgadm [-f] [-y | -n] [-v] [-o hardware_option]
-x hardware_function ap_id.../usr/sbin/cfgadm [-v] [-a] [-s listing_option] [-o hardware_option]
[-l [ap_id | ap_type ... ]]/usr/sbin/cfgadm [-v] [-o hardware_option] -t ap_id...
/usr/sbin/cfgadm [-v] [-o hardware_option] -h [ap_id]...
The SCSI hardware specific library /usr/lib/cfgadm/scsi.so.1 provides the functionality for SCSI hot-plugging through the cfgadm(1M) command. cfgadm operates on attachment points, which are locations in the system where hardware resources can be dynamically reconfigured. Refer to cfgadm(1M) for information regarding attachment points.
For SCSI hot-plugging, each SCSI controller is represented by an attachment point in the device tree. In addition, each SCSI device is represented by a dynamic attachment point. Attachment points are named through ap_ids. Two types of ap_ids are defined: logical and physical. The physical ap_id is based on the physical pathname, whereas the logical ap_id is a shorter more user-friendly name. For SCSI controllers, the logical ap_id is usually the corresponding disk controller number. For example, a typical logical ap_id would be c0.
SCSI devices are named relative to the controller ap_id. Thus if a disk device is attached to controller c0, its ap_id can be:
c0::dsk/c0t0d0
where dsk/c0t0d0 identifies the specific device. In general, the device identifier is derived from the corresponding logical link for the device in /dev. For example, a SCSI tape drive logical ap_id could be c0::rmt/0. Here c0 is the logical ap_id for the SCSI controller and rmt/0 is derived from the logical link for the tape drive in /dev/rmt. If an identifier can not be derived from the link in /dev, a unique identifier will be assigned to it. For example, if the tape device has no link in /dev, it can be assigned an ap_id of the form c0::st3 where st3 is a unique internally generated identifier.
When a controller is capable of supporting the Solaris I/O multipathing feature (formerly known as MPxIO or the Sun StorEdge Traffic Manager [STMS]) and is enabled, the controller provides a path to a scsi_vhci(7D) multipath device. If a device attached to such controller is supported by scsi_vhci(7D) its ap_id can be:
c0::0,0
...where 0,0 uniquely identifies the target and logical unit information. The Type field for a path of such ap_ids indicates if it represent a path to the scsi_vhci(7D) multipath devices, along with the type of device that is connected to through the path.
A simple listing of attachment points in the system will include attachment points at SCSI controllers but not SCSI devices. Use the -a flag to the list option (-l) to list SCSI devices as well. For example:
# cfgadm -l Ap_Id Type Receptacle Occupant Condition c0 scsi-bus connected configured unknown sysctrl0:slot0 cpu/mem connected configured ok sysctrl0:slot1 sbus-upa connected configured ok
To list SCSI devices in addition to SCSI controllers:
# cfgadm -al Ap_Id Type Receptacle Occupant Condition c0 scsi-bus connected configured unknown c0::dsk/c0t14d0 disk connected configured unknown c0::dsk/c0t11d0 disk connected configured unknown c0::dsk/c0t8d0 disk connected configured unknown c0::dsk/c0t0d0 disk connected configured unknown c0::rmt/0 tape connected configured unknown sysctrl0:slot0 cpu/mem connected configured ok sysctrl0:slot1 sbus-upa connected configured ok
If the controller c0 was enabled with Solaris I/O multipathing and the connected disk and tape devices are supported by Solaris I/O multipathing the output would be:
# cfgadm -al Ap_Id Type Receptacle Occupant Condition c0 scsi-bus connected configured unknown c0::11,0 disk-path connected configured unknown c0::14,0 disk-path connected configured unknown c0::8,0 disk-path connected configured unknown c0::0,0 disk-path connected configured unknown c0::a.0 tape-path connected configured unknown sysctrl0:slot0 cpu/mem connected configured ok sysctrl0:slot1 sbus-upa connected configured ok
Refer to cfgadm(1M) for more information regarding listing attachment points. The receptacle and occupant state for attachment points at the SCSI controller have the following meanings:
not applicable
bus quiesced (I/O activity on bus is suspended)
bus active
one or more devices on the bus is configured
no device on the bus is configured
The corresponding states for individual SCSI devices are:
not applicable
bus to which the device is attached is quiesced
bus to which device is attached is active
device or path to a multipath SCSI device is configured
device or path to a multipath SCSI device is not configured
cfgadm defines several types of operations besides listing (-l).These operations include testing, (-t), invoking configuration state changes, (-c), invoking hardware specific functions (-x), and obtaining configuration administration help messages (-h).
The following generic commands are defined for the SCSI hardware specific library:
For SCSI controller attachment points, the following configuration state change operations are supported:
Unquiesce the SCSI bus.
Quiesce the bus (suspend I/O activity on bus).
Incorrect use of this command can cause the system to hang. See NOTES.
Configure new devices on SCSI bus.
Unconfigure all devices connected to bus.
The following generic commands are defined for SCSI devices and for paths to multipath SCSI devices:
Configure a specific device or a specific path to a multipath SCSI device.
Unconfigure a specific device or a specific path to a multipath SCSI device.
When used with the disconnect command, forces a quiesce of the SCSI bus, if supported by hardware.
Incorrect use of this command can cause the system to hang. See NOTES.
SCSI specific help can be obtained by using the help option with any SCSI attachment point.
No hardware specific options are currently defined.
Attachment points of class scsi can be listed by using the select sub-option. Refer to the cfgadm(1M) man page for additional information.
No test commands are available at present.
Some of the following commands can only be used with SCSI controllers and some only with SCSI devices.
In the following, controller_ap_id refers to an ap_id for a SCSI controller, for example, c0. device_ap_id refers to an ap_id for a SCSI device, for example: c0::dsk/c0dt3d0.
The following hardware specific functions are defined:
Add a new device to the SCSI controller, controller_ap_id.
This command is intended for interactive use only.
Remove device device_ap_id.
This command is intended for interactive use only.
Remove device device_ap_id and replace it with another device of the same kind.
This command is intended for interactive use only.
Reset device_ap_id.
Reset bus controller_ap_id without resetting any devices attached to the bus.
Reset bus controller_ap_id and all devices on the bus.
Sets or gets the hard disk locator LED, if it is provided by the platform. If the [on|off] suboption is not set, the state of the hard disk locator is printed.
If no sub-arguments are set, this function print a list of the current LED settings. If sub-arguments are set, this function sets the mode of a specific LED for a slot.
Example 1 Configuring a Disk
The following command configures a disk attached to controller c0:
# cfgadm -c configure c0::dsk/c0t3d0
Example 2 Unconfiguring a Disk
The following command unconfigures a disk attached to controller c0:
# cfgadm -c unconfigure c0::dsk/c0t3d0
Example 3 Adding a New Device
The following command adds a new device to controller c0:
# cfgadm -x insert_device c0
The system responds with the following:
Adding device to SCSI HBA: /devices/sbus@1f,0/SUNW,fas@e,8800000 This operation will suspend activity on SCSI bus c0 Continue (yes/no)?
Enter:
y
The system responds with the following:
SCSI bus quiesced successfully. It is now safe to proceed with hotplug operation. Enter y if operation is complete or n to abort (yes/no)?
Enter:
y
Example 4 Replacing a Device
The following command replaces a device attached to controller c0:
# cfgadm -x replace_device c0::dsk/c0t3d0
The system responds with the following:
Replacing SCSI device: /devices/sbus@1f,0/SUNW,fas@e,8800000/sd@3,0 This operation will suspend activity on SCSI bus: c0 Continue (yes/no)?
Enter:
y
The system responds with the following:
SCSI bus quiesced successfully. It is now safe to proceed with hotplug operation. Enter y if operation is complete or n to abort (yes/no)?
Enter:
y
Example 5 Encountering a Mounted File System While Unconfiguring a Disk
The following command illustrates encountering a mounted file system while unconfiguring a disk:
# cfgadm -c unconfigure c1::dsk/c1t0d0
The system responds with the following:
cfgadm: Component system is busy, try again: failed to offline:
/devices/pci@1f,4000/scsi@3,1/sd@1,0
Resource Information
------------------ --------------------------
/dev/dsk/c1t0d0s0 mounted filesystem "/mnt"Example 6 Displaying the Value of the Locator for a Disk
The following command displays the value of the locator for a disk. This example is specific to the SPARC Enterprise Server family:
# cfgadm -x locator c0::dsk/c0t6d0
The system responds with the following:
Disk Led c0t6d0 locator=on
Example 7 Setting the Value of the Locator for a Disk
The following command sets the value of the locator for a disk. This example is specific to the SPARC Enterprise Server family:
# cfgadm -x locator=off c0::dsk/c0t6d0
The system does not print anything in response.
Example 8 Configuring a Path to a Multipath SCSI Disk
The following command configures a path connected through controller c0:
# cfgadm -c configure c0::2,0
Example 9 Unconfiguring a Path to a Multipath SCSI Disk
The following command unconfigures a path connected through controller c0:
# cfgadm -c unconfigure c0::2,0
hardware-specific library for generic SCSI hot-plugging
platform-specific library for generic SCSI hot-plugging
See attributes(5) for descriptions of the following attributes:
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cfgadm(1M), luxadm(1M), config_admin(3CFGADM), libcfgadm(3LIB), attributes(5), scsi_vhci(7D)
The disconnect (quiesce) operation is not supported on controllers which control disks containing critical partitions such as root (/), /usr, swap, or /var. The disconnect operation should not be attempted on such controllers. Incorrect usage can result in a system hang and require a reboot.
When a controller is in the disconnected (quiesced) state, there is a potential for deadlocks occurring in the system. The disconnect operation should be used with caution. A controller should be kept in the disconnected state for the minimum period of time required to accomplish the DR operation. The disconnect command is provided only to allow the replacement of the SCSI cables while the system is running. It should not be used for any other purpose. The only fix for a deadlock (if it occurs) is to reboot the system.
Hotplugging operations are not supported by all SCSI controllers.
The connectors on some SCSI devices do not conform to SCSI hotplug specifications. Performing hotplug operations on such devices can cause damage to the hardware on the SCSI bus. Refer to your hardware manual for additional information.
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