How to verify the device boot path for SPARC based boards used in the Sun Netra CT900

Asset ID:	1-71-1019703.1
Update Date:	2009-10-18
Keywords:

Solution Type Technical Instruction Sure

Solution 1019703.1 : How to verify the device boot path for SPARC based boards used in the Sun Netra CT900

Related Items


Sun Netra CP3060 ATCA Blade Server
 Sun Netra CT900 Server
 Sun Netra CP3260 ATCA Blade Server
 Sun Netra CP3010 Blade Server

Related Categories


GCS>Sun Microsystems>Boards>NEBS-Certified Servers
 GCS>Sun Microsystems>Servers>NEBS-Certified Servers

PreviouslyPublishedAs
244186

Description
This document can be used to identify the path to the device that will be used to boot a SPARC based CPU node used in the Sun Netra CT900
Symptoms
Boot device not known
Not booting from correct device
Can't boot
Purpose/Scope
This document is intended to detail the steps necessary to identify the path to the device which will be used to boot the system if no explicit parameter is specified with the boot command. It will focus on checking and setting the device alias.
It is not intended that this document will cover checking the data on the media selected.

Steps to Follow
The device from which the Operating Environment is booted on SPARC based CPU node boards in the Sun Netra CT900 follows the normal selection method as used on other types of SPARC servers and workstations. It is defined by parameters in the OpenBoot PROM (OBP) . It may be defined either as an absolute path through the I/O structure, or by use of a device alias.
The following instructions will give you the steps to follow in order to ensure that the device to be used for booting is correct.

Use the OBP printenv command to verify the boot parameters

Verify whether the system is configured to automatically boot

{0} ok printenv auto-boot?

auto-boot? = false

Verify the device selected by the boot-device parameter is the intended device

{0} ok printenv boot-device

boot-device = /pci@0/pci@0/pci@a/pci@0/usb@4,2/storage@2/disk@0,0:a

In the example above, the boot device is defined by the full path. In most cases the device will be shown as a device alias. To understand the paths defined by the device alias, refer to the tables shown below. These vary according to the type of board being used.

Netra CP3010

Predefined boot device aliases - See output from OBP devalias command

Alias	Path to device	Description of device
net	/pci@1c,600000/network@2	As net0
net5	/pci@1d,700000/ethernet@2,1	Extended Fabric 1
net4	/pci@1d,700000/ethernet@2	Extended Fabric 0
net3	/pci@1e,600000/network@2,1	Management Ethernet B (Front Panel)
net2	/pci@1e,600000/network@2	Management Ethernet A (Front Panel)
net1	/pci@1c,600000/network@2,1	Base Ethernet 1
net0	/pci@1c,600000/network@2	Base Ethernet 0
cdrom	/pci@1e,600000/ide@d/cdrom@0,0:f	Historical - Not used on this board
ide	/pci@1e,600000/ide@d	Compact Flash
disk	/pci@1f,700000/scsi@1/disk@0,0	As disk 0
disk3	/pci@1f,700000/scsi@1/disk@3,0	SAS disk 3 through rear panel connector
disk2	/pci@1f,700000/scsi@1/disk@2,0	SAS disk 2 through rear panel connector
disk1	/pci@1f,700000/scsi@1/disk@1,0	SAS disk 1 through front panel connector
disk0	/pci@1f,700000/scsi@1/disk@0,0	SAS disk 0 through front panel connector

Note: The PMC (Peripheral Mezzanine Card) slots in the front of the Netra CP3010 do not have OBP pre-defined aliases. If these slots are used for disk devices then aliases can be created using the OBP nvalias command.

For reference, the paths to the devices are:

pmcA (upper slot) /pci@1e,600000/ide@4/disk@0,0

pmcB (lower slot) /pci@1e,600000/ide@4/disk@1,0

Netra CP3060

Predefined boot device aliases - See output from OBP devalias command

Alias	Path to device	Description of device
disk2	/pci@780/pci@0/pci@1/pci@0/ide@1f,1/disk@2	Defined for AMC device on RTM but not used with standard RTM
disk1	/pci@780/pci@0/pci@1/pci@0/ide@1f,1/disk@0	AMC Hard Disk (SATA drive) in front AMC slot
disk0	/pci@780/pci@0/pci@1/pci@0/ide@1f/disk@0	Compact Flash
disk	/pci@780/pci@0/pci@1/pci@0/ide@1f/disk@0	As disk0
ide	/pci@780/pci@0/pci@1/pci@0/ide@1f,1	IDE controller
net1	/pci@780/pci@0/pci@2/network@0,1	* Base Ethernet 1 Management Ethernet B
net0	/pci@780/pci@0/pci@2/network@0	*Base Ethernet 0 Management Ethernet A
net	/pci@780/pci@0/pci@2/network@0	As net0

* Note: that the Base and Management networks share an interface. This is accomplished by the presence of a layer 2 switch chip for each interface. To access each of the networks, you will need to provide a logical IP address for the second network on each of the NICs.

Netra CP3260

Predefined boot device aliases - See output from OBP devalias command

Alias	Path to device	Description of device
net5	/pci@0/pci@0/pci@2/network@0,1	ARTM Ethernet 1
net4	/pci@0/pci@0/pci@2/network@0	ARTM Ethernet 0
net3	/pci@0/pci@0/pci@9/network@0,1	Management port - ARTM
net2	/pci@0/pci@0/pci@9/network@0	Management port - Front Panel
net1	/pci@0/pci@0/pci@1/network@0,1	Base Network to switch in slot 8
net0	/pci@0/pci@0/pci@1/network@0	Base Network to switch in slot 7
net	/pci@0/pci@0/pci@1/network@0	As net0
disk	/pci@0/pci@0/pci@a/pci@0/usb@4,2/storage@2/disk	Compact Flash

Note 1: There are no pre-defined network aliases for the Extended Fabric ports. If booting through the Extended Fabric network is required, aliases can be created using the OBP nvalias command.

For reference, the paths to the devices are:

Extended Fabric to Switch slot 7 /niu@80/network@0

Extended Fabric to Switch slot 8 /niu@80/network@1

Note 2: The Netra CP3260 does not have any direct connect Advanced Mezzanine Cards (AMCs) or on-board disk drives. Therefore paths to disk drives will vary according to the type of Advanced Rear Transition Module and type of attached storage device that is installed.

Product
Netra CP3010 Board
Sun Netra CT 900 Server
Sun Netra CP3260 ATCA Blade Server
Sun Netra CP3060 ATCA Blade Server

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normalized, ATCA, Netra, CT900, CP3010, CP3060, CP3260, boot device, devalias, boot

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