The boot PROM is used to boot a SPARC based system and to modify boot parameters such as the boot device or the default boot file or kernel. You also use the boot PROM if you want to run hardware diagnostics before bringing the system to a multiuser state.
For a complete list of PROM commands, see the eeprom(8) man page.
To access the boot PROM, bring the system to run level 0. The system then displays the ok prompt.
$ init 0 ok
The next sections show tasks you can perform after you have accessed the ok prompt.
To display the PROM revision number, type the following command:
ok banner
To obtain information about the default boot device, type the following command:
ok printenv boot-device
If the boot device is local, the output format would be similar to the following example:
boot-device = /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@0,0:a
If the boot device is network based, the output format would resemble the following example:
boot-device = /sbus@1f,0/SUNW,fas@e,8800000/sd@a,0:a \ /sbus@1f,0/SUNW,fas@e,8800000/sd@0,0:a disk net
Identifying the system's devices helps you determine the appropriate devices from which to boot. To view the probe commands that are available on your system, use the sifting probe command.
Before You Begin
Ensure that your role has the appropriate rights profiles to perform this procedure. See Using Rights Profiles to Administer Boot Features.
ok setenv auto-boot? false
ok reset-all
ok probe-device
Alternatively, you can also use the devalias command to identify the device aliases and the associated paths that might be connected to the system.
ok setenv auto-boot? true auto-boot? = true
ok reset-all
The following example shows how to identify the devices connected to a system.
ok setenv auto-boot? false
auto-boot? = false
ok reset-all
.
.
ok probe-ide
Device 0 ( Primary Master )
Removable ATAPI Model: MATSHITACD-RW CW-8124
Device 1 ( Primary Slave )
Not Present
Device 2 ( Secondary Master )
Not Present
Device 3 ( Secondary Slave )
Not Present
ok setenv auto-boot? true
auto-boot? = true
ok reset-all
Example 14 Displaying Device Aliases
This example shows a sample output of the devalias command.
ok devalias ttya /pci@7c0/pci@0/pci@1/pci@0/isa@2/serial@0,3f8 nvram /virtual-devices/nvram@3 net3 /pci@7c0/pci@0/pci@2/network@0,1 net2 /pci@7c0/pci@0/pci@2/network@0 net1 /pci@780/pci@0/pci@1/network@0,1 net0 /pci@780/pci@0/pci@1/network@0 net /pci@780/pci@0/pci@1/network@0 ide /pci@7c0/pci@0/pci@1/pci@0/ide@8 cdrom /pci@7c0/pci@0/pci@1/pci@0/ide@8/cdrom@0,0:f disk3 /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@3 disk2 /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@2 disk1 /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@1 disk0 /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@0 disk /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/disk@0 scsi /pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2 virtual-console /virtual-devices/console@1 name aliases
Before You Begin
You might need to identify the devices on the system before you can change the default boot device to some other device. For information about identifying devices on the system, see How to Identify Devices on a System.
Ensure that your role has the appropriate rights profiles to perform this procedure. See Using Rights Profiles to Administer Boot Features.
ok setenv boot-device device[n]
Identifies the boot-device value, such as disk or network. The n can be specified as a disk number. Use one of the probe commands if you need help identifying the disk number.
ok printenv boot-device
ok reset-all
The new boot-device value is written to the PROM.
In this example, the default boot device is set to disk.
ok setenv boot-device /pci@1f,4000/scsi@3/disk@1,0 boot-device = /pci@1f,4000/scsi@3/disk@1,0 ok printenv boot-device boot-device /pci@1f,4000/scsi@3/disk@1,0 ok reset-all Resetting ... . Rebooting with command: boot disk1 Boot device: /pci@1f,4000/scsi@3/disk@1,0 File and args:Example 16 Setting the Boot Device to the Network
In this example, the default boot device is set to become network-based.
ok setenv boot-device net boot-device = net ok printenv boot-device boot-device net disk ok reset-all . host1 console login: