How to boot a vPar in different modes?

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vPars Monitor and partition database[edit]

With or without vPars, the firmware loads and launches ISL or EFI. In a server without vPars, from ISL or EFI, the loader hpux or hpux.efi loads the kernel /stand/vmunix:

PA-RISC

ISL> hpux /stand/vmunix

Integrity

HPUX> boot vmunix


However, in a server with vPars, from the loader (hpux or hpux.efi) loads the vPars Monitor (/stand/vpmon):

PA-RISC

ISL> hpux /stand/vpmon

Integrity

HPUX> boot vpmon

Single User Mode[edit]

On a vPars server, you can boot a virtual partition into single-user mode either at the monitor prompt or at the shell prompt of a running partition.

For example, if we wanted to boot winona2 into single user mode:

From MON> From the monitor prompt, specify the -is option as an argument to vparload.

MON> vparload -p winona2 -o "-is"

From shell prompt From the shell prompt of another virtual partition, specify the -o option with the vparboot command:

winona1# vparboot -p winona2 -o "-is"

NOTE: To boot a virtual partition, the partition must be in the down state. If the partition is in the hung state, perform the following before executing the vparboot:

Turn off autoboot for the target partition:

winona1# vparmodify -p winona2 -B manual

Attempt to reset the target partition with the -t option (soft reset):

winona1# vparreset -p winona2 -t

If it still appears to be hung, reset it with the -h option (hard reset):

winona1# vparreset -p winona2 -h

Continue verifying the state until vparstatus shows that winona2 is in the down state:

winona1# vparstatus -p winona2 -v | grep -E "Name|State"
Name: winona2
State: down

After you have entered into single-user mode and if you want to turn autoboot back on, the command is:

winona1# vparmodify -p winona2 -B auto

Maintenance Mode[edit]

When troubleshooting LVM, you may need to enter into maintenance mode using the -lm option. For more information on maintenance mode, see the book "Managing Systems and Workgroups."

On a vPars server, you specify the -lm option but as an argument to either the monitor vparload command or as a -o option to the shell vparboot command.

For example, if the partition winona2 is down, to boot winona2 into maintenance mode:

From MON> From the monitor prompt:

MON> vparload -p winona2 -o "-lm"

From shell prompt From the running partition winona1:

winona1# vparboot -p winona2 -o "-lm"

Overriding Quorum[edit]

In LVM, when the root disk is mirrored, the server can only activate the root volume group, which contains the OS instance, when the majority of the physical volumes in a root volume group are present at boot time. This is called establishing a quorum. Sometimes, you may want to boot an OS instance regardless of whether a quorum is established. You can override the quorum requirement by using the -lq option. For more information on quorums, see the book "Managing Systems and Workgroups."

On a vPars server, you can execute either of the following:

From MON> From the monitor prompt, to boot winona2 overriding the quorum requirement:

MON> vparload -p winona2 -o "-lq"

From shell prompt From the running virtual partition winona1, to boot winona2 overriding the quorum requirement:

winona1# vparboot -p winona2 -o "-lq"

From the running virtual partition winona1, to modify winona2 to override the quorum requirement when booting:

winona1# vparmodify -p vpar1 -o "-lq"  

In a vpar server the mkboot command is not useful as the quorum override is handled by the vPars Monitor database. The AUTO file is no read when a vpar is booting. The only time the AUTO file is read, is when the server or nPar is booting, just before loading the vPar Monitor.


NOTE: Specifying the boot options from the command line only affects the current boot. On a non-vPars server, to have a server permanently boot with the -lq option, you would put "hpux -lq" in the LIF AUTO file. On a vPars server, to have a partition boot with the -lq option, you would simulate the AUTO file usage by entering the -lq option into the partition database. See “Simulating the AUTO File on a Virtual Partition” in vPars Manual.

Additional information[edit]

HP-UX Virtual Partitions Administrator’s Guide

http://www.docs.hp.com/en/T1335-90083/index.html

Switching between nPars and vPars Modes (Integrity only)

http://www.docs.hp.com/en/T1335-90083/ch05s02.html

Authors[edit]