Booting Phases of HPUX

The booting process of HP Unix is classified into 5 steps:

1) PDC : Processor Dependent Code.

2) ICL : Initial Controller Load.

3) Loading the kernel.

4) Startup scripts.

5) Console login.

Useful HPUX Administrator Commands

# ioscan -funC : Scans for disk attached to the machine.

# ioscan -funC fc : Scans for FC adapter on the machine.

# ioscan -P health -C disk : Shows health status of all the disk.

# ioscan -funC tape : Scans for tape drive on the machine.

# ioscan -m dsf : Mapping between Persistent DSF and Legacy DSF.

# ioscan -funH <Hardware_Path> : Shows list of devices connected to the hardware path.

# ioscan -m lun : Command show the LUN on the machine.

# ioscan -m lun -h <Hardware_Path> : Mapping between the LUN and the Hardware path.

# ioscan -fn : Shows all the devices on the machine.

# lanscan -aip : Show the all the interfaces MAC and Instance Number.

# lanadmin -g <Instance_Number> : Complete information for a particular Interface.

# linkloop -i <Instance_Number> <MAC> : Check the physical cable connectivity of the interface.

# nwmgr : Starting HPUX 11.30, shows physical connectivity of all the interfaces.

# ioscan -fn | grep -i "no_hw" : Get the devices that are not claimed or not in use.

# strings /etc/lvmtab : Command to get the volume groups created and the physical volumes in it.

# lvlnboot -v : Shows current boot logical volume, swap, dump and root logical volume.

# swapinfo -atm : Information about swap space.

# top : Complete information about the machine.

# glance : Complete information about the machine. Similar to "topas" in AIX.

# vmstat -d 1 5 : Shows virtual memory information with "Disk Performance".