Configuring a GSP LAN Console

From the GSP Prompt
GSP> SO: Security options & access control
Do you want to modify the GSP wide parameters? - reply N
Do you want to modify the user number 1 parameters? reply Y
Enter new User's Name: admin
Confirm entry:
Current Organization's Name is:
Do you want to modify it? - Reply N
Enter new Login: admin
Enter new Login for confirmation: admin
Do you want to modify the current password? - Reply Y
Enter new Password: admins
Enter new Password for confirmation: admins
Current Dial-back configuration is: Should be "Disabled"
Do you want to modify it? - Reply N
Do you want to modify the user number 2 parameters? - Reply Q
GSP> LC: Configure LAN console
Set the IP address to the Lan Console IP assigned.
Set the GSP Host Name the same as the system's name. ex: crusher (not crusher-c)
Set the Subnet Mask - 255.255.255..0
Set the Gateway address - same as system's primary IP
GSP> ER: Enable remote or LAN console
Current console access state is: Should be
   Remote Console: Enabled
   LAN Console: Enabled

Difference between Paging & Swapping

"Swapping" actually refers to an old(er) memory management mechanism wherein all "pages" of a process where rolled-out to disk when memory needed to be freed.

"Paging" is the modern, more sophisticated mechanism wherein pages of memory are aged over time and so moved to disk as they become unused. Paging imposes much less overhead than the all-or-none swapping.

In HP-UX, you have "swap" space, but in the modern versions HP is doing paging, using the swap space.

Process of paging and swapping are interchangeably used.

But there is a difference between then:

1. Paging : Is the process of removing only one page from virtual space into physical memory and this is called "Page in", and removing only one page from physical memory into the virtual space and this is called "page out".

2. Swapping: Is the process of removing all of a process's pages from physical memory to virtual space and called "Swap out", and removing all of a process's pages from virtual space to physical memory and it is called "Swap in".

Conclusion:

Paging: Only one page.

Swapping: the entire pages belonging to a process.

Locating the disk in Rack

A Simple way of locating a disk is to issue the following command, and watch which disk’s access light illuminates.

# dd if=/dev/rdsk/disk_in_question of=/dev/null

How to find the Bad diks

1. Check the syslog (/var/adm/syslog/syslog.log) looking for disk errors.
2. Check the ioscan (ioscan -fnC disk), looking for NO_HW rather than Claimed.
3.  If diaglogd is running then check STM logs (/var/opt/resmon/log/event.log)
4.  Check the volume group to see if the disk is listed and whether there is any problem with it's status (vgdisplay -v | more)
5. Check lvmtab to see if the disk is supposed to be in a volume group (strings /etc/lvmtab | more)