HPUX : Ignite restore options available

 

 

		Ignite restore options available
Goodness	2	3	1
Parameters	Using Boot media	Using ignite server/boot helper  from network	Using itool kernel in stand
Availability	physically to be put in the server	no physical presence needed	No need of any other thing except the internal disks .
when it can be used	in all type of cases	only when server is in same subnet .	can be used everywhere in all type of crashed systems .
Chances of failure	If the ignite version of Boot media is lower than the Ignite version of client	Sometimes does not work because it depends on number of other things too . Like tftp , nfs and other things . Because it download the Itool kernel from network	If both the disk are bad and not readable in the system .
what is needed	Media of the latest version to be burnt on the disk	Either a ignite server to be configured in each subnet . Or a Boot helper to be configured in Each subnet . Will need manual configuration of each server to the boot helper so that it gets the designated IP .	Free Space in /stand for approx 100 MB . One time exercise on all servers . Or can be integrated with the CPR archive . To keep the good copy of Iinstall kernel on the /stand to get itool whenever needed .
Redundancy	Need to have multiple boot disks in case the one does not work	Need to have more then one boot helper server . In case one configured gets failed while it is needed	Already redundant copy of Iinstall kernel in /stand will be available in the system . As the boot disks must be mirrored in the systems . So while booting the system if any one of the boot disk is available we can get Itool .
Pre Checks to be done	to ensure the availability of the boot media on all datacenters	to ensure that the boot helper server is available in all the Subnets .	to ensure that all the systems have mirrored root disk