Legacy and agile view path.

[UnixT]

Hello ,

Can someone explain me clearly about the difference between Legacy and agile view pathing in HP UX.

[Torsten.]

Your thread

http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1395318

is related up to 11.23, with 11.31 there is a new mass storage stack.

You should read about on

http://docs/hp.com/ -> hpux 11i v3

[sujit kumar singh]

hi


ioscan -fnCdisk -- shows legacy paths that is bound to teh Controller instance number and can change as the controller instance number changes.

ioscan -fnNCdisk --- shows the Persistent DSF files for the device file, this is bound to the WWWN ID of the LUN and this does niot change if there is a change in the COntroller instance or HBA or the change in SAN Switch port etc etc

ioscan -m hwpath -- shows the HW path in Legacy as well as LUN path as well as the LUN HW path

ioscan -m dsf --- shows mapping between the legacy and persistent DSF

vgexport -N option helps you migrate VGs using the new PDSFs

etc etc


can have a look at the Next Generation Mass storage Stack:

http://docs.hp.com/en/MassStorageStack/The_Next_Generation_Mass_Storage_Stack.pdf




regards
sujit

[UnixT]

Thanks a lot Sujith.

Does this persistent DSF is been called and agile view ?

Points assigned,,,

[sujit kumar singh]

Hi


persistent DSFs are called agile DSFs and this sort of naming convention for the Device files is called agile addressing.

different terminology for the same thing.

regards
sujit

[Robert_Jewell]

One quick way to compare how they are different is to say that legacy device files are based on the path to the device. Agile device files are based on the device (regardless of the path).

-Bob

[Jean-Luc Oudart]

Hi

Please review these docs :

Agile view concept :
http://docs.hp.com/en/5992-6584/ch07s02.html

Native multipathing as part o the new storage stack with 11iv3 :
http://docs.hp.com/en/native-multi-pathing/native_multipathing_wp.pdf

Regards
Jean-Luc

[UnixT]

Hi All ...Thanks for your assistance.