SAN disk display

[Jeff Wilder]

We have a new 8640 connected to our EVA 8100 via FC. I have presented multiple disks to the host that are of the same size. My question is how do i know on the host running hp-ux 11i v3 which disk that i see on the host is associated to the lun that was presented to it on the EVA? The host has randomly named the disks like disk316. How can i determine which vdisk this is on my EVA and vice versa? We are VERY new to HP-UX just moving over from OpenVMS so any help on this would be GREATLY appreciated!

[Steven E. Protter]

Shalom,

ioscan

ioscan -fnC disk

This should show the new disks after detection.

On HP-UX 11.11 and 11.23 insf -C disk may be needed to make the disks show up on ioscan. A reboot will also detect disks.

You can match the LUN numbers on the EVA 8100 controller to the ioscan output to determine which disk is which.

SEP

[Jeff Wilder]

Steven, Thanks for the quick reply. That is exactly my problem. I don't see the LUN's that were assigned on the EVA on the host. Here is an example: I have created a 16GB disk named atg201 and presented it to my 8640 with a lun of 201.

The disk appears on my host like this:
disk 316 64000/0xfa00/0x1d esdisk CLAIMED DEVICE online HP
1/0/12/1/0/4/0.0x50001fe1500f733c.0x40c9000000000000
1/0/12/1/0/4/0.0x50001fe1500f7338.0x40c9000000000000
1/0/12/1/0/4/0.0x50001fe1500f733a.0x40c9000000000000
1/0/12/1/0/4/0.0x50001fe1500f733e.0x40c9000000000000
1/0/14/1/0/4/0.0x50001fe1500f7339.0x40c9000000000000
1/0/14/1/0/4/0.0x50001fe1500f733d.0x40c9000000000000
1/0/14/1/0/4/0.0x50001fe1500f733b.0x40c9000000000000
1/0/14/1/0/4/0.0x50001fe1500f733f.0x40c9000000000000
/dev/disk/disk316 /dev/rdisk/disk316


Now, i happen to know that this is the same disk because it is the only 16GB disk i have presented to the host. However, my problem is that i have about 20 other disks that i have presented that are the same size. How do i know which is which?

Sorry about the long post :)

Thanks again for you help!

[Torsten.]

1) you see the LUN and the port WWN in the above output

2) you can calculate the LUN from classic hardware path

3) you can use evainfo

[Jeff Wilder]

Torsten, Thank you for the Reply. I am really not trying to be "thick" here. As i mentioned we are just starting hp-ux :)

1. Can you explain how the lun shows here? I have looked at every hex combination above and nowhere do i get lun 201.I also don't see any WWN that matches ports on my EVA....?

2. Can you explain how to get the lun from the "classic" hardware path?

Thank you!

[Jeff Wilder]

OK, i see that c9 equals 201 so this should be my lun. Still not sure what the 40 represents. And i see the WWN before that.

What is evainfo and how can i get it to run on my system?

Thanks again!

[sujit kumar singh]

Hi Jeff,


the calculation in the LUN ID can be had by looking at the pge 58 of Next genertion mass storage stack.
http://docs.hp.com/en/MassStorageStack/The_Next_Generation_Mass_Storage_Stack.pdf

please note that
The LUN address for a Fibre Channel device is a 64-bit LUNid.



1/0/14/1/0/4/0.0x50001fe1500f733f.0x40c9000000000000


first 4 bit of the 64 bit LUN address 40c9000000000000 are

40c9 = 0100 0000 1100 1001 = 01 00000011001001

01 -- tells Flat Space Addressing

00000011001001 -- tells LUN ID is -- Decimal 209 and Hex c9


regards
sujit

[sujit kumar singh]

hi

please correct this

0000011001001 -- tells LUN ID is -- Decimal 209 and Hex c9

this should read as
0000011001001 -- tells LUN ID is -- Decimal 201and Hex c9
regards
sujit