question about SAN

[Fernando martinez_3]

Hello,
Anybody can explain me the formula
to calculate the SCSI target and SCSI LUN addresses about
this fabric address,im using XP 1024 storage

ext_bus 16 1/0/10/0/0.1.12.0.0 fcparray CLAIMED INTERFACE FCP Array Interface
ext_bus 18 1/0/10/0/0.1.12.255.0 fcpdev CLAIMED INTERFACE FCP Device Interface

Thank you in advanced.
Fernando.

[mavrick]

Hi,

1/0/10/0/0-->HBA card. 1(domain).12 is port


ext_bus 16 1/0/10/0/0.1.12.0.0 is connecting to your Storage FC.

ext_bus 18 1/0/10/0/0.1.12.255.0 IS connected to scsi-fc bridge

[Matti_Kurkela]

Here's the "Rosetta stone" for interpreting the FC-specific portion of the hardware path:

http://docs.hp.com/en/A6795-90006/ch01s11.html

Note that this applies to paths of type "disk". The paths you've shown are of type "ext_bus", so the disk paths will have some more numbers appended to these paths.

You have a cell-structured server, so the path to the card has five numbers separated by slashes instead of four. The extra number in the beginning is the number of a cell.

As mavrick says, domain is 1 and area (which may indicate the port number of the FC switch) is 12.

MK

[Don Mallory]

Once you get a disk presented to that host, you can also determine the LUN from the last 3 digits. Here's an example (from a VA7410):

disk 173 0/2/0/0.2.4.0.2.11.6 sdisk CLAIMED DEVICE HP A6218A


Domain ID 2, Port 4, LUN 2.11.6

6 x 1 = 6
11 x 8 = 88
2 x 128 = 256

sum the 3 and you get 350

The LUN # is 350.

So, the numbers are base256 . base16 . base8 or (val x 128) + (val x 8) + (val x 1).

You can get this out of the FC addressing manuals, but, this is mostly what it says.

Don