HP - IBM SAN Connection

[Samboja]

Hi all,

I'm going to connect my HP N4000 server to Storage area network IBM ESS2105-F20. I use FC adapter A5158A. After I install A5158A card, install driver and some patches required by IBM guys, then i connect FC cable from my N4000 server to FC switch IBM 2109-S08. IBM guys configure their SAN to allocate LUN which will be used by HP N4000. After all i run ioscan -f, and the FC Tachyon has been claimed.
But, I can't see IBM SAN disk attached to N4000 when i run ioscan -funCdisk.
Could anybody help me pls, what should i do ?

[Michael Tully]

Hi,

If the output of your 'ioscan -fn' does not show the actual devices, try this:

# cd /dev
# insf -e
Run your ioscan again
# ioscan -fn

HTH
-Michael

[Samboja]

Hi Mike,

thx 4 your info, let you know i've run insf -e, but still can't work.

[Duncan Edmonstone]

Couple of things to try...

1 Is your FC card reporting that it is logged in to the fabric/loop? assuming this is connected through your 1st FC card, use

fcmsutil /dev/td0

to check.

2. What LUN numbering has been assigned on the disk array? The following is a limitation in ioscan:

The stated limitations on lun numbering are that they must start at zero and be in sequential order. If there are any "gaps" in lun numbering, ioscan will not recognize the high order luns above the gap.

You need patch PHKL_21607 or or newer (latest is PHKL_25675) to sort this out.

HTH

Duncan

[Krishna Prasad]

The first step is to make sure that you are attaching to the SAN. If you are not getting a link light into the switch then you have a driver/patch issue.

If you are connected and you can see the card but not the disks then I think the IBM guys may need to grant your host access to the drives. ( I use EMC not IBM but I think they work close to the same. )

[Thom Cornwell]

Is the switch port set at Arbitrated Loop or Fabric?

[Samboja]

Hi,

Thanks 4 your information, let you know that i've already install PHKL_25675 and its dependencies. IBM guys said that the switch is passive, its follow server configuration weather fabric loop or arbitrated loop.
When I run fcmsutil /dev/td0, say Error FCP is not loaded, although all driver (fcT1_fcp, fcT1_cntl, fcT1, fcp)has been configured by SAM

Do I need specific FC cable to connect from A5158A to IBM 2109 models S08 ?

[Jason VanDerMark]

Greetings,

First let me reiterate what was already mentioned with regards to your ioscan. the 'u' option tells the ioscan to grab its information from that which is in the kernel from boot time. Dropping the 'u' (eg ioscan -fnC disk) forces the system to poll all the hardware to rebuild the data that the kernel sees. I just wanted to expand on that point a bit. Your errors from your card would seem to indicate that your FC adapter is not setup for Fabric which would leave it in Arbitrated Loop.(Yuk!) I would ask the IBM folks to ensure that their switch is set to use Fabric as well as their HBAs on their storage array. I hope that this helps.

Regards,
Jason V.

[Duncan Edmonstone]

Even with no cable connected the fcmsutil command should return something usefull, not just an error, so I would say the problem is definately on your server rather than the SAN...

What output do you get from:

swlist -l fileset -a state A5158A

HTH

Duncan

[Thom Cornwell]

Connect the tx to the rx on the card and then run fcmcutil. The card follows the switch port. It tries fabric login first and if unsuccessful it tries arbritrated loop.