WWN in HP-UX

[Bruno Cunha]

Hello all,

I have connected a storage with several fiber tape drives. How can I see the wwn of each drive so I can figure out in what position is each drive in the storage ?

Thanks

[Massimo Bianchi · Accepted solution]

Hi,
i don't know why do you want to know the wwn...

the only utility i know that show the wwn is fcmsutil, refer to the man pages for all the option.


But you can decipher the ioscan more easily, and with the same information:



|---------------> Protocol type
| |------------> Area
| | |---------> Port ID
0/8/0/0.3.23.42.0.0.0
| | |--> Lun: 3 bits for LUN from 0 to 7
| |----> Target: 4 bits for target from 0 to 15
|------> Bus: 8 bits but it uses only 4 upper bits for bus

In general, we have for example: (terminology)

0/8/0/0 --> This is HBA address (Host Bus Adapter)
3.23.42 --> Fibre channel Path has 3 decimal fields
0.0.0 --> Virtual SCSI-2 has 3 decimal fields


Massimo

[Massimo Bianchi]

Hi,
forgot to say that previous was the output in case of a SAN, with a brocade switch.

Massimo

[Eugeny Brychkov]

fcmsutil /dev/tdX devstat all | more
you can look at 'man fcmsutil' to see more options of fcmsutil utility.
Usually you can match drives to device files/paths by checking their SCSI or loop ids (or switch ports and switch domain Ids), see Massimo's post.
In addition to his reply I would add that FC identifier of storage device consists of 3 numbers, which are
x.y.z
x = switch domain ID (switch to which storage device is connected to), 8 for private loop;
y = switch's port to which storage device is connected to (0 for private loop);
z = alpa, 0 for fabric
Eugeny

[RolandH]

Do an ioscan on you server

# ioscan -kfnCfc (in my case I get)

Class I H/W Path Driver S/W State H/W Type Description
=================================================================
fc 0 0/10/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter
/dev/td0
fc 1 0/12/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter
/dev/td1

thend do

# /opt/fcms/bin/fcmsutil /dev/td0

Vendor ID is = 0x00103c
Device ID is = 0x001029
XL2 Chip Revision No is = 2.3
PCI Sub-system Vendor ID is = 0x00103c
PCI Sub-system ID is = 0x00128c
Topology = PRIVATE_LOOP
Link Speed = 2Gb
Local N_Port_id is = 0x000001
Local Loop_id is = 125
N_Port Node World Wide Name = 0x50060b000011b42b
N_Port Port World Wide Name = 0x50060b000011b42a
Driver state = ONLINE
Hardware Path is = 0/10/0/0
Number of Assisted IOs = 28429722
Number of Active Login Sessions = 4
Dino Present on Card = NO
Maximum Frame Size = 960
Driver Version = @(#) PATCH_11.11: libtd.a : Jun 28 2002, 11:08:35, PHSS_26799



Similar for all other fc devices


Regards
Roland

[Bruno Cunha]

Thanks to all,

that will help me alot.

Now some points... :-)

[RolandH]

I forgot something If you want the wwn for all attched devices at this fc controller you must do

# /opt/fcms/bin/fcmsutil /dev/td0 get remote all

the device file is valid in my case. replace it with your device file from the tachyon controller where your drive is attached.


Regards
Roland

[Bruno Cunha]

In my case isn't a tachyon but a jnic fc card.
The fcmsutil is a utility for tachyon only ? Or it will work for jnic ?
The output will give a association from a wwn to a device file ? For example /dev/rmt/ wwn:0x50060b000011b42b
I want to get this association because I only know for a fisical drive is wwn, then I will know that the drive with the wwn something belongs to the device file /dev/rmt/xxxx wich belongs to the fisical drive in position 5 in the library.

Regards

[RolandH]

Hi Bruno,

I'm not familar with jnic cards but I found this on http://www.jni.com/Drivers
----------------------------------------------
Determine the jnic interface name and World Wide Port Name (WWPN)
of the storage.

This can be done by searching the /var/adm/syslog/syslog.log file
for messages that look like:

vmunix: jnic0: Port 0000EF (WWN 50060B0000092B1E:50060B0000125F8E)
available.

The following UNIX shell command will also expose all storage
ports found by the HBA:

grep ') available' /var/adm/syslog/syslog.log

In the example above, the jnic interface name is "jnic0", and
the WWPN is "50060B0000125F8E".
----------------------------------------------

So, figure out your product ID from your card and get the manual from the side.

Regards
Roland