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WWN has changed at nport Id = 0x10700

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grshankar
Frequent Advisor

WWN has changed at nport Id = 0x10700

Hi Experts,

we have S16K-A server with OS version as B11.11,frequently we are get following error.


Summary:
Adapter at hardware path 1/0/8/0/0: Target WWN no longer acceptable


Description of Error:


lbolt value: -1847383001

World wide name (unique identifier) for following device has
changed
nport Id = 0x10700


Probable Cause / Recommended Action:

Unlike paralled SCSI, Fibre Channel allows easy hot-swapping of disks
Due to address conflicts it is possible for disks to swap loop IDs
accidently when re-plugging them into a hub.
In order to reduce the chance of user data corruption or file system
panics, we normally require the world wide names for a particular device
to stay the same. Requiring the fcmsutil replace_dsk command ensures
that the replacement is intentional.
The driver has detected a new "world-wide name" unique identifier
at a loop position previously occupied by a device with a different
identifier.
If this is due to a deliberate replacement of the
previous device, use the fcmsutil replace_dsk command
to allow the new device to be used. If there has
been no intentional replacing of any devices, check
for conflicts in address assignments of devices on
the loop.
The fcmsutil output show /dev/td3 is fine.
fcmsutil /dev/td3

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 = PTTOPT_FABRIC
Link Speed = 2Gb
Local N_Port_id is = 0x010200
N_Port Node World Wide Name = 0x50060b000030dfd3
N_Port Port World Wide Name = 0x50060b000030dfd2
Driver state = ONLINE
Hardware Path is = 1/0/8/0/0
Number of Assisted IOs = 42748622
Number of Active Login Sessions = 0
Dino Present on Card = NO
Maximum Frame Size = 2048
Driver Version = @(#) libtd.a HP Fibre Channel Tachyon TL/TS/XL2 Driver B.11.11.12 PATCH_11.11 (PHSS_31326) /ux/kern/kisu/TL/src/common/wsio/td_glue.c: Sep 5 2005, 10:14:40


11 REPLIES
grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

If anybody knows why this message has generated and how to resolve it.please me know.
Michal Kapalka (mikap)
Honored Contributor

Re: WWN has changed at nport Id = 0x10700

hi,

check EMS / error messages in syslog.log....

ioscan -fn |grep NO_HW.....

mikap
grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

Hi mikap,
There is no hard disk failure nor fc failure.Every thing seem to be fine and in the log it show fcmsutil replace_dsk.
what does it mean
Michal Kapalka (mikap)
Honored Contributor

Re: WWN has changed at nport Id = 0x10700

grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

As per doc fc was plugged out& plugged in with new cable . Here fc was not plugged out to use fcmsutil replace_dsk command.
grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

Any one out there,please help me out.
singh sanjeev
Trusted Contributor

Re: WWN has changed at nport Id = 0x10700


Run below command on the system,it will solve your problem.

#fcmsutil /dev/td3 replace_dsk 0x10700
Sanjeev Singh
grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

No it's not working for me, it is throughing out error as No Such device or address.
TTr
Honored Contributor

Re: WWN has changed at nport Id = 0x10700

You keep insisting that there is no hardware failure and that no disks were replaced. The "replace_dsk" does NOT replace any disks either. It allows you to clear an UNUSED or MISSING WWN entry in the fiber channel device table.

Take a look at these commands and see if you get any additional details for the device at port 0x10700

fcmsutil /dev/td3 get remote all

fcmsutil /dev/td3 devstat all

You don't provide any feedback of what you have tried so far. Things like "it doesn't work" or "it's throwing an error" are not meaningful. Post exactly what you typed and what you got back as a response or error.
grshankar
Frequent Advisor

Re: WWN has changed at nport Id = 0x10700

Sorry for the delay,struck with something else,here i have attached the details,
#fcmsutil /dev/td3 replace_dsk 0x10700
Failure in ioctl: No such device or address

Thanks in advance.
TTr
Honored Contributor
Solution

Re: WWN has changed at nport Id = 0x10700

I think the HBA sees every port in the fabric. You should not have that many ports showing up. How are your switches zoned?

The 0x107000 port is not a device port. When you replaced the fiber cable, was there a transceiver replaced on the SAN switch? Or was the fiber plugged in to a different port?

Ok, the "replace_dsk" does not apply. Rebooting the server will clear it up. If you can you can also try to reset the HBA (fcmsutil command - it will stop the i/o for a second or tw on that HBA).