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VA 7410: Redundancy loss

John Henriksson_2
Occasional Visitor

VA 7410: Redundancy loss

The following error messages always appear on the va 7410:

WARNING: The configuration of the subsystem is such that one or more drives has only a single path of access to it.
WARNING: A rebuild operation failed.
WARNING: Some data in the device lacks redundancy, and is exposed to becoming unavailable if further drive removals or failures occur.

I have recently done a armfmt -h -a, and created two luns. After some time of usage, usually after half an hour or so, the error messages always appear. Any ideas what could be the cause? I have attached a armdsp -a.

8 REPLIES
Rgomes
Valued Contributor

Re: VA 7410: Redundancy loss

Hi,

Can you see with:
armdsp -t

regards,
Richard
John Henriksson_2
Occasional Visitor

Re: VA 7410: Redundancy loss

I can see nothing obviously wrong with armdsp -t. I have attached the output. Perhaps you can spot what the problem is?
Rgomes
Valued Contributor

Re: VA 7410: Redundancy loss

:-( I cann't say, it's very unusual...
What does 'logprn' say before and after this message? logprn for 2days might help.

regards,
Richard
Peter Mattei
Honored Contributor

Re: VA 7410: Redundancy loss

Your problem is that one loop of each controller is down. Thus only one loop per disk is alive!
See your armdsp -a output. You will find that 2 out of 4 Backports are down!

See my attached drawing: You find to the right of each controller two FC-AL loops going to the disks. You obviously lost one of each controller but you are lucky that you can still access all dïsks! You could have lost both loops to the same set of disks!

Check if all backend FC cables are plugged. If yes call HP for support!

You will find more information in the following manual:
http://h200006.www2.hp.com/bc/docs/support/SupportManual/c00088801/c00088801.pdf

Cheers
Peter
I love storage
Rgomes
Valued Contributor

Re: VA 7410: Redundancy loss

oops I missed that....thanks Peter!!

Yes 2 back ports are down indeed:
Back Port At M/C1.J2:
Status:_____________________________Good
Port Instance:______________________1
Hard Address:_______________________126
Link State:_________________________Link Down
Node WWN:___________________________50060b000014e9ad
Port WWN:___________________________50060b000014cd33


Back Port At M/C2.J2:
Status:_____________________________Good
Port Instance:______________________1
Hard Address:_______________________126
Link State:_________________________Link Down
Node WWN:___________________________50060b000014e9ad
Port WWN:___________________________50060b000014cd5f

regards,
Richard
John Henriksson_2
Occasional Visitor

Re: VA 7410: Redundancy loss

If I have understood correctly those ports should be down. C1/J2 and C2/J2 is for external disks. I do not have any additional enclosures.

I have attached a logprn output from today. There are a few errors reported on disk 11, but if that was the problem I would guess it should not report the drive as having status "good".

Strange...
Rgomes
Valued Contributor

Re: VA 7410: Redundancy loss

Hi,

What does dmesg, syslog.log say? Do you have any pv timeout, powerfail or read write scsi error in dmesg or in syslog?

Regards,
Richard
John Henriksson_2
Occasional Visitor

Re: VA 7410: Redundancy loss

There is nothing indicating a problem in syslog or dmesg. The error messages usually appear even before accessing the luns.