Disk Array

[shaikh_mahaboob]

hi

one more problem after creating Raid5 and i started writing data on to the disk array then i got this error Panic 00000012, 9886576=0096DB70 DDRAM Parity Error
please tell me what to do


Thanks

Shaikh

[Vincent Farrugia]

Hello again,

I think it's an SP SIMM problem. Contact your HP engineer and describe him the problem. I think you need a SIMM replacement.

HTH,
Vince

[shaikh_mahaboob]

hello

what is simm can u describe please

Thanks

Shaikh

[Vincent Farrugia]

Hello,

SIMM is Single-In-line Memory Modules. Each SP (Storage control Processor) has 4 sockets in which you can put such SIMMs. These provide memory for the SP.

HTH,
Vince

[shaikh_mahaboob]

hi

is this part of Disk array. when i am writing data on to the disk disk array is going offiline what could be the problem

Thanks

Shaikh

[Vincent Farrugia]

Hello,

Did you manage to configure Gridmanager yesterday?

If so, enter Gridmanager and select Presentation Utility. On the lower right corner of the screen, there should be "Cache States" written. From there, can you tell me whether Write and Read are disabled or not?

[shaikh_mahaboob]

hi

yesterday i managed gridmgr anf i have build LUN again. after that i have created Volume group and logical group also and the file system then i was trying to write data on to the disk disk array going offiline and i go the error in gridmgr ok

in gridmger it is showing Cache status read ,write are DISABLED

Thanks

Shaikh

[Vincent Farrugia]

Ok,

Then I think you have a faulty SIMM. Contact your HP engineer and tell him the problem.

HTH,
Vince

[shaikh_mahaboob]

hi

OK. But in SAM it is showing chaching is enabled.

[Vincent Farrugia]

SAM on the Nike 20 is showing write cache enabled?

[shaikh_mahaboob]

hi

Yes in sam it is showing caching enabled


Thanks

Shaikh mahaboob

[shaikh_mahaboob]

Hello

Prasentation Utility is showing
Subsystem :FAULT,
Peer SP REMOVED
Statistics logging DISABLED
Request COMPLETED 560

please tell me about this all these settings ok or not

Thanks

Shaikh

[shaikh_mahaboob]

hi

Please find the attached file of disk array

[Bill McNAMARA_1]

From the attached, where are your LUNs?!

Do you see anything on
ioscan -fnkCdisk | grep C2


Cache: 8mb
Systm: 2mb Firmware Rev: HP02
Read: 0mb Disabled Microcode Rev: 9.26.07 Auto Trespass: Off
Write: 6mb Disabled Prom Rev Levl: 8.02.00 Stat Logging: Off


Your cache is disables because you have lost SPB

Go behind and power cycle it.

Or connect directly via RS232 to gridmanager and reset.

You can upgrade your controllers to the Phoenix revision, which will see a 2X perf increase. Ask your CE/RCE.

Later,
Bill

[shaikh_mahaboob]

hi

here is the attachment after issuing the command please find the attachment
and please tell me clearly

Thanks

Shaikh

[shaikh_mahaboob]

hi

here is the attachment after issuing the command please find the attachment
and please tell me clearly

Thanks

Shaikh

[Bill McNAMARA_1]

Unfortunately your LUNs are gone.

The LUN 1 is
NO_HW

The LUN 0 doesn't exist from your earlier attachment.
(But will show up as CLAIMED no matter what, once the server can communicate with the array)

So, you're going to have to recreate your LUNs (Bind) and restore all your data.

There are a few tricks with Gridmanager using Ctrl ][][][][ diagnostic mode to repair disk headers but you'd need to know exactly what was configured earlier... not many people know how to use those diags either..


What I recommend is looking at the
strings /etc/lvmtab
output now and determining what vg is lost and the output of
cat /etc/fstab to determine what file systems are lost
and get out the backups.


The only idea I have of why it's all gone horribly wrong is
1> Firmware/Patch
2> Somebody deleted the LUNs
via GridManager Connecting to the RS232.

3> ?


I suggest powering off, waiting 1 minute, and then powering on the array first.

Then when the array is back up:

ioscan -f


top
(wait for the ioscan to finish)

ioscan -fnkC disk | grep C2

hopefully your LUNs will come back although I doubt it.

Call HP Support and get a qualified CE on site to see what he can do.


Later,
Bill

[Bill McNAMARA_1]

By the way, disabled Write cache does not necessarily meant that the DIMM is failed.

You have an option to configure Write cache from Gridmanager.

Heres a Nike links:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x417edfe5920fd5118fef0090279cd0f9,00.html

[Bill McNAMARA_1]

Correcting the above link:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x5b7750011d20d6118ff40090279cd0f9,00.html

[shaikh_mahaboob]

hi

just now i build the LUN with 12 disk raid 5

here i am sending attachment pls checkout and help me

thanks


Shaikh mahaboob

[Bill McNAMARA_1]

Good, this has changed the LUN description field.
DGC C2300WDR5
^^^^^^ R5

12 Disk RAID 5 is not a great idea on a Nike20

try a five disk raid five.

The NO_HW is not a problem now as there is no LUN 1

The Lun 0 shows up claimed as it should.

When the R5 lun is built,
Enable Caching from the
GridM> Controller Changes

You may need to enter into FE mode..
Ctrl P then hold Shift FE enter at the presentation screen.

Enable caching on the lun, make sure that when you bound the LUN that you selected caching for the LUN too.
It's off by default.

After this is done, Reset the Controller from the Controller Changes menu
(not sure if it'll be possible with your f/w - if not, just reset the OTHER SP... ie power cycle it.)
Any caching changes are not taken into account unless the TWO SPs are reset. The config (and firmware lives on the disks)



Now, from your ioscan output,
I only see ONE SP.
The one on
8/4.0
(this is a K ?)

The other one I presume is on the same bus?

I don't see it in the ioscan:


You cabling looks like?
see diag attached

[Bill McNAMARA_1]

decode dimm panic to specific DIMM:

[Bill McNAMARA_1]

When in FE mode, check the error logs (UEL) and post it up here.

It will explain the fault.

Do the same on SPB via Gridmanager too.

Later,

Bill

[Bill McNAMARA_1]

any update?

Bill

[shaikh_mahaboob]

hi
Still i am i working on LUNs only

as u said when the R% LUN is built
Enable caching from grid mger controler. but ther eis not tab called controler changes can u tell me how to enter.

Thanks

Shaikh