topic Re: Replacing disk in a C2300 Disk Array in Disk Enclosures

Replacing disk in a C2300 Disk Array

UnixT — Fri, 29 Aug 2008 02:44:59 GMT

Hi All,

One of the disks in a C2300 Disk Array has gone bad. This Array is connected to 2 K-class servers running HPUX 11.00. When i view the CSTM logs ,it shows me 4 Luns..

MAP:
====

This SP: A (0/0, 7305/SP620) FAULT DETECTED Array Date: 08/28/08
Peer SP: B (1/0) ************** Array Time: 18:51:53
Serial#: 3751A72773 Cabnt Type: Rack Mnt

0 --- ----- ----- ----- ----- 2 --- ----- ----- ----- -----
Fan A: OK | | | | | | | | | | | |
Fan B: OK | Ena | Ena | Ena | Ena | | | Ena | Ena | Ena | Ena | Ena |
VSC A: OK | R-5 | R-5 | R-5 | R-5 | | | R-5 | R-5 | R-5 | R-5 | R-5 |
VSC B: OK | A 2 | A 2 | A 2 | A 2 | | | A 3 | A 3 | A 3 | A 3 | A 3 |
VSC C: -- | | | | | | | | | | | |
BBU: OK ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
A B C D E A B C D E
1 --- ----- ----- ----- ----- 3 --- ----- ----- ----- -----
| | | | | | | | | | | |
| Rdy | Rdy | Rdy | Rdy | Rdy | | Rdy | Rdy | Rdy | Rdy | |
| R-5 | R-5 | R-5 | R-5 | R-5 | | R-5 | R-5 | R-5 | R-5 | |
| B 0 | B 0 | B 0 | B 0 | B 0 | | B 1 | B 1 | B 1 | B 1 | |
| | | | | | | | | | | |
----- ----- ----- ----- ----- ----- ----- ----- ----- -----

Cache: 8mb
Systm: 4mb Firmware Rev: HP02
Read: 1mb Enabled Microcode Rev: 8.61.00 Auto Trespass: Off
Write: 3mb Disabled Prom Rev Levl: 1.63.00 Stat Logging: Off

CONFIGURATION:
==============

Lun C/D Fru/BS Cch ATr Type/Vendor Product ID AprxCap BSz B/R%
--- --- ------ --- --- ----------- ---------------- ------- --- ----

0 B/B * R/- Off RAID-5 C2300WDR5 16.8gb 512
A1 /A1 IBM DCHS04F CLAR04 4.2gb
B1 /B1 IBM DCHS04F CLAR04 4.2gb
C1 /C1 IBM DCHS04F CLAR04 4.2gb
D1 /D1 IBM DCHS04F CLAR04 4.2gb
E1 /E1 SEAGATE ST15150N 4.2gb

1 B/B * R/- Off RAID-5 C2300WDR5 12.6gb 512
A3 /A3 IBM DCHS04F CLAR04 4.2gb
B3 /B3 IBM DCHS04F CLAR04 4.2gb
C3 /C3 IBM DCHS04F CLAR04 4.2gb
D3 /D3 IBM DCHS04F CLAR04 4.2gb

2 A/A * R/- Off RAID-5 C2300WDR5 16.8gb 512
A0 /A0 IBM DCHS04F CLAR04 4.2gb
B0 /B0 IBM DCHS04F CLAR04 4.2gb
C0 /C0 IBM DCHS04F CLAR04 4.2gb
D0 /D0 IBM DCHS04F CLAR04 4.2gb
E0 /? IBM DCHS04F CLAR04 4.2gb

3 A/A * R/- Off RAID-5 C2300WDR5 16.8gb 512
A2 /A2 IBM DCHS04F CLAR04 4.2gb
B2 /B2 IBM DCHS04F CLAR04 4.2gb
C2 /C2 IBM DCHS04F CLAR04 4.2gb
D2 /D2 IBM DCHS04F CLAR04 4.2gb
E2 /E2 IBM DCHS04F CLAR04 4.2gb

SO i have to replace the DIsk at slot E0 .. which is in RAID5 with other 4 disks ..

Can anyone give me the steps on how to replace the disk & rebuild the RAID5 ..
Can this be done through the "hparray" utility .. i searched its man pages .. & tried to start "ARMServer" deamon .. but its not starting..

Thanks in advance ..
Points assured ..

Re: Replacing disk in a C2300 Disk Array

Deepak Kr — Fri, 29 Aug 2008 03:13:05 GMT

how many total disks are there in array?

Re: Replacing disk in a C2300 Disk Array

UnixT — Fri, 29 Aug 2008 03:54:30 GMT

Hi,

There are totaly four LUNS configured ..

LUN0(16.8gb)-(Raid5) 5 x 4.2 GB Disks
LUN1(12.6gb)-(Raid5) 4 x 4.2 GB Disks
LUN2(16.8gb)-(Raid5) 5 x 4.2 GB Disks
LUN3(16.8gb)-(Raid5) 5 x 4.2 GB Disks

Total 19 disks in the whole array.
Now this LUN2.. shown below indicates a "?" for the 5th Disk.. which needs to be replaced..

2 A/A * R/- Off RAID-5 C2300WDR5 16.8gb 512
A0 /A0 IBM DCHS04F CLAR04 4.2gb
B0 /B0 IBM DCHS04F CLAR04 4.2gb
C0 /C0 IBM DCHS04F CLAR04 4.2gb
D0 /D0 IBM DCHS04F CLAR04 4.2gb
E0 /? IBM DCHS04F CLAR04 4.2gb

I searched in HP site .. but dont find any details of this OLD Array...

Re: Replacing disk in a C2300 Disk Array

Torsten. — Fri, 29 Aug 2008 04:25:53 GMT

Can you attach the first output again?
I can't read it.

Normally you should only swap the disk - that's it.

For more info search the forum for "nike disk array".

Re: Replacing disk in a C2300 Disk Array

UnixT — Fri, 29 Aug 2008 04:37:02 GMT

Hi,
I have attached the full CSTM output...
Please check the same & Suggest ..

Re: Replacing disk in a C2300 Disk Array

Torsten. — Fri, 29 Aug 2008 04:53:20 GMT

The "?" indicates a bad drive.

The column header Fru/BS means Disk FRU/FRU-bind-slot.

If you replace the disk, the rebuild will start automatically.

Re: Replacing disk in a C2300 Disk Array

UnixT — Fri, 29 Aug 2008 05:14:54 GMT

Ok ..
This disk is a 4.2 GB SE-SCSI .. which means not hotswappable .. so i have to poweroff before replacing it ?

SO to replace the drive .. i need to ..
1) shutdown the server ..
2) poweroff the Array
3) Then replace the DIsk.
4) Poweron the Array.. ( It should automaticaly start rebuilding the Raid5 Lun ..)
5) poweron the server ..

Does this step look Good ?

Re: Replacing disk in a C2300 Disk Array

Torsten. — Fri, 29 Aug 2008 05:26:24 GMT

All disk drives are hot-plug - never ever change anything on the array while it is powered off!!!

Re: Replacing disk in a C2300 Disk Array

UnixT — Fri, 29 Aug 2008 05:33:53 GMT

So ..

You mean to say .. we can "Hot Swap" the disk while the Array & Server are UP & running ...
Iam little confused .. because when i searched the disk model - DCHS04F ..in sites .. it shows as a Single ended 50 pin Drive .. which i think is not hot swappable ..

Re: Replacing disk in a C2300 Disk Array

Torsten. — Fri, 29 Aug 2008 05:42:14 GMT

Don't worry, SCSI is converted to F/W.

Here are some related manuals for the nike disk array:

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual〈=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=12169&prodSeriesId=64091

Re: Replacing disk in a C2300 Disk Array

Deepak Kr — Fri, 29 Aug 2008 06:36:01 GMT

4.2 GB SE-SCSI are hot swapable.

Re: Replacing disk in a C2300 Disk Array

Torsten. — Fri, 29 Aug 2008 06:49:47 GMT

"4.2 GB SE-SCSI are hot swapable."

This is IMHO a bit too general and wrong, but these disk modules for the nike are converted to F/W SCSI with special connectors for enabling hot swap.

Re: Replacing disk in a C2300 Disk Array

Andrew Rutter — Fri, 29 Aug 2008 20:52:27 GMT

hi,

Just pull out the bad disk, will probably have a amber led on the bad drive, and replace it.

It should just start the rebuild automatically, unless drastic configuration changes have been implemented.

It will take a while for it to present itself back as normal to HPUX. If you want to see whats happening with the array, while its rebuiding and check the config then attach a console directly to the serial port on the back of the array. You will be able to view the grid manager software here.

As for the disks they are all single ended scsi disk in the disk caddies. someone has previously swapped one without the clarion firmware as well. but its fine.

Andy

Re: Replacing disk in a C2300 Disk Array

UnixT — Sat, 30 Aug 2008 15:43:00 GMT

Hi all,

Thanks for all your help ..... just removed the Bad disk & inserted a new one.. it automaticaly started the rebuild.. i viewed it via cstm ..
Everything is working fine now..

Thanks once again ..!

Re: Replacing disk in a C2300 Disk Array

UnixT — Sat, 30 Aug 2008 15:43:55 GMT

Found solution .. with help of the forum responses ...