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TB-SUPPORT  October 2006

TB-SUPPORT October 2006

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Subject:

Re: GridPP provided machines

From:

Kostas Georgiou <[log in to unmask]>

Reply-To:

Testbed Support for GridPP member institutes <[log in to unmask]>

Date:

Fri, 20 Oct 2006 14:05:33 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (60 lines)

On Fri, Oct 20, 2006 at 01:39:28PM +0100, Coles, J (Jeremy) wrote:

> Hi David
> 
> See: http://www.gridpp.ac.uk/tb-support/warranty.txt - 36 months
> warranty on all components. As the machines were handed over to the
> institutes it is up to you to contact Streamline to report the problem
> and get replacement. The contract suggests a 2 working day turnaround
> but I would be interested to know how you got on. Are all four machines
> now showing problems and did they all start at about the same time?
> Perhaps it relates to what you feed them or how they get used!

Machine1: Bad blocks reported by smart about six months ago. The disk
was heavilly used (close to 100% utilization) which is probably the
reason. We replaced the disk on our own and we never did anything about
a replacement as far as I remember :( 

Machine2: Two days ago smart started reporting Multi_Zone_Errors. Running a
smart test gives unknown failure!!! in a random LBA.
....
200 Multi_Zone_Error_Rate   0x0009   001   155   051    Pre-fail FAILING_NOW 8379

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log, version number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended off-line   Completed: unknown failure    90%       530         0x029f0000
# 2  Short off-line      Completed: unknown failure    90%       479         0xfffc0000
# 3  Extended off-line   Completed: unknown failure    90%       479         0x00040000
# 4  Extended off-line   Completed: unknown failure    00%       471         0x17490000
....

Machine3: Last night we started getting errors from the OS
Oct 19 04:15:19 gfe03 kernel: hdb: dma_intr: status=0x51 { DriveReady SeekComplete Error }
Oct 19 04:15:19 gfe03 kernel: hdb: dma_intr: error=0x40 { UncorrectableError }, LBAsect=158983490, high=9, low=7988546, sector=81453800
...
Running smart fails with:
# 1  Extended off-line   Completed: read failure       90%       457         0x0979e542
# 2  Extended off-line   Completed: read failure       90%       456         0x0979e542

But reports zero on Current_Pending_Sector,Offline_Uncorrectable,Reallocated_Sector_Ct,etc
which I find strange.

Machine4: I did run a smart test just in case everything else started having problems
and sure enough I get:

# 1  Extended off-line   Completed: read failure       90%       685         0x00580460
# 2  Extended off-line   Completed: read failure       90%       683         0x00580460
# 3  Extended off-line   Completed: read failure       90%       683         0x00580460

It's likely that the disks had errors for some time now and we just didn't notice because
we don't run smart tests by default in every disk and the OS never tried to read from the
"bad" blocks.

It might be wise for everyone to run smartctl -t long /dev/hda (or hdb) (if they don't have
smartmon configured to do this automatically) just in case.

Cheers,
Kostas

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