reset SMART health status?

[Eoin_Mcguinn at Dell.com]

You can't reset SMART. It's an mechanism internal to the drive which
assesses the overall health of the drive based on a number of
parameters. Unusually, the output from the drive below is quite limited
suggesting that the disk is fairly old, but you would normally see more
SMART registers than just the 2 elements below. 

SMART is a good indicator to the overall health of the drive, so you
would be well advised to replace it.


-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Matthew Rich
Sent: 05 May 2008 18:08
To: linux-poweredge-Lists
Subject: Re: reset SMART health status?

Whoops, forgot the smartctl -a output:

[root at dev ~]# smartctl -a /dev/sdb
smartctl version 5.36 [i686-redhat-linux-gnu] Copyright (C) 2002-6 Bruce
Allen Home page is http://smartmontools.sourceforge.net/

Device: QUANTUM  ATLAS10K2-TY184J Version: DA40 Serial number:
161034511613 Device type: disk Local Time is: Mon May  5 10:50:42 2008
CDT Device supports SMART and is Enabled Temperature Warning Enabled
SMART Health Status: LOGICAL UNIT FAILURE PREDICTION THRESHOLD EXCEEDED
[asc=5d, ascq=2]

Current Drive Temperature:     39 C
Drive Trip Temperature:        75 C
Elements in grown defect list: 2

Error counter log:
           Errors Corrected by           Total   Correction     
Gigabytes    Total
               ECC          rereads/    errors   algorithm      
processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 
bytes]  errors
read:       6397        7         0         0          0         
18.541           0
write:         0        0         0         0          0         
13.485           0

Non-medium error count:       41

Last n error events log page

SMART Self-test log
Num  Test              Status                 segment  LifeTime  
LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background long   Completed                   -   
58463                 - [-   -    -]
# 2  Background long   Completed                   -   
58462                 - [-   -    -]
# 3  Background long   Failed in segment -->       1   53432           
5060950 [0x3 0x11 0x0]
# 4  Background long   Failed in segment -->       1   53432           
5060950 [0x3 0x11 0x0]

Long (extended) Self Test duration: 2048 seconds [34.1 minutes]


Matthew Rich wrote:
> (crossposted from smartmontools-support)
>
> Hello,
>
> I have an elderly PE 2550 that I am using as a testbed platform.  That
is, it is used for experimenting with networking setups, sysadmin
scripting, virtualization, and anything I want to play with that I need
actual hardware for (and thus can't just use a VM). As a consequence,
there is absolutely no mission critical data on this box and if I wreck
the OS, I can just reinstall and start over.
>
> It has two SCSI drives in it, and several months ago one of them began
reporting SMART errors. The output of smartctl -a is at the end of this
email. Specifically, it looks to me like the disk found two bad blocks
at that time but has not had any errors since, and two long background
self-tests I ran just a few days ago found no errors. I don't know
exactly when the errors first appeared, as it was before I began this
job and inherited the box, but I know it was at least 8 months ago and
no new bad blocks have cropped up since.
>
> The LED on the front of the drive is green and the long self test
comes up clean, and since I have no valuable data on the drive it's
essentially "good enough" for me right now. And since it's well out of
warranty and SCSI ultra-320 disks are needlessly expensive I don't plan
to replace it until it croaks for good -- which it shows no sign of
doing anytime soon. However, I am getting tired of the constant
notifications from smartd.
>
> So my question is -- how can I "reset" that SMART health status? I
have been reading man pages (sg3_utils, smartmontools, etc.) and SCSI
mode page documents all morning with no luck. Basically I want to either
change the "threshold" for the LOGICAL UNIT FAILURE PREDICTION to more
than the two errors its found or, if that's not possible, just zero out
the grown defect list so smartd lets me know if any other errors crop
up. Help?
>
> Thanks,
> Matthew
>
>
>   

--
Matthew Rich
Senior Web Application Developer
Northwestern University
School of Education and Social Policy
Annenberg Hall, Room 249
+1 847 467 2819
m-rich at northwestern.edu

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