smartmontools check and report error

From: lsllcm <lsllcm_at_gmail.com>
Date: Sun, 1 May 2011 08:10:22 -0700 (PDT)
Message-ID: <3c8000c0-c7ad-4eda-98a9-3d269ea704e6_at_s34g2000prg.googlegroups.com>

Hi All,

I use smartmontools to check disk, and below are some information from smartmontools. The command "smartctl -a" display all information about disk.

[root_at_pft test]# smartctl -a /dev/sda
smartctl 5.40 2010-10-16 r3189 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

Device: SEAGATE ST3146707LW Version: D703 Serial number: 3KS44F26
Device type: disk
Transport protocol: Parallel SCSI (SPI-4) Local Time is: Sun May 1 17:23:03 2011 CST Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported SMART Health Status: OK

Current Drive Temperature:     38 C
Drive Trip Temperature:        68 C

Elements in grown defect list: 0
Vendor (Seagate) cache information
  Blocks sent to initiator = 4049936218
  Blocks received from initiator = 3512969809   Blocks read from cache and sent to initiator = 4232096461   Number of read and write commands whose size <= segment size = 520992750
  Number of read and write commands whose size > segment size = 245 Vendor (Seagate/Hitachi) factory information   number of hours powered up = 39797.30
  number of minutes until next internal SMART test = 104

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:   39307801        0         0  39307801   39324131
33362.802         115
write:         0        0         0         0          0
6134.417           4

Non-medium error count:        3

SMART Self-test log
Num  Test              Status                 segment  LifeTime
LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed, segment failed   -
39797                 - [-   -    -]

Long (extended) Self Test duration: 2726 seconds [45.4 minutes]
[root_at_pft test]#

I don't understand the meaning of below three parts:

1.Error counter log part. What is the meaning of "Total uncorrected errors"? Is it logic corrupt or physical corrupt? 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:   39307801        0         0  39307801   39324131
33362.802         115
write:         0        0         0         0          0
6134.417           4

2. Non-medium error count. What is the meaning here?
Non-medium error count:        3

3. What is meaning of "Completed, segment failed " status? SMART Self-test log

Num  Test              Status                 segment  LifeTime
LBA_first_err [SK ASC ASQ]
     Description                              number   (hours)
# 1  Background short  Completed, segment failed   -
39797                 - [-   -    -]

Thanks Received on Sun May 01 2011 - 10:10:22 CDT