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How to interpret SMART data


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#1 speedlever

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Posted 20 August 2011 - 07:31 AM

I have 3 HDs in my system. Lately, I've heard an odd buzzing noise when one of the drives is accessed, although it doesn't always happen. I think it's my oldest drive, a Samsung HD321KJ 320GB drive that is over 4 years old. I also have a new 2TB Samsung and a 1.5GB WD in an external case.

I'm really curious about the ECC comparisons between the older hd321kj and the new hd204ui Samsung drives. The WD doesn't appear to have the same SMART info. Can anyone help me interpret the readings? The markers seem to be all over the place on my newest drive, and mostly in the top of the green end on the oldest drive that I suspect may be developing issues.

I pretty much leave the computer on 24/7. The internal HDs are in an Antec Solo case with dual cooling fans right in front of them. Running Win7/64 on an Asus P5B-E with a Corsair HX520W PSU, Intel E6600 cpu, and 6 GB ram. In advanced settings, the HDs are set to turn off after 20 minutes. Are there more optimal settings I should use for this desktop computer?

Samsung HD321KJ (4+ years old). Normal temp is about 28*C.

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Samsung HD204UI (2 months old). Normal temp is about 29*C.

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Western Digital WD15EARS (1+ year old). Normal temp is about 39*C.

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#2 StorageTux

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Posted 20 August 2011 - 07:52 AM

At first, I would use some trustful tool to read SMART values. Definitely try Smartmontools.

#3 speedlever

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Posted 20 August 2011 - 08:32 AM

Thanks. Not familiar with Smartmontools. I'll check it out.

#4 speedlever

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Posted 20 August 2011 - 10:45 AM

Well. Hmm. Ran the smartmontools. Still don't know how to interpret the data. The Hardware recovered ECC data just looks weird to me, but then again all this stuff is Greek to me. Sure looks to me like it's reporting the same info as I pasted earlier, from SpeedFan.

C:\Program Files (x86)\smartmontools\bin>smartctl -a sdb
smartctl 5.41 2011-06-09 r3365 [i686-w64-mingw32-win7(64)-sp1] (sf-win32-5.41-1)

Copyright © 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family: SAMSUNG SpinPoint T166
Device Model: SAMSUNG HD321KJ
Serial Number: S0MQJ1KLB04630
Firmware Version: CP100-05
User Capacity: 320,072,933,376 bytes [320 GB]
Sector Size: 512 bytes logical/physical
Device is: In smartctl database [for details use: -P show]
ATA Version is: 7
ATA Standard is: ATA/ATAPI-7 T13 1532D revision 4a
Local Time is: Sat Aug 20 11:41:45 2011 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed

without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 5905) seconds.
Offline data collection
capabilities: (0x5b) SMART execute Offline immediate.
Auto Offline data collection on/off supp
ort.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 101) minutes.
SCT capabilities: (0x003f) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_
FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 100 100 051 Pre-fail Always -
0
3 Spin_Up_Time 0x0007 100 100 015 Pre-fail Always -
5568
4 Start_Stop_Count 0x0032 073 073 000 Old_age Always -
28145
5 Reallocated_Sector_Ct 0x0033 253 253 010 Pre-fail Always -
0
7 Seek_Error_Rate 0x000f 253 253 051 Pre-fail Always -
0
8 Seek_Time_Performance 0x0025 253 253 015 Pre-fail Offline -
0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always -
33865
10 Spin_Retry_Count 0x0033 253 253 051 Pre-fail Always -
0
11 Calibration_Retry_Count 0x0012 253 253 000 Old_age Always -
0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always -
323
187 Reported_Uncorrect 0x0032 253 253 000 Old_age Always -
0
190 Airflow_Temperature_Cel 0x0022 073 065 000 Old_age Always -
27
194 Temperature_Celsius 0x0022 157 133 000 Old_age Always -
27
195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always -
166685583
196 Reallocated_Event_Count 0x0032 253 253 000 Old_age Always -
0
197 Total_Pending_Sectors 0x0012 253 253 000 Old_age Always -
0
198 Offline_Uncorrectable 0x0030 253 253 000 Old_age Offline -
0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always -
0
200 Multi_Zone_Error_Rate 0x000a 100 100 000 Old_age Always -
0
201 Soft_Read_Error_Rate 0x000a 100 100 000 Old_age Always -
0
202 Data_Address_Mark_Errs 0x0032 253 253 000 Old_age Always -
0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA
_of_first_error
# 1 Short offline Completed without error 00% 33865 -
# 2 Short offline Completed without error 00% 18848 -

Note: selective self-test log revision number (0) not 1 implies that no selectiv
e self-test has ever been run
SMART Selective self-test log data structure revision number 0
Note: revision number not 1 implies that no selective self-test has ever been ru
n
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

#5 StorageTux

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Posted 20 August 2011 - 12:42 PM

the output is broken because windows cmd break the lines. Typical output look like this:

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   117   100   006    Pre-fail  Always       -       127573128
  3 Spin_Up_Time            0x0003   100   100   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       12
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   100   253   030    Pre-fail  Always       -       893897
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       168
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       12
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       8590065666
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   063   051   045    Old_age   Always       -       37 (Min/Max 32/37)
194 Temperature_Celsius     0x0022   037   049   000    Old_age   Always       -       37 (0 26 0 0)
195 Hardware_ECC_Recovered  0x001a   032   032   000    Old_age   Always       -       127573128
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       19
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       18738942312634
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       1421420256
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       1806906902

As long as you have "pre-fail" or "old age", everything should be fine.

Here you can find information about SMART parameters. Many of the values are vendor specific.

#6 speedlever

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Posted 20 August 2011 - 02:18 PM

Thanks. Very helpful info, especially the wiki link that explains the various fields.

#7 vanilla2

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Posted 05 November 2012 - 02:07 PM

gsmartcontrol is a free-open-source gui-wrapper for smartctl and will let you run tests, look at logs, and high-light in red any results you may need to worry about. If you hover the mouse over any red-hight-lighted item, a pop-up explanation will describe the cause for concern. Binary installer for windows, and already in most linux distros. Also lets you load smartctl.txt output from other drives and see if it flags in red any values.

#8 thisperson100

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Posted 05 November 2012 - 06:10 PM

All your drives look ok to me.
The things you want to look out for are "uncorrectable" and many "Reallocated_Sector_Ct" the crc errors are usually due to bad cables in my experience. None of your drives are showing issues with these fields. The ecc field is interesting, but is the result of correctable errors(someone else might confirm/elaborate) and shouldn't be a reason for alarm.

#9 speedlever

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Posted 05 November 2012 - 08:07 PM

Thanks for the late assessments!

I am pleased to report that the buzzing has long since disappeared. I have no idea what that noise was all about and, knocking on wood, the drives all operate flawlessly, best I can tell.



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