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[gunrunnerjohn]

Here it is madly copying a couple gigs of data.


root@DNS-323:/# smartctl -a -i -d marvell /dev/sda
smartctl version 5.38 [arm-unknown-linux-uclibc] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model:     SAMSUNG HD154UI
Serial Number:    S1Y6J1LS719234
Firmware Version: 1AG01118
User Capacity:    1,500,301,910,016 bytes
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 3b
Local Time is:    Thu Aug 19 16:43:56 2010 DST

==> WARNING: May need -F samsung or -F samsung2 enabled; see manual for details.

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:                 (19043) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        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:        ( 255) minutes.
Conveyance self-test routine
recommended polling time:        (  33) minutes.
SCT capabilities:              (0x003f) SCT Status 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   062   062   011    Pre-fail  Always       -       12210
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       486
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   253   253   051    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0025   100   100   015    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       5344
 10 Spin_Retry_Count        0x0033   100   100   051    Pre-fail  Always       -       0
 11 Calibration_Retry_Count 0x0012   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       21
 13 Read_Soft_Error_Rate    0x000e   100   100   000    Old_age   Always       -       0
183 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
184 Unknown_Attribute       0x0033   100   100   000    Pre-fail  Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   065   064   000    Old_age   Always       -       35 (Lifetime Min/Max 21/36)
194 Temperature_Celsius     0x0022   065   065   000    Old_age   Always       -       35 (Lifetime Min/Max 21/40)
195 Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always       -       102094588
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   253   253   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

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]


SMART Selective self-test log data structure revision number 1
 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.

[gunrunnerjohn]

And another one shortly after.  Looks like Hardware ECC recovered counts up madly, none of the others change much.



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   062   062   011    Pre-fail  Always       -       12210
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       486
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   253   253   051    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0025   100   100   015    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       5344
 10 Spin_Retry_Count        0x0033   100   100   051    Pre-fail  Always       -       0
 11 Calibration_Retry_Count 0x0012   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       21
 13 Read_Soft_Error_Rate    0x000e   100   100   000    Old_age   Always       -       0
183 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
184 Unknown_Attribute       0x0033   100   100   000    Pre-fail  Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   065   064   000    Old_age   Always       -       35 (Lifetime Min/Max 21/36)
194 Temperature_Celsius     0x0022   065   065   000    Old_age   Always       -       35 (Lifetime Min/Max 21/40)
195 Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always       -       102645802
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   253   253   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

SMART Error Log Version: 1
No Errors Logged

[gunrunnerjohn]

I guess it depends which articles you read...

E.g. this article suggests as early as a year
http://www.larryjordan.biz/articles/lj_restore_hard_disk_data.html

Well, I can say my experience with a number of drives is different.  I've had a few of them that are years old and powered up and ran fine.

I recently dug out an old system that has Windows 98 on it because it has a 12 channel ISA video board that I was fixing a program for, booted it up and fixed the program without a hitch.  It hadn't been powered on for 4-5 years at least.  It was buried in the closet, I had to take a whole pile of stuff out to get to it!

[jamieburchell]

Thanks for posting your results. Sadly I'm none the wiser. Your read error rate is zero. Your ECC value doesn't match the read error rate like mine. My spin-up time is zero and yours isn't.

In contrast, my new Samsung 2TB drive showed the error rate as 0 for first day or so and now is "1". It also shows a spin-up time value. ECC value is 0.

So I really have no idea what these figures actually mean.

[gunrunnerjohn]

I'm just looking at my data, and I think I need to use a different control to actually run a test.

How are you invoking the test?

[jamieburchell]

Well, I can say my experience with a number of drives is different.

I'd tend to agree. I was wondering at a basic level if running a rsync across the drive "refreshed" the data. I'm just paranoid.

[jamieburchell]

I'm just looking at my data, and I think I need to use a different control to actually run a test.

How are you invoking the test?

To get the print out? Same as you did: smartctl -a -i -d marvell /dev/sda

[gunrunnerjohn]

OK, that's all I'm doing.  I was thinking I needed to run the SMART test, but in looking closer, I see that all I should have to do is to print the accumulated SMART data.

Don't know what to tell you, maybe it's time to go drive shopping!

[gunrunnerjohn]

I'd tend to agree. I was wondering at a basic level if running a rsync across the drive "refreshed" the data. I'm just paranoid.

An rsync doesn't take nearly enough time to refresh all the data on a drive! 

[jamieburchell]

You can run the various SMART tests (short/long etc) if you like. That's all tools like Seatools actually do.

[jamieburchell]

An rsync doesn't take nearly enough time to refresh all the data on a drive!  

Presumably, the data must be read from the drive in order to compare it with the destination? That article suggests that hard drives automatically refresh the data when reading it - unless I mis-read.

All hard drives are programmed to refresh data as the heads skim along the drive

[gunrunnerjohn]

Presumably, the data must be read from the drive in order to compare it with the destination? That article suggests that hard drives automatically refresh the data when reading it - unless I mis-read.

IMO, that's pure BS!  I'm beginning to doubt what these guys are saying overall!

[jamieburchell]

Could it mean that the platters are remagnetised by the heads or something. I have no idea

[gunrunnerjohn]

The only way to "refresh" data is to do a write operation.  This is basic magnetic physics.  In point of fact, the continual passes of the head, if they did anything, would tend to erode the data.

All that I read about long term storage of hard disks is you're more likely to have a problem with the drive spinning up again due to dry bearings or the like.

If the data is REALLY important, there are archive quality DVD-R/+R media that is supposed to last a long time.  Save the data on a hard disk and on the DVD, and compare them every year to verify both copies are still intact.

[jamieburchell]

I'll just format the backup drives every now and then when my OCD kicks in