Delucidazioni su UDMA CRC error

[stefa.rossi]

Salve a tutti.

Ho qualche problema con un hard disk WD Red da 3TB (WDC WD30EFRX). SMART mi segnala diversi errori UDMA CRC, il "raw value" è altino (1315). L'hard disk è abbastanza nuovo, l'ho acquistato a gennaio 2013. Ho cambiato più volte il cavo SATA, e anche con un altra scheda madre ogni tanto dà qualche errore. Ah, l'hard disk è un SATA3, ma la scheda madre è SATA2.

Può essere la scheda madre o il sistema operativo? L'hard disk è stato formattato con FreeBSD. Attualmente lo uso in una macchina virtuale (guest Linux, host FreeBSD), quando avviene un errore il sistema operativo nella macchina virtuale "freeza", esattamente come faceva quando l'hard disk era collegato ad un altro computer con FreeBSD non virtualizzato. Noto questi errori la maggior parte delle volte quando scrivo sull'hard disk.

Gli altri valori sembrano tutti a posto. Cosa ne pensate? È un drive "pericoloso", o posso usarlo tranquillamente?

Qui un log SMART completo:

sudo smartctl -a /dev/sdb 
smartctl 5.43 2012-06-05 r3561 [x86_64-linux-3.9-1-amd64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD30EFRX-68AX9N0
Serial Number:    ################
LU WWN Device Id: 5 0014ee 602e057d0
Firmware Version: 80.00A80
User Capacity:    3,000,592,982,016 bytes [3,00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  ACS-2 (revision not indicated)
Local Time is:    Wed Aug  7 21:13:00 2013 CEST
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:      ( 249)    Self-test routine in progress...
                    90% of test remaining.
Total time to complete Offline 
data collection:         (40560) 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:      ( 407) minutes.
Conveyance self-test routine
recommended polling time:      (   5) minutes.
SCT capabilities:            (0x70bd)    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     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   198   177   021    Pre-fail  Always       -       5058
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       566
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   095   095   000    Old_age   Always       -       4139
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       413
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       264
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       301
194 Temperature_Celsius     0x0022   108   099   000    Old_age   Always       -       42
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   186   000    Old_age   Always       -       1315
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       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%      4026         -
# 2  Short offline       Completed without error       00%      1939         -
# 3  Short offline       Completed without error       00%      1403         -
# 4  Short offline       Completed without error       00%       668         -
# 5  Short offline       Completed without error       00%       409         -
# 6  Extended offline    Completed without error       00%        22         -
# 7  Extended offline    Aborted by host               10%        14         -
# 8  Short offline       Completed without error       00%         8         -
# 9  Short offline       Interrupted (host reset)      80%         2         -

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.

Grazie.

 

[serassone]

L'unità potrebbe avere dei problemi, in effetti. Occorrerebbe testarla con la diagnostica di WD, Data Lifeguard Diagnostic, ma WD offre solo la versione per Windows; ti conviene quindi scaricare Ultimate Boot CD, che possiede ancora la versione DOS:
Ultimate Boot CD - Download the UBCD
masterizza il file ISO su cd, avvia il pc con questo cd, vai sotto "HDD", poi sotto "Diagnosis" e avvia Data Lifeguard Diagnostic; fai un test completo.