Bonjour,
 
 
J'ai un disque dur externe USB3. En le branchant sous Linux (slackware64) j'ai parfois des messages d'erreur du type
 
 
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[29173.917563] sd 11:0:0:0: [sdd] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x08
[29173.917572] sd 11:0:0:0: [sdd] tag#0 Sense Key : 0x4 [current] [descriptor]  
[29173.917578] sd 11:0:0:0: [sdd] tag#0 ASC=0x0 ASCQ=0x0  
[29173.917584] sd 11:0:0:0: [sdd] tag#0 CDB: opcode=0x85 85 06 2c 00 da 00 00 00 00 00 4f 00 c2 00 b0 00
[29583.549972] sd 11:0:0:0: [sdd] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x08
[29583.549982] sd 11:0:0:0: [sdd] tag#0 Sense Key : 0x4 [current] [descriptor]  
[29583.549987] sd 11:0:0:0: [sdd] tag#0 ASC=0x0 ASCQ=0x0  
[29583.549992] sd 11:0:0:0: [sdd] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 00 e5 00
[29583.765021] sd 11:0:0:0: [sdd] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x08
[29583.765030] sd 11:0:0:0: [sdd] tag#0 Sense Key : 0x4 [current] [descriptor]  
[29583.765036] sd 11:0:0:0: [sdd] tag#0 ASC=0x0 ASCQ=0x0  
[29583.765041] sd 11:0:0:0: [sdd] tag#0 CDB: opcode=0xa1 a1 06 20 da 00 00 4f c2 00 b0 00 00
[30183.499573] sd 11:0:0:0: [sdd] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=0x08
[30183.499583] sd 11:0:0:0: [sdd] tag#0 Sense Key : 0x4 [current] [descriptor]  
[30183.499588] sd 11:0:0:0: [sdd] tag#0 ASC=0x0 ASCQ=0x0  
[30183.499593] sd 11:0:0:0: [sdd] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 00 e5 00
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La commande "smartctl -a /dev/sdd" donne
 
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smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.4.23] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
 
=== START OF INFORMATION SECTION ===
Model Family:     Seagate Desktop HDD.15
Device Model:     ST4000DM000-1F2168
Serial Number:    S300F2CL
LU WWN Device Id: 5 000c50 06da39225
Firmware Version: CC54
User Capacity:    4 000 787 030 016 bytes [4,00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5900 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Mon Oct  3 13:30:52 2016 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
See vendor-specific Attribute list for marginal Attributes.
 
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:                (  117) seconds.
Offline data collection
capabilities:                    (0x73) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        No 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:        (   1) minutes.
Extended self-test routine
recommended polling time:        ( 524) minutes.
Conveyance self-test routine
recommended polling time:        (   2) minutes.
SCT capabilities:              (0x1085) SCT Status supported.
 
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   119   099   006    Pre-fail  Always       -       212762392
  3 Spin_Up_Time            0x0003   092   091   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       515
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   100   253   030    Pre-fail  Always       -       421252
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       695
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       377
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       -       0 0 1
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   067   045   045    Old_age   Always   In_the_past 33 (Min/Max 23/33)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       74
193 Load_Cycle_Count        0x0032   099   099   000    Old_age   Always       -       2528
194 Temperature_Celsius     0x0022   033   055   000    Old_age   Always       -       33 (0 16 0 0 0)
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       -       0
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       457h+44m+52.732s
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       6124555672
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       2731587757
 
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%       694         -
# 2  Short offline       Completed without error       00%       694         -
# 3  Short offline       Completed without error       00%       693         -
 
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.
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Le seul truc anormal qui apparait c'est
 
190 Airflow_Temperature_Cel 0x0022   067   045   045    Old_age   Always   In_the_past 33 (Min/Max 23/33)
 
 
 
Je n'ai eu aucune I/O erreur. Quel est le problème ?
 
 
 
 
[

Si ce boitier n'a pas ventilation, il faudrait voir pour en mettre un.
Ce DD est-il sous tension en permanence ?

Non, il est branché au plus quelques heures par jour, et pas tous les jours. Ce qui est bizarre c'est qu'il y a quelque chose pour "Airflow_Temperature_Cel" et pas pour "Temperature_Celsius".