了解smartctl -a输出

我在NAS盒子里有6个驱动器.其中两个是Seagates,他们返回高RAW_VALUES错误;见下文.

我的其他驱动器显示更低的值.

这是引起警报的原因吗?或者只是希捷报道的方式?

查看Raw_Read_Error_Rate和Seek_Error_Rate:

# smartctl -a /dev/ada1
=== START OF INFORMATION SECTION ===
Device Model:     ST3000DM001-9YN166
Serial Number:    W1F09S26
LU WWN Device Id: 5 000c50 0456076fc
Firmware Version: CC4C
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:  ATA-8-ACS revision 4
Local Time is:    Sat Aug 18 17:34:24 2012 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:  (0x82) Offline data collection activity
                    was completed without error.
                    Auto Offline Data Collection: Enabled.
Self-test execution status:      ( 249) Self-test routine in progress...
                    90% of test remaining.
Total time to complete Offline 
data collection:        (  575) 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:    (   1) minutes.
Extended self-test routine
recommended polling time:    ( 255) minutes.
Conveyance self-test routine
recommended polling time:    (   2) minutes.
SCT capabilities:          (0x3085) 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   111   099   006    Pre-fail  Always       -       34053632
  3 Spin_Up_Time            0x0003   093   092   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       32
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   060   055   030    Pre-fail  Always       -       21480133713
  9 Power_On_Hours          0x0032   097   097   000    Old_age   Always       -       2696
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       32
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
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   064   061   045    Old_age   Always       -       36 (Min/Max 34/38)
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       -       28
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       63
194 Temperature_Celsius     0x0022   036   040   000    Old_age   Always       -       36 (0 19 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      -       43748536879750
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       2867098636991
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       17478042509157

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  Extended offline    Self-test routine in progress 90%      2696         -

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.
Seagate使用SER(Seek_Error_Rate)来编码两个不同的计数器:16个高权重位用于Seek错误计数,32个低权重位用于Seek计数.您更希望使用十六进制显示来轻松读取这两个计数器(6个半字节= 2,错误计数4用于搜索计数).

RRER(Raw_Read_Error_Rate)不显示增量计数器,但结果类似于-10 log(错误扇区数/磁盘上的总位数),这解释了最小值和最大值.保持在最大值附近更好.

对此有更多解释:http://www.users.on.net/~fzabkar/HDD/Seagate_SER_RRER_HEC.html

翻译自:https://serverfault.com/questions/419007/understanding-smartctl-a-output

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