慢硬盘？

Question

一段时间前，我注意到我的桌面比平时慢了。它看起来是一个麻烦的来源是硬盘(没有这种问题的Live )-但我不明白原因。有一个信息从smartctl -谁能解释，什么可能是错误的？

smartctl --all /dev/sda

smartctl 6.1 2013-03-16 r3800 [x86_64-linux-3.8.2] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Scorpio Blue Serial ATA (AF)
Device Model:     WDC WD5000BPVT-00HXZT3
Serial Number:    WD-WXF1E62KSHM2
LU WWN Device Id: 5 0014ee 658207174
Firmware Version: 01.01A01
User Capacity:    500 107 862 016 bytes [500 GB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Sun May  4 23:07:15 2014 NOVT
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:        (12060) 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:    ( 120) minutes.
Conveyance self-test routine
recommended polling time:    (   5) minutes.
SCT capabilities:          (0x7035) 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     0x002f   200   200   051    Pre-fail  Always       -       8
  3 Spin_Up_Time            0x0027   178   177   021    Pre-fail  Always       -       2083
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       966
  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       -       3887
 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       -       966
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       48
193 Load_Cycle_Count        0x0032   185   185   000    Old_age   Always       -       46771
194 Temperature_Celsius     0x0022   103   100   000    Old_age   Always       -       44
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   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   100   253   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%      3884         -
# 2  Short offline       Completed without error       00%      2834         -

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.

Answer 1

如果HDD不得不重新读取一个坏的块或坏的扇区，这开始失败，它将尝试重读一个给定的部分几次，直到它能够这样做。这种行为将表现为HDD“减速”，但这是一种必须从磁盘读取给定区域的行为，您正在经历许多次。

通常，当发生这种情况时，我将通过HDAT2或SpinRite运行HDD，以确定磁盘上是否有任何坏块，并指示这两个工具中的任何一个尝试修复和/或从有缺陷的块中恢复数据。

这只是一个短期的修复；通常情况下，如果它继续发生，那么它通常是一个更大问题的征兆，在不远的将来，HDD将会失败。如果是这样的话，那么我将开始计划在问题驱动器实际失败之前从问题驱动器获得替换和迁移数据。