Высокий IOWait и Медленная “Синхронизация кэшировали чтения”

У меня есть высокий IOWait и и обычно медленная скорость диска. (на жестком диске TOSHIBA MK5061GSYN на 7 200 об/мин) Мое использование диска %100 в Windows 8 также, таким образом, я не думаю, что это - связанный Linux. Я знаю, что у меня есть 182 сбойных блока, но все они перераспределены так, я не думаю, что они вызовут любую проблему. "sudo hdparm-tT/dev/sda"

/dev/sda:
 Timing cached reads:     2 MB in  2.87 seconds = 713.09 kB/sec
 Timing buffered disk reads: 198 MB in  3.02 seconds =  65.67 MB/sec

Моя внешняя SAMSUNG HM161HI на 160 ГБ 5 400 об/мин управляет "sudo hdparm-tT/dev/sdb"

/dev/sdb:
 Timing cached reads:   14614 MB in  1.99 seconds = 7330.51 MB/sec
 Timing buffered disk reads:  94 MB in  3.03 seconds =  31.06 MB/sec

Состояние S.M.A.R.T.:

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-32-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Toshiba 2.5" HDD MK..61GSY[N]
Device Model:     TOSHIBA MK5061GSYN
Serial Number:    82NRT1ZLT
LU WWN Device Id: 5 000039 431d06641
Firmware Version: MH000C
User Capacity:    500.107.862.016 bytes [500 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    7200 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 (current: 3.0 Gb/s)
Local Time is:    Fri Oct 31 21:45:02 2014 EET
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:  (0x05) Offline data collection activity
                    was aborted by an interrupting command from host.
                    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:        (  120) seconds.
Offline data collection
capabilities:            (0x51) SMART execute Offline immediate.
                    No Auto Offline data collection support.
                    Suspend Offline collection upon new
                    command.
                    No Offline surface scan supported.
                    Self-test supported.
                    No 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:    ( 113) minutes.
SCT capabilities:          (0x003f) 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   100   100   050    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0027   100   100   050    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0023   100   100   002    Pre-fail  Always       -       2280
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       1060
  5 Reallocated_Sector_Ct   0x0033   092   092   010    Pre-fail  Always       -       182
  7 Seek_Error_Rate         0x002f   100   100   050    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0025   100   100   050    Pre-fail  Offline      -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       357
 10 Spin_Retry_Count        0x0033   121   100   030    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       396
183 Runtime_Bad_Block       0x0032   100   100   001    Old_age   Always       -       0
184 End-to-End_Error        0x0033   100   100   097    Pre-fail  Always       -       0
185 Unknown_Attribute       0x0032   100   100   001    Old_age   Always       -       65535
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   097   000    Old_age   Always       -       11
189 High_Fly_Writes         0x003a   100   100   001    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   055   048   040    Old_age   Always       -       45 (Min/Max 29/45)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       1
192 Power-Off_Retract_Count 0x0022   100   100   000    Old_age   Always       -       983055
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       7139
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       16
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
199 UDMA_CRC_Error_Count    0x0032   200   253   000    Old_age   Always       -       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%       357         -
# 2  Short offline       Aborted by host               60%       350         -
# 3  Short offline       Completed without error       00%       292         -
# 4  Short offline       Completed without error       00%       290         -
# 5  Short offline       Aborted by host               10%       289         -
# 6  Short offline       Aborted by host               10%       288         -
# 7  Short offline       Completed without error       00%       195         -
# 8  Short offline       Completed without error       00%       143         -
# 9  Short offline       Completed without error       00%       142         -
#10  Short offline       Completed without error       00%         3         -

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.

Информация о системе:

System:    Host: ege-LIFEBOOK-AH532-G21 Kernel: 3.13.0-32-generic x86_64 (64 bit) Desktop: Gnome Distro: Ubuntu 14.04 trusty
Machine:   System: FUJITSU (portable) product: LIFEBOOK AH532/G21
           Mobo: FUJITSU model: FJNBB2B Bios: FUJITSU // Phoenix version: Version 2.09 date: 02/20/2013
CPU:       Dual core Intel Core i5-3210M CPU (-HT-MCP-) cache: 3072 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) 
           Clock Speeds: 1: 1200.00 MHz 2: 1200.00 MHz 3: 2400.00 MHz 4: 1200.00 MHz
Graphics:  Card-1: Intel 3rd Gen Core processor Graphics Controller 
           Card-2: NVIDIA GF108M [GeForce GT 620M] 
           X.Org: 1.15.1 drivers: intel (unloaded: fbdev,vesa) FAILED: nouveau Resolution: 1366x768@60.0hz 
           GLX Renderer: Mesa DRI Intel Ivybridge Mobile GLX Version: 3.0 Mesa 10.1.3
Audio:     Card: Intel 7 Series/C210 Series Family High Definition Audio Controller driver: snd_hda_intel 
           Sound: Advanced Linux Sound Architecture ver: k3.13.0-32-generic
Network:   Card-1: Intel Centrino Wireless-N 2230 driver: iwlwifi 
           IF: wlan0 state: up mac: 84:a6:c8:1a:1e:4a
           Card-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169 
           IF: eth0 state: down mac: 2c:d4:44:91:7c:60
Drives:    HDD Total Size: 664.2GB (11.9% used) 1: id: /dev/sda model: TOSHIBA_MK5061GS size: 500.1GB 
           2: USB id: /dev/sdc model: USB_Flash_Disk size: 4.0GB 3: USB id: /dev/sdb model: HM161HI size: 160.0GB 
Partition: ID: / size: 147G used: 4.2G (3%) fs: ext4 ID: swap-1 size: 4.10GB used: 0.00GB (0%) fs: swap 
RAID:      No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors:   System Temperatures: cpu: 57.0C mobo: N/A 
           Fan Speeds (in rpm): cpu: N/A 
Info:      Processes: 211 Uptime: 25 min Memory: 876.4/3811.2MB Client: Shell (bash) inxi: 1.9.17 

Править: Я выпустил "hdparm-tT/dev/sda" на живом USB, и скорость, кажется, прекрасна:

/dev/sda:
 Timing cached reads:   15282 MB in  1.99 seconds = 7667.29 MB/sec
 Timing buffered disk reads: 288 MB in  3.01 seconds =  95.63 MB/sec

Что может вызвать эту проблему в установленной системе?

РЕДАКТИРОВАНИЕ 2: Вчера мой жесткий диск умер. Мой компьютер больше даже не распознает его. Я скоро заменю его.