因此，我的硬盘上有几个 ext4 分区，还有一次，我的复制速度为 8-12 Mb/s，但现在约为 1-2 Mb/s，而且因为我想复制 70 GB，所以速度太慢了。任何帮助都非常感谢。我有一个全新安装的 Ubuntu 16.04.02，我也尝试使用 手动安装它mount /dev/sda4 /media/user/。这可能是我的错？
编辑
笔记 ：
- 使用 Debian Jessie 我复制同样的文件时速度达到 30 Mb/s
- 使用另一个我没有手动挂载的分区，我得到了 8-12 Mb/s
- 它不在另一个硬盘上，这是我的内置硬盘，容量为 500 GB，上面有多个 ext4 分区。这个硬盘上还有我的 Ubuntu。
我不认为这些文件有多小，但是它们都不同，许多大约 1MB，许多小型 txt 文件和程序大约 5-100 KB，甚至一些我下载的 Ubuntu iso...，但它们不是那么小，例如包含一个字符并且文件名尽可能长...
smartctl -a /dev/sda4 的输出：
信息：
=== START OF INFORMATION SECTION ===
Model Family: Seagate Laptop Thin HDD
Device Model: ST500LT012-1DG142
Serial Number: W3PFMRFQ
LU WWN Device Id: 5 000c50 08293eb8d
Firmware Version: 0002LVM1
User Capacity: 500.107.862.016 bytes [500 GB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Form Factor: 2.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Mar 25 13:03:51 2017 CET
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: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 0) 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: ( 101) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x1031) SCT Status supported.
SCT Feature Control supported.
SCT Data Table 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 118 099 034 Pre-fail Always - 183936888
3 Spin_Up_Time 0x0003 099 099 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 098 098 020 Old_age Always - 3023
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 078 060 030 Pre-fail Always - 64977593
9 Power_On_Hours 0x0032 094 094 000 Old_age Always - 5283
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 099 099 020 Old_age Always - 1844
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 064 054 045 Old_age Always - 36 (Min/Max 22/37)
191 G-Sense_Error_Rate 0x0032 099 099 000 Old_age Always - 2489
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 522
193 Load_Cycle_Count 0x0032 059 059 000 Old_age Always - 82582
194 Temperature_Celsius 0x0022 036 046 000 Old_age Always - 36 (0 15 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
254 Free_Fall_Sensor 0x0032 100 100 000 Old_age Always - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
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.