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Internal Harddrives Slow but Fast When Plugged via Dock (External)

This is a discussion on Internal Harddrives Slow but Fast When Plugged via Dock (External) within the Hard Drive Support forums, part of the Tech Support Forum category. Hi! All my internal harddrives began to slow down (1 MB/sec) write speed for example. I have a system SSD,


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Old 12-02-2018, 04:42 AM   #1
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Hi!

All my internal harddrives began to slow down (1 MB/sec) write speed for example. I have a system SSD, and it's the only thing that seems unaffected. But if I take out my internal harddrives and put them on an external dock, they run fast (100+ MB/sec) write speed. I bought two new harddrives to test, and it's the same problem.

What do you think is the cause?

Internal Harddrives:
Seagate Barracuda 7200 RPM ranging 2-4TB each drive.
Total of 2 plugged in each time.

PC Specs:
Motherboard: ASUS Z170 Pro Gaming
CPU: Intel 6700K Unlocked
RAM: 32GB Ripjaws
Video Card: MSI GeForce 1070
SSD: Samsung EVO 500GB
PSU: Seasonic G-650 Gold

It's just a 2-year old rig. It's been going on for a year, probably. But I just didn't have time to check it out. I remember trying to test the HDDs on HDTUne or something, and it's like a 30% health or it has really bad results, but then again when I take them out from the internal and to dock, they are all good. And again, I bought new drives, and it's still the same slow speed.

Let me know if you need anything else. Thank you!
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Old 12-02-2018, 10:02 AM   #2
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If it is just writes that are slow, check to be sure that the policy write caching is enabled.
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Old 12-02-2018, 04:29 PM   #3
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Quote:
Originally Posted by spike6479 View Post
If it is just writes that are slow, check to be sure that the policy write caching is enabled.
It's both read/write. Even just playing back any video file, it's lagging on VLC/media player.
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Old 12-02-2018, 04:57 PM   #4
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Change SATA cables, Change SATA Ports, Boot into Setup (Bios) Integrated Peripherals,, make sure there are no limits on data exchange, and that each port is enabled and at full speed.
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Old 12-02-2018, 05:38 PM   #5
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Quote:
Originally Posted by spunk.funk View Post
Change SATA cables, Change SATA Ports, Boot into Setup (Bios) Integrated Peripherals,, make sure there are no limits on data exchange, and that each port is enabled and at full speed.
Changing SATA ports is the only thing I haven't done, does that mean SATA port from the motherboard?
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Old 12-02-2018, 11:25 PM   #6
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Choose a different SATA port on the motherboard that the SATA data cable from the back of the drive is plugged into.
Also, try a different SATA Data cable. Try a different SATA power plug from the PSU into the back of the drive.
Look in the Bios for Overclocking, or limitations on the SATA port.
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Old 12-03-2018, 03:48 AM   #7
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I would suggest installing hdsentinel (https://www.hdsentinel.com/) and checking the SMART data. It will tell you if there are any errors on the disc or transmission that could be the cause of your issues. Swapping cables and checking bios setting are also good strategies.
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Old 12-12-2018, 05:38 PM   #8
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Hi!

I did the HDSentinel Extended Test. At first run, it seems to have ended, like it was only a few minutes before completion (After around 12 hours of running the test). So I browsed the internet, and when I went back to HDSentinel, it seems to reset back to zero? So I left it and slept for another 7 hours, and now it's stuck at "estimated time remaining 1 minute" with progress bar at around 15-20% since last night.

So I went to the S.M.A.R.T. tab, is this supposed to be the results so far?

1,Raw Read Error Rate,6,84,64,OK,00000E513AA6,0,Enabled
3,Spin Up Time,0,94,94,OK (Always passing),000000000000,0,Enabled
4,Start/Stop Count,20,100,100,OK,0000000003B0,0,Enabled
5,Reallocated Sectors Count,10,100,100,OK,000000000000,0,Enabled
7,Seek Error Rate,45,88,60,OK,000022A3D0D2,0,Enabled
9,Power On Time Count,0,96,96,OK (Always passing),28A800000FF9,0,Enabled
10,Spin Retry Count,97,100,100,OK,000000000000,0,Enabled
12,Drive Power Cycle Count,20,100,100,OK,000000000393,0,Enabled
183,SATA Downshift Count,0,100,100,OK (Always passing),000000000000,0,Enabled
184,End-to-End Error Count,99,100,100,OK,000000000000,0,Enabled
187,Reported Uncorrectable Errors,0,100,100,OK (Always passing),000000000000,0,Enabled
188,Command Timeout,0,100,100,OK (Always passing),000000000000,0,Enabled
189,High Fly Writes,0,100,100,OK (Always passing),000000000000,0,Enabled
190,Airflow Temperature,40,64,60,OK,0000261C0024,0,Enabled
191,G-Sense Error Rate,0,100,100,OK (Always passing),000000000000,0,Enabled
192,Power off Retract Cycle Count,0,100,100,OK (Always passing),0000000000B3,0,Enabled
193,Load/Unload Cycle Count,0,93,93,OK (Always passing),000000003B1E,0,Enabled
194,Disk Temperature,0,36,40,OK (Always passing),001600000024,0,Enabled
197,Current Pending Sector Count,0,100,100,OK (Always passing),000000000000,0,Enabled
198,Off-Line Uncorrectable Sector Count,0,100,100,OK (Always passing),000000000000,0,Enabled
199,Ultra ATA CRC Error Count,0,200,200,OK (Always passing),000000000000,0,Enabled
240,Head Flying Hours,0,100,253,OK (Always passing),4F2A00000FEB,0,Enabled
241,Total LBA Written,0,100,253,OK (Always passing),00022A4A709C,0,Enabled
242,Total LBA Read,0,100,253,OK (Always passing),000613DE9813,0,Enabled


On Disk Performance tab:

Transfer Rate Information
Total Data Read,"131 MB, 1,932 MB since installation (12/10/2018)"
Total Data Write,"12 MB, 1,705 MB since installation"
Average Reads Per Day,644.00 MB
Average Writes Per Day,568.33 MB
Current Transfer Rate,0 KB/s
Average Transfer Rate,0 KB/s
Maximum Transfer Rate,"4,095 KB/s"
Current Read Rate,0 KB/s
Current Write Rate,0 KB/s
Current Disk Activity,0 %
Average Disk Activity,6.11 %
Estimated Max. Transfer Rate,"4,136 KB/s [3x DVD Write Speed]"


Let me know if there's any more info I need to provide, or I need to do a diff approach. Many thanks to you guys!
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Old 12-13-2018, 04:20 AM   #9
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The SMART data confirms what you already knew, the drive is fine. That leaves the motherboard/BIOS and the OS as possible bottle necks. I'm not an expert in these areas. I would check to insure that AHCI is enabled in the BIOS and OS. perhaps running sfc and dism would repair OS issues.
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Old 12-13-2018, 08:46 AM   #10
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Quote:
All my internal harddrives began to slow down.....I have a system SSD, and it's the only thing that seems unaffected.
Each HDD and the SSD should have it's own SMART data. Make sure you scan all drives separately. Go to the Toolbar to Drives and select the drive you want to scan
Also try Crystal Disk Info. If you get any yellow caution labels, then that drive is in the state of beginning to fail. You should backup all data and make plans to replace the drive(s)
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