HDD on USB "unmounts" unexpectedly.

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seneka21
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Joined: 12 Nov 2022
Posts: 32
PostPosted: Mon Apr 29, 2024 20:06    Post subject: HDD on USB "unmounts" unexpectedly. Reply with quote
Hi everybody,

I have successfully mounted a pair of NTFS 2.5" HHDs on my x86's USB3 hardware ports running DD-WRT v3.0-r56029 std (04/27/24).
Everything seemed to run flawlessly according to Sharing through NAS configuration etc.
To make the long story short, I started an ~13 hours long multimedia files backup procedure from my windows 11 system to one of the DD-WRT attached HDDs. Unfortunately after a 1-2hours of continuous copying, I get an error message due to an unexpected unmount of both HDDs.
The only solution I have found is to manually detach-reattach the HHDs and so on and so forth every a couple of hours.
Is it something normal or Ι have to make some kind of adjustments to overcome it?

Best Regards.
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Per Yngve Berg
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Joined: 13 Aug 2013
Posts: 6920
Location: Romerike, Norway
PostPosted: Mon Apr 29, 2024 20:32    Post subject: Reply with quote
Format the drive as EXT4 rather than NTFS.
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seneka21
DD-WRT Novice


Joined: 12 Nov 2022
Posts: 32
PostPosted: Tue Apr 30, 2024 2:34    Post subject: Reply with quote
Thank you I ll give it a try.
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seneka21
DD-WRT Novice


Joined: 12 Nov 2022
Posts: 32
PostPosted: Tue Apr 30, 2024 5:46    Post subject: Reply with quote
It looks like that EXT4 was the solution.
2½ hours now non-stop copying! Very Happy
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Sp1derman
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Joined: 16 Jun 2006
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Location: Germany, BW
PostPosted: Tue Apr 30, 2024 16:38    Post subject: Reply with quote
You can give an update to your other post here, how you made the USB3 ports working.
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=336399

Could help other folks running into the same problem.
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seneka21
DD-WRT Novice


Joined: 12 Nov 2022
Posts: 32
PostPosted: Fri May 03, 2024 8:12    Post subject: Reply with quote
Sp1derman wrote:
You can give an update to your other post here, how you made the USB3 ports working.
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=336399

Could help other folks running into the same problem.


Dear Sp1derman thank you for your intervention.

You are right about posting it as a solution but I hesitated to do so before having a bit more conclusive evidence about.

Unfortunately, the problem persists and the previous resolution might have been a fluke 😊

It might be useful to mention that when I attach the same HDDs on the USB3 of my Access Point (ASUS RT-AC68U) I have no such disconnection issues.

Anyway, after performing some search about this issue, I located the topic “Prevent Harddisk Spindown” in dd-wrt wiki tutorials.

I followed the instructions for Harddisk Spindown prevention with the use of sdparm command and finally my system returned the following results

IDLE_B 0 [cha: n, def: 0, sav: 0]
IDLE_A 0 [cha: n, def: 0, sav: 0]
STANDBY_Z 0 [cha: y, def: 1, sav: 1]
IACT 0 [cha: n, def: 0, sav: 0]
SZCT 600 [cha: y, def:18000, sav:18000]
IBCT 0 [cha: n, def: 0, sav: 0]
ICCT 0 [cha: n, def: 0, sav: 0]
SYCT 0 [cha: n, def: 0, sav: 0]
CCF_IDLE 0 [cha: n, def: 0, sav: 0]
CCF_STAND 0 [cha: n, def: 0, sav: 0]
CCF_STOPP 0 [cha: n, def: 0, sav: 0]-sh: CCF_STOPP: not found

I am still checking if the problem is resolved or not.

BTW I according to the wiki the SZCT(?) PARAMETER should have CHANGED TO
[cha: n, def:18000, sav: 0] (please check the attached pic).

Any recommendation from anybody will appreciated.

Best regards
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seneka21
DD-WRT Novice


Joined: 12 Nov 2022
Posts: 32
PostPosted: Fri May 03, 2024 8:31    Post subject: Reply with quote
update to the previous topic:
After giving "sdparm --flexible -6 -v -S -p po --set=SZCT=0 /dev/sdd"
but still "sav" not zeroing. (SZCT 600 [cha: y, def:18000, sav:600])

Best Reagrds
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seneka21
DD-WRT Novice


Joined: 12 Nov 2022
Posts: 32
PostPosted: Fri May 03, 2024 22:13    Post subject: Reply with quote
Does this record from Syslog say smth?
"DD-WRT local5.err ksmbd: [ksmbd.mountd/6000]: ERROR: Invalid lock entry `5765'"
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