USB flashdrive light goes on for no apparent reason.
I have a flash drive with nothing but data, music on it, but when I'm
doing other things totally unrelated, the light in the flash drive goes
on for short periods. Not a problem but I just want to understand. Can
you all tell me why the light goes on?
USB flashdrive light goes on for no apparent reason.
I have a flash drive with nothing but data, music on it, but when I'm
doing other things totally unrelated, the light in the flash drive goes
on for short periods. Not a problem but I just want to understand. Can
you all tell me why the light goes on?
On 2/19/2026 9:39 PM, micky wrote:
USB flashdrive light goes on for no apparent reason.
I have a flash drive with nothing but data, music on it, but when I'm
doing other things totally unrelated, the light in the flash drive goes
on for short periods. Not a problem but I just want to understand. Can
you all tell me why the light goes on?
A virus scan?
Automatic defrag?
On Thu, 2/19/2026 8:39 AM, micky wrote:
USB flashdrive light goes on for no apparent reason.
I have a flash drive with nothing but data, music on it, but when I'm
doing other things totally unrelated, the light in the flash drive goes
on for short periods. Not a problem but I just want to understand. Can
you all tell me why the light goes on?
Windhawk ? Explorer Patcher ? Clean machine ???
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Not all activity will show up that way, but it's a damn sight easier
than using WinDBG. If the system is doing physical layer access (unlikely), >then that may not show up.
We used to see this behavior on older Windows. If you had a DVD
in the drive, it would "do a sniff" of J: every once in a while.
In some cases, people would see sniffing once a second. There
is no particular reason this should be going on today, unless
you have configured Windows Defender to do this (DevMode?).
They don't even tell you here, whether enabling that causes
USB sticks to be scanned. I have not particularly noticed my
8GB stick being scanned (the one with the very nice LED), but
on the other hand, I have seen my fair share of unnecessary
defender yellow warnings on my D: drive.
https://learn.microsoft.com/en-us/windows/advanced-settings/developer-mode
Paul--- Synchronet 3.21b-Linux NewsLink 1.2
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >>then look to see if a particular partition letter is being accessed.
That would work, but the output is so big. And below you say not all >activity would show up.
--- Synchronet 3.21b-Linux NewsLink 1.2https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Using win11 but you win10 guys are pretty sharp. Did
In alt.comp.os.windows-11, on Thu, 19 Feb 2026 10:59:42 -0500, Paul <nospam@needed.invalid> wrote:
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >> then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Can't get to Agent or Eudora either (like Firefox) to type results when procmon running. Is that normal?
Fortunely I've learned the secret method in win11 to take screen shots.
Af least that worked.
504 Create file E:\ Success Desired Access R...
504 File sysem cont E:\ Invalid Device R. Control 0x9023c(D...
504 Close file E:\ Success
And more stuff like this. I'll give more details if anyone wants.
So why is it doing this, trying to access the drive? And how can I make
it stop?
Using win11 but you win10 guys are pretty sharp. Did
In alt.comp.os.windows-11, on Thu, 19 Feb 2026 10:59:42 -0500, Paul <nospam@needed.invalid> wrote:
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >> then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Can't get to Agent or Eudora either (like Firefox) to type results when procmon running. Is that normal?
Fortunely I've learned the secret method in win11 to take screen shots.
Af least that worked.
504 Create file E:\ Success Desired Access R...
504 File sysem cont E:\ Invalid Device R. Control 0x9023c(D...
504 Close file E:\ Success
And more stuff like this. I'll give more details if anyone wants.
So why is it doing this, trying to access the drive? And how can I make
it stop?
Yes, Shift-PrtScn works, and puts a copy of the screen[]
into the Clipboard. You can then paste that into a graphics
editing application.
I should have thought of those, but...
A virus scan?
Been happeing now for 3.5 hours, and maybe last night too. No scan
takes that long.
Automatic defrag?
Just wrote the files yesterday to a blank flashdrive, 3GB into a 16GB drive. No fragmenting to defrag. --- But in general, do I have
automatic defragging? How would I know?
Just my wild guesses. I am also curious about the constantly flashing HDI think this "Hard Disk LED" should be re-labelled as "Trust Me"! :)
LED as well, not just the USB ports!!
Using win11 but you win10 guys are pretty sharp. Did
In alt.comp.os.windows-11, on Thu, 19 Feb 2026 10:59:42 -0500, Paul <nospam@needed.invalid> wrote:
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >> then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Can't get to Agent or Eudora either (like Firefox) to type results when procmon running. Is that normal?
Fortunely I've learned the secret method in win11 to take screen shots.
Af least that worked.
504 Create file E:\ Success Desired Access R...
504 File sysem cont E:\ Invalid Device R. Control 0x9023c(D...
504 Close file E:\ Success
And more stuff like this. I'll give more details if anyone wants.
So why is it doing this, trying to access the drive? And how can I make
it stop?
On 2/20/2026 12:34 AM, micky wrote:
I should have thought of those, but...
A virus scan?
Been happeing now for 3.5 hours, and maybe last night too. No scan
takes that long.
Automatic defrag?
Just wrote the files yesterday to a blank flashdrive, 3GB into a 16GB
drive. No fragmenting to defrag. --- But in general, do I have
automatic defragging? How would I know?
Just my wild guesses. I am also curious about the constantly flashing HD
LED as well, not just the USB ports!!
Back in the MS-DOS single-user, no-networking days, everything was more certain. The floppy diskette drive never ever made a sound suddenly. :)
Mr. Man-wai Chang <toylet.toylet@gmail.com> wrote:
On 2/20/2026 12:34 AM, micky wrote:
I should have thought of those, but...
A virus scan?
Been happeing now for 3.5 hours, and maybe last night too. No scan
takes that long.
Automatic defrag?
Just wrote the files yesterday to a blank flashdrive, 3GB into a 16GB
drive. No fragmenting to defrag. --- But in general, do I have
automatic defragging? How would I know?
Just my wild guesses. I am also curious about the constantly flashing HD
LED as well, not just the USB ports!!
Back in the MS-DOS single-user, no-networking days, everything was more
certain. The floppy diskette drive never ever made a sound suddenly. :)
Oh yes, it did. Especially in MS Word. It would often randomly seek to all physical drives when doing other actions. It was some deep-seated
assumption that everything would be stored on a removable disk and it
needed to check that it was still there before doing anything.
On Sun, 2/22/2026 12:08 PM, Chris wrote:
Mr. Man-wai Chang <toylet.toylet@gmail.com> wrote:
On 2/20/2026 12:34 AM, micky wrote:
I should have thought of those, but...
A virus scan?
Been happeing now for 3.5 hours, and maybe last night too. No scan
takes that long.
Automatic defrag?
Just wrote the files yesterday to a blank flashdrive, 3GB into a 16GB
drive. No fragmenting to defrag. --- But in general, do I have
automatic defragging? How would I know?
Just my wild guesses. I am also curious about the constantly flashing HD >> LED as well, not just the USB ports!!
Back in the MS-DOS single-user, no-networking days, everything was more >> certain. The floppy diskette drive never ever made a sound suddenly. :)
Oh yes, it did. Especially in MS Word. It would often randomly seek to all physical drives when doing other actions. It was some deep-seated assumption that everything would be stored on a removable disk and it needed to check that it was still there before doing anything.
If you watch with Process Monitor, you will see some pretty
unbelievable scanning sequences in there. They are logically
unrelated to anything! But what would be the point of me
telling people this. And no, it's not malware.
Using win11 but you win10 guys are pretty sharp. Did
In alt.comp.os.windows-11, on Thu, 19 Feb 2026 10:59:42 -0500, Paul ><nospam@needed.invalid> wrote:
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile", >>then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Can't get to Agent or Eudora either (like Firefox) to type results when >procmon running. Is that normal?
Fortunely I've learned the secret method in win11 to take screen shots.
Af least that worked.
504 Create file E:\ Success Desired Access R...
504 File sysem cont E:\ Invalid Device R. Control 0x9023c(D...
504 Close file E:\ Success
And more stuff like this. I'll give more details if anyone wants.
So why is it doing this, trying to access the drive? And how can I make
it stop?
Paul <nospam@needed.invalid> wrote:
On Sun, 2/22/2026 12:08 PM, Chris wrote:
Mr. Man-wai Chang <toylet.toylet@gmail.com> wrote:
On 2/20/2026 12:34 AM, micky wrote:Oh yes, it did. Especially in MS Word. It would often randomly seek to all >>> physical drives when doing other actions. It was some deep-seated
I should have thought of those, but...
A virus scan?
Been happeing now for 3.5 hours, and maybe last night too. No scan
takes that long.
Automatic defrag?
Just wrote the files yesterday to a blank flashdrive, 3GB into a 16GB >>>>> drive. No fragmenting to defrag. --- But in general, do I have
automatic defragging? How would I know?
Just my wild guesses. I am also curious about the constantly flashing HD >>>> LED as well, not just the USB ports!!
Back in the MS-DOS single-user, no-networking days, everything was more >>>> certain. The floppy diskette drive never ever made a sound suddenly. :) >>>
assumption that everything would be stored on a removable disk and it
needed to check that it was still there before doing anything.
If you watch with Process Monitor, you will see some pretty
unbelievable scanning sequences in there. They are logically
unrelated to anything! But what would be the point of me
telling people this. And no, it's not malware.
No criticism, just a observation:
You often mention Process Monitor, but as far as I know, Process
Monitor is add-on software, while for tasks like this - i.e. checking
which processes are doing what on a certain drive - the bundled Resource Monitor is perfectly OK/sufficient.
Resource Monitor's 'Disk' tab has both a 'Disk Activity' pane - giving program name, PID and File - and a 'Processes with Disk Activity' pane
- giving program name, PID and Read/Write/Total B/sec.
In my experience the 'Disk Activity' pane is often enough for cases
like the ones in this thread, especially when combined with the 'Queue Length' graphs per drive in the righthand pane.
For those unaware of Resource Monitor: You can of course find it by
typing the name into Search or by Task Manager -> 'Performance' tab -> three-horizontal-dots icon in the upper right -> Resource Monitor.
[...]
In alt.comp.os.windows-10, on Thu, 19 Feb 2026 16:20:07 -0500, micky <NONONOmisc07@fmguy.com> wrote:
Using win11 but you win10 guys are pretty sharp. Did
In alt.comp.os.windows-11, on Thu, 19 Feb 2026 10:59:42 -0500, Paul
<nospam@needed.invalid> wrote:
Process Monitor, Filter set to "Operation is Readfile/Writefile/Createfile",
then look to see if a particular partition letter is being accessed.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
Can't get to Agent or Eudora either (like Firefox) to type results when
procmon running. Is that normal?
Fortunely I've learned the secret method in win11 to take screen shots.
Af least that worked.
504 Create file E:\ Success Desired Access R...
504 File sysem cont E:\ Invalid Device R. Control 0x9023c(D...
504 Close file E:\ Success
And more stuff like this. I'll give more details if anyone wants.
So why is it doing this, trying to access the drive? And how can I make
it stop?
There were other references later, not the same as this.
I was going to adjust the column widths so none of the messages would be truncated. And I was going to take photos with my phone, so I could
get more than one photo, of different parts of the file, in one session.
But I actually loaded the file with songs, tested it, and moved it to my suitcase, soI'll never know what it was doing, but I hated that light.
It was like the phone was ringing. It's quiet now. zzzzzzzz.
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