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Thread: Mapped network drives = explorer hangs?

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    Senior Member watercooled's Avatar
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    Mapped network drives = explorer hangs?

    I've been having this problem for some time and after some searching it seems I'm not alone but none of the threads have arrived at a cause/solution.

    It seems to be since I mapped network drives, occasionally when I drag+drop files over an explorer window (moving over the net drive icon in the left pane seems to increase chances), explorer will just hang, with the translucent file icon just floating there until the system recovers ~15 seconds later.

    Is anyone else having this problem/any ideas what's causing it. Antivirus has been mentioned occasionally in other threads but when I open task manager it doesn't appear to be hogging the CPU.

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    Re: Mapped network drives = explorer hangs?

    May be the other computer/NAS box has gone into sleep mode and needs to spin-up the hard drive first?

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    Re: Mapped network drives = explorer hangs?

    Yeah it's a possibility but the HDD only parks the heads, it doesn't spin down. Sometimes it only happens for a second or so and I can hear the HDD clunking so it's probably the cause in that case, but it doesn't explain the annoying ~15s hangs.

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    Re: Mapped network drives = explorer hangs?

    Quote Originally Posted by watercooled View Post
    Yeah it's a possibility but the HDD only parks the heads, it doesn't spin down. Sometimes it only happens for a second or so and I can hear the HDD clunking so it's probably the cause in that case, but it doesn't explain the annoying ~15s hangs.
    Next time it happens allow the 15 secs to pass and the files to copy then straight after try to copy over some different files to see if it really is a "sleep" issue.

    I get the same with my NAS btw.
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    Re: Mapped network drives = explorer hangs?

    I'll give it a go, but from memory subsequent copies happen fine. But the server is running Debian and except for parking the heads there should be no other sleep states.

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    Re: Mapped network drives = explorer hangs?

    Rgds,

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    Re: Mapped network drives = explorer hangs?

    Check your DNS/NetBIOS settings (I'm guessing there's no WINS)
    It could be that your client is sending DNS query, getting a negative and then sending a NetBIOS broadcast to resolve the name. One possible way of testing this theory is to add entries for the NAS hostname and FQDN to the hosts file of the client. Let me know if you want me to run you through the process.
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    Re: Mapped network drives = explorer hangs?

    I've had problems with slow file transfers using samba on a linux box. Mainly an issue with windows photo viewer, but Win7 seems to odd things with the open source SMB implementations.
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    Re: Mapped network drives = explorer hangs?

    Quote Originally Posted by badass View Post
    Check your DNS/NetBIOS settings (I'm guessing there's no WINS)
    It could be that your client is sending DNS query, getting a negative and then sending a NetBIOS broadcast to resolve the name. One possible way of testing this theory is to add entries for the NAS hostname and FQDN to the hosts file of the client. Let me know if you want me to run you through the process.
    I've mapped the drives via IP address and have NetBIOS disabled, could any of that be a problem?

    Quote Originally Posted by peterb View Post
    I've had problems with slow file transfers using samba on a linux box. Mainly an issue with windows photo viewer, but Win7 seems to odd things with the open source SMB implementations.
    When the transfer actually starts it's as fast as I'd expect i.e. HDD/GbE bottleneck.

    I've just been playing around again and managed to get a similar hang when attempting to drag a file from a local partition:

    This is basically what happens, the icon/box just hangs and explorer stops responding.
    Here's it appears to be MSE causing the hang but I'm pretty sure I've checked this in the past and I've not noticed MSE hogging the CPU (first thing I suspected), rather explorer.exe or dwm.exe IIRC but I'll keep trying and let you know what I find - it's quite intermittent and seems to happen when it's least convenient.

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    Re: Mapped network drives = explorer hangs?

    Well so far I've not been able to recreate it without MSE showing high CPU usage in Task Manager. Maybe I was just overcomplicating things but I really thought I'd checked that, MSE only showing in admin task manager might have something to do with it.

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    Re: Mapped network drives = explorer hangs?

    Quote Originally Posted by watercooled View Post
    Well so far I've not been able to recreate it without MSE showing high CPU usage in Task Manager. Maybe I was just overcomplicating things but I really thought I'd checked that, MSE only showing in admin task manager might have something to do with it.
    Have you tried disabling MSE real time protection and then seeing if it happens?
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    Re: Mapped network drives = explorer hangs?

    Have you previously used shares or mapped drives on to another system which is no longer on the network? If so, have a look through the registry for old references to them and clear them out.

    Also, try disabling the computer browser service.

    These hangs are usually the OS waiting for a responce from something that's no longer there. If you keep a command window open and run a netstat -a when the hang starts, you should be able to proove it from the output.

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    Re: Mapped network drives = explorer hangs?

    I've just reinstalled Windows after purchasing an SSD and apart from the occasional short freeze (~1s) with larger files which is probably due to AV, I've not noticed it happening (watch it happen after I post this). Depending on what was causing it it could be the process of re-installing (so fresh registry), or the faster SSD solving it. I've had a few shares mounted but thought I'd removed any I didn't use, I'll see how it goes.

    Thanks for the help everyone!

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